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Office of the Superintending Engineer_ I_CADD

VIEWS: 194 PAGES: 54

									                                                                               Office of the Superintending Engineer, I&CADD.,
                                                                                        Sripada Yellampally Project Circle,
                                                                                              Mancherial, Adilabad Dist.

                      Corrigendum No.6/2007- 08 of Package- 8                                                      Dt: 28-05-2008




                  Name of Work : PRANAHITA-CHEVELLA LIFT IRRIGATION SCHEME – LINK- II - PACKAGE- 8–Detailed
                 Investigation , Designs and Execution of Lift Irrigation Scheme for drawl and lifting of 114.24
                 TMC of water from Ragampet (V),near Kakatiya Canal, Choppadandi (M), Karimnagar District to
                 Motevagu Reservoir and Carrying by a Gravity Canal to existing Flood Flow Canal to feed Mid
                 Manair Reservoir with the Components such as Lined Gravity Canal, CM & CD Works, Lift,
                 Pressure mains and Lined Tunnels with all associated Civil, Hydro-Mechanical and Electro-
                 Mechanical works.

                 Replies to pre-bid queries and other corrections in bid document

                 Ref: Tender Notice No.15/2007-2008             Date: 22.03.2008



                 1.Querries of Maytas Hyderabad, Dt: 05-05-2008 and Replies.

                  Sl.      Clauses Reference              Clarification Sought                          Reply
                  No.     ( Tender document)
                  1      Vol-Clause20.0(i)Part-  Statements 1
pertaining to Organizational & to Bidders No change in clause. to 6 are not available in the Bid
                         I:    Eligibility    & document. We presume that it is a Typing           Information/ Data pertaining
                         Technical Stage         mistake.                                          to Bidders Organization and
                                                                                                   Managerial Capability,
                                                                                                   Financial Capability and
                                                                                                   Technical Capabilities are
                                                                                                   available in Format B2,
                                                                                                   FormatB6 and Format B8.of
                                                                                                   Vol I, Part – B-Formats.
                                                                                                   Corrigendum being issued
                  2      Vol-I-Clause              We presuming that the department will           No change in clause.
                         101.0Labour    Camp       provide land for contractors labor and staff    Bid condition holds good.
                         and Contractor’ Staff     colonies. Is it free or on chargeable basis.    The Land required for
                         Colony.                   Please Clarify                                  providing amenities will be
                                                                                                   given free of cost from
                                                                                                   Government         lands    if
                                                                                                   available, otherwise the
                                                                                                   Contractor shall have to
                                                                                                   make his own arrangements


                                                                                                   .
3   Vol-I,Appendix- OS-       We request the department to elaborate the     No change in clause.
    Other           Special   scope of work, where the plants are            Bid condition holds good and
    Conditions – Special      proposed to be planted                         is self explanatory.
    Conditions           of
    Contract,Clause
    No.33.
4   Vol-I,Part-E,Project      As we observed at site there is neither        Out of 146.24 TMC of water
    Profile-    Scope    of   existing storage reservoir and nor provision   drawn        from    Medaram
    Work,Sl No 1 & 4          in Package 7& 8.We request the authorities     Reservoir, 32 TMC of water
                              to specify the source from which water is to   is being lifted and dropped in
                              be drawn and location of reach starting        to Kakatiya Canal in Package-
                              point.                                         7. Balance 114.24 TMC of
                                                                             water is to be carried from
                                                                             Ragampet        (V)    towards
                                                                             Mothe Vagu Reservoir by
                                                                             continuing the tunnels of
                                                                             Package – 7.
Othe 2. Other Corrections to Bid Document


          S.No. Clause                    FOR                                   READ
                Reference


            1   EMD/Bid       Where ever “EMD Rs. 10.00 Crores      EMD Rs. 30.00 Crores
                Security      (Rupees Ten Crores)”                  (Rupees Thirty Crores)




            2   Vol-I-NIT-    PRANAHITA-CHEVELLA            LIFT    PRANAHITA-CHEVELLA LIFT
                Clause 30-    IRRIGATION SCHEME – Link-             IRRIGATION SCHEME – LINK- II
                Scope of      II- Package - 8 -          Detailed   -    PACKAGE-      8–Detailed
                                                                    Investigation , Designs and
                work, Part-   Investigation , Designs and
                                                                    Execution of Lift Irrigation
                D- Basic      Execution    of    Lift  Irrigation   Scheme for drawl and lifting
                Project       Scheme for drawl and lifting of       of 114.24 TMC of water
                Parameter     136.24 TMC of water from              from    Ragampet     (V),near
                s-Clause-     Ragampet      (V),near    Kakatiya    Kakatiya Canal, Choppadandi
                2.0- Scope    Canal,      Choppadandi        (M),   (M), Karimnagar District to
                of Work of    Karimnagar District to Motevagu       Motevagu     Reservoir    and
                this          Reservoir and Linking of existing     Carrying by a Gravity Canal
                Package,      Flood Flow Canal to feed Mid          to existing Flood Flow Canal
                Part – E –    Manair    Reservoir     with    the   to feed Mid Manair Reservoir
                                                                    with the Components such as
                Project       Components such as
                Profile –
                Scope of
                Work and
                wherever “                                           1) Drawl of 114.24 TMC of
                                1) Drawl of 136.24 TMC of           water from Ragampet (v)
                Scope of      water from Ragampet (v) near
                Work “ is                                           near Kakatiya Canal in 90
                              Kakatiya Canal in 90 days to          days to drop in Motevagu
                referred      drop in Motevagu Reservoir duly       Reservoir duly linking of
                              linking of existing Flood Flow        existing Flood Flow Canal
                              Canal to feed Mid Manair              to    feed    Mid   Manair
                              Reservoir.                            Reservoir.
                                                                    2) Excavation of Tunnels of
                              2)   Approach     channel   from      about 5.0 KM (Approx),
                              Ragampet (v) near Kakatiya            Surge       pool,     Adits,
                              Canal for required discharge and      Rockledge and Draft tube
                              length.                               tunnels     for    required
                                     discharge and length.
                                     3) Lining to Tunnel as per
                                     BIS Standards.
                                4) Lifting of 114.24 TMC of
                                water in 90 days with
3)    Construction  of   Intake static head of 109.10 M
Structures, Off Structures and (Approx) in Single Stage
Head Regulator.                 from Ragampet (V) near
                                Kakatiya Canal.

4) Excavation of Gravity Open Stage 1:
Channel including Formation of Total Discharge =419 Cumecs
Embankments        for  required Total Power in
discharge and length             MW=722(approx.)
5) Lining to Canal               No.of Pumps =Not more than
6) Construction of necessary CM 10 .
& CD works                       Discharge per pump in
7) Tunnel, Surge pool, Adits, Cumecs=41.90
Rockledge and Draft tube tunnels Static Head in Meters= 109.10
for required discharge and length
                                  Power/Motor in MW=72.20
8) Lining to Tunnel
                                  5) The Lift System has the
9) Lift                           following Components.
10) Lifting of 136.24 TMC of               a)   Approach
    water in 90 days with                  channel.
    required static head
                                            b) Pump House.
11) The lift system has        the
                                            c) Electro-
    following components.
                                               Mechanical
       a) Approach channel.                    works.
       b) Pump House.                       d) Hydro-
                                               Mechanical
       c) Electro-Mechanical
                                               works.
          works.
                                            e) Surge
       d) Hydro-Mechanical
                                               protection
          works.
                                            f) SCADA System
       e) Surge protection
                                            g) Staff   Quarters
12) Pressure mains to carry the
                                               for O & M
    required    discharge    for
    required length of about 1              h) Storage Shed
    Km
                                     5) Pressure mains to carry
13) Delivery Cisterns.               the required discharge for
                                     required length .
       With all associate Civil,
Hydro-Mechanical and Electro-            6) Delivery Cistern of
Mechanical works.                        suitable size and capacity.
14.Fabrication,            Supply,       7) Excavation of Gravity
   inspection    and       testing,      Open Channel up to Mothe
   Transportation,        Storage,       Vagu Reservoir including
   erection and Commissioning            Formationof Embankments
   of         Hydro-Mechanical           to carry 114.24 TMC of
   Equipment such as portals at          water in 90 days for a
   tunnel entrance and exit,             length of about 4.25 KM
   draft tube gates, gantry              (Approx).
   crane, trash rack and other
                                         8) Lining to Gravity Canal
   associated      civil     works
                                         as per BIS Standards.
   connected    with     the     lift
   scheme.                               9)    Construction    of
                                         necessary CM & CD works
15.Fabrication, supply, inspection
   and testing, Transportation,          10) Construction of Intake
   storage,       erection        and    Structures,    Off    take
   commissioning of Electro-             Structures    and    Head
   Mechanical Equipment such             Regulator.
   as pumps, pump auxiliaries            11) Lead Channel from
   motors,    motor      auxiliaries,    Mothe Vagu Reservoir to
   station auxiliaries like lift, EOT    Existing Flood Flow Canal.
   Crane, MOT Crane, DG Set,
   lighting       system,          Air   12) Lining to Lead Channel
   conditioning, Ventilation fire        as per BIS Standards.
   fighting system and other             Construction of necessary
   associated civil works with the       CM & CD works.
   lift schemes.
                                    14) Fabrication,     Supply,
16.Fabrication, Supply, Erection,       inspection and testing,
   Testing and Commissioning of         Transportation,
   220/11 KV Sub-Stations               Storage, erection and
   with associated items like           Commissioning         of
   breakers,               current      Hydro-Mechanical
   transformers,          Potential     Equipment such as
   transformers, capacity voltage       portals    at     tunnel
   transformers,         isolators,     entrance     and    exit,
   lighting     arresters,      all     draft    tube     gates,
   structures and stringing of          gantry crane, trash
   bus, earthing and all other          rack      and      other
   miscellaneous             works      associated civil works
   connected with 220/11 KV             connected with the lift
   sub-station under technical          scheme.
   supervision and certification
   of A.P Transco.                  15) Fabrication,     supply,
                                        inspection and testing,
17.It shall be ensured that the         Transportation,
   combined efficiency of motor         storage, erection and
   and pumps should be not               commissioning            of
   less than 89 %.                       Electro-Mechanical
                                         Equipment such as
18. Operation                and
                                         pumps,               pump
   Maintenance of civil works
                                         auxiliaries      motors,
   shall be for a period of 5
                                         motor          auxiliaries,
   (five) years, and for electro-
                                         station auxiliaries like
   mechanical      and    hydro-
                                         lift, EOT Crane, MOT
   mechanical works shall be for
                                         Crane, DG Set, lighting
   a period of 15 (Fifteen)
                                         system,                 Air
   years from the date of
                                         conditioning,
   completion certificate issued
                                         Ventilation fire fighting
   after successful completion of
                                         system      and      other
   the scheme.
                                         associated civil works
Miscellaneous items:                     with the lift schemes.
1. Preparation of land plan 16) It shall be ensured that
schedules & Land Acquisition          the combined efficiency
proposals on the basis of             of motor and pumps
approved alignment of Pipe line       should be not less
and    allied   works   including     than 89 %.
submergence       of   balancing
                                  17)        Operation        and
Reservoir.
                                  Maintenance of Civil works
2. Preparation of cost estimates shall be for a period of Five (5)
for all the components after years          and     for   Electro-
approval of designs and clubbing Mechanical        and     Hydro-
the items suitably for record     Mechanical works shall be for
measurement purpose.              a period of Fifteen (15) years
                                  from the date of completion
3. Formation of service roads in certificate     issued      after
the project area.                 successful completion of the
4.          All        necessary scheme.
permissions/clearances/              The bidder shall maintain the
approvals are to be processed        Civil works for five years.
and obtained by the firm only on     ( 3 years after defect liability
its own costs. As a user agency      period)       and        Electro-
this department will initiate the    Mechanical works for 15 years
proposals in respect of this         (13 years after defect liability
scheme.                              period) with the cost quoted by
                                     him separately in the financial
5. Providing              internal   bid and no extra payments will
   electrification and    lighting   be made for men, material and
   arrangements, beautification      machinery what so ever during
   and plantation near pump          this period. He shall maintain
   house and intake well.            this scheme with all standards
                                     and       specifications       of
6. Providing    drinking   water
                                     maintenance (conforming to
   regulating arrangements (Off-     relevant    BIS     Codes      of
   Take    Sluice)   to  enroute     practice) like, efficiency of
  villages.                       pumps and motors, regular
                                  servicing to Hydro and Electro-
                                  Mechanical items, carrying out
7. Design and preparation of      repairs/replacements        for
   engineering   drawings   for   trouble free operation, civil
   erection of hydro mechanical   maintenance like distempering
   works i.e., pumps, motors,     to superstructure, painting to
   Pressure mains etc.,           doors and windows, repair /
                                  replacements        of      AC
                                  sheets/ridge     pieces      of
8. Plantation along the gravity   godowns, maintenance of road
                                  ways and passages, up-keep
   canals,   Pipe  line, Pump
                                  of    pump      house     area,
   houses, and land scaping
                                  beautification and plantation,
   around pump houses.            maintenance of lawns and
                                  fountains etc.
                                  The bidder shall quote this
                                  item separately in financial bid
                                  and a separate agreement will
                                  be concluded for the same
                                  Miscellaneous items:
                                  1. Preparation of land plan
                                  schedules      &       Land
                                  Acquisition proposals on
                                  the basis of approved
                                  alignment of Pipe line and
                                  allied   works    including
                                  submergence of balancing
                                  Reservoir.
                                  2. Preparation of cost
                                  estimates for all the
                                  components          after
                                  approval of designs and
                                  clubbing    the    items
                                  suitably   for    record
                                  measurement purpose.
                                  3. Formation of service
                                  roads in the project area.
                                  4.        All     necessary
                                  permissions/clearances/
                                  approvals     are   to   be
                                  processed and obtained
                                  by the firm only on its
                                  own costs. As a user
                                  agency this department
                                  will initiate the proposals
                                                             in respect of this scheme.
                                                             5.Providing         internal
                                                             electrification and lighting
                                                             arrangements,
                                                             beautification           and
                                                             plantation     near    pump
                                                             house and intake well.


                                                             6.Providing drinking water
                                                             regulating    arrangements
                                                             (Off-Take      Sluice)  to
                                                             enroute villages.


                                                             7.Design and preparation
                                                             of engineering drawings
                                                             for erection of hydro
                                                             mechanical   works  i.e.,
                                                             pumps, motors, Pressure
                                                             mains etc.,


                                                             8.Plantation   along   the
                                                             gravity canals, Pipe line,
                                                             Pump houses, and land
                                                             scaping    around    pump
                                                             houses.


                                                             As above
                   Wherever Scope of Work – is
                   Referred in Bid Documents Vol –
                   I & II.




3   Vol-I-NIT-     Where ever, “Fabrication, Supply,         Deleted.
    Clause-30-     Erection, Testing and Commissioning
    Scope of       of 220/11 KV Sub-Stations with
    work-S.No-16   associated items like breakers,
                   current transformers, Potential
    Substations
                   transformers, capacity voltage
                   transformers, isolators, lighting
                   arresters, all structures and stringing
                   of bus, earthing and all other
                   miscellaneous works connected with
                   220 KV sub-station under technical
                    supervision and certification of A.P
                    Transco”.


4   Vol-1-NIT-      The    successful    Bidder      should   The successful Bidder should
    Clause-31-      however pay the EMD calculated @          however       pay the      EMD
    Special         2.5% of bid amount at the time of         calculated @ 2.5% of bid
    conditions-     signing the contract in the shape of      amount at the time of signing
    Sl.No.14.       demand draft or unconditional and         the contract in the shape of
                    irrevocable Bank Guarantee on the         demand draft or unconditional
                    standard format enclosed to the Bid       and       irrevocable      Bank
                    schedule for a total period not less      Guarantee on the standard
                    than the stipulated period of the         format enclosed to the Bid
                    completion of the work in question,       schedule for a total period not
                    plus 60 months defect liability period    less than the stipulated period
                    from the completion certificate.          of the completion of the work
                                                              in question, plus 24 months
                    The EMD of Rs. 10 Crores paid by
                                                              defect liability period from the
                    the successful bidder at the time of
                                                              completion certificate.
                    filing of bid through D.D or B.G will be
                    discharged after submission of EMD The EMD of Rs. 30 Crores
                    calculated at 2.5% of bid.               paid by the successful bidder
                                                             at the time of filing of bid
                                                             through D.D or B.G will be
                                                             discharged after submission of
                                                             EMD calculated at 2.5% of bid.




5   Vol-1-NIT-      The retention amount from the bills       The retention amount from the
    Clause-31-      will be deducted at the rate of 7.5%.     bills will be deducted at the
    Special                                                   rate of 7.5%(Seven and half
    conditions-                                               percent Only) as usual which
    Sl.No.16.                                                 may be released on request of
                                                              the Agency in multiples of
                                                              25/50 Lakhs on production of
                                                              valid BGs. However, the final
                                                              retention of 2.5% will be in
                                                              cash only as per Tender
                                                              Reforms issued.
6   Vol-1-2. ITB-   Bidder/Partners of Joint venture(JV)      Bidder/Partners     of  Joint
    Clause-1.5      firm have not been blacklisted in any     venture(JV) firm have not
                    department in A.P                         been blacklisted in any
                                                              department      any    where
                                                              previously.
7    Vol-1-2. ITB-    That Bidder/ Partners of Joint Venture    Deleted
     Clause-1.5       (JV) firm have not been demoted to
                      lower category in any department in
                      A.P. FOR NOT FILING THE BIDS
                      AFTER BUYING BID SCHEDULES
                      IN A WHOLE YEAR AND THEIR
                      Registration have not been cancelled
                      for a similar default in two
                      consecutive years.




8    Vol-I- 2.ITB-   Bidder shall submit only one Bid for the   Electro-Mechanical
     Clause 6.0      work in response to invitation for         Manufacturer can be JV
                     bidding. Any bidder who submits or         partner in more than one JV.
                     participates in more than one bid will
                     be disqualified and will also cause the
                     disqualification of the consortium/joint
                     venture company in which is a member
9    Vol-I- 2.ITB-    Sl No.6- Service Tax at 2.04% on          Sl.No.6- Service tax at 4.12 %
     Clause 18.0-     items applicable.                         on items applicable.
     Special
                      Note:2 Central Sales tax and Excise       Note: 2 The bid offer shall be
     Attention-
                      duty are placed beyond the scope of       exclusive of Excise and
     Sl.No18.1-
                      this bid and will be reimbursed on the    custom duty. They shall be
                      production of evidence of payment.        reimbursed on production of
                                                                evidence by the Agency for
                                                                having paid such amount to
                                                                the competent authority.


10   Vol-             Information/ Data pertaining to           Information/ Data pertaining to
     Clause20.0(i)    Bidders Organization, , Financial         Bidders Organization and
     Part-I:          Capability and Technical Capability as    Managerial          Capability,
     Eligibility &    per statements 1 to 6 ,Vol - I Part-C.    Financial    Capability    and
     Technical                                                  Technical Capabilities as per
     Stage                                                      Format B2, Format-B6 and
                                                                Format- B8.of Vol I, Part – B-
                                                                Formats.
11   Volume-1-       In respect of cement and steel price     In respect of cement and steel
     Part A- D.      adjustment    will be made for the       price adjustment will be made
     Cost Control-   actual quantity used in the work for     for the actual quantity used in
     Clause.46-      increase or decrease of prices by        the work for increase or
     Price           more than 5% over current rates ( As     decrease of prices by more
     Adjustment.     approved by the Board of Chief           than 5% over current rates (
                     Engineers) of Rs.4300 /- per M.T.        As approved by the Board of
                     and Rs. 38,950 /- per M.T. for cement,   Chief Engineers) of          Rs.
                     and M.S plates respectively. For the     4400 /- per M.T., Rs.41500/-
                     purpose of assessing the increase        per MT and Rs.46000/- per
                     and decrease the rates, of cement        M.T. for Cement, Steel bars
                     and steel as approved by the Board of    (HYSD) and M.S plates
                     Chief Engineers communicated by the      respectively.         For     the
                     Engineer-in-Chief, Irrigation Wing,      purpose of assessing the
                     I&CAD Dept., from time to time will be   increase and decrease the
                     adopted                                  rates, of cement and steel as
                                                              approved by the Board of
                                                              Chief                Engineers
                                                              communicated         by       the
                                                              Engineer-in-Chief,     Irrigation
                                                              Wing, I&CAD Dept., from time
                                                              to time will be adopted

12
     Vol-I-D. Cost
     Control-        The above advance shall bear an          The above advance shall bear
     Clause No-      interest of 12% per annum. The           borrowing rate of Interest as
     49.4            interest on the amounts paid as          approved by the Government
                     advance is chargeable from the date      of A.P from time to time. The
                     the amount is paid. However if           interest on the amounts paid
                     completion      is     delayed     by    as advance is chargeable
                     circumstances beyond control of the      from the date the amount is
                     contractor for which an extension has    paid. However if completion is
                     been granted by the Executive            delayed by circumstances
                     Engineer / Superintending Engineer       beyond     control    of   the
                     the interest charges on such             contractor for which an
                     advances shall be waived for the         extension has been granted
                     period of extension.                     by the Executive Engineer /
                                                              Superintending Engineer the
                                                              interest charges on such
                                                              advances shall be waived for
                                                              the period of extension.
13   Vol-I-Special   Superintending Engineer, SRSP-             Superintending      Engineer,
     Conditions of   FFCCircle-1,Jagtial, Karimnagar Dist.      Sripada Yellampally Project
     Contract-                                                  Circle, Mancherial, Adilabad
     Clause-10.2-                                               Dist.
     Designs and
     drawings.
14   Vol-I-          From Commercial Operation Date of          From Commercial Operation
     Appendix-       the Project, the Contractor shall take     Date of the Project, the
     OM-Terms        over the Pump houses and the               Contractor shall take over the
     and             Pipeline for operation maintenance for     Pump houses and the Pipeline
     conditions-     a period of two years. The Contractor      for operation maintenance of
     Clause-1.0-     shall be responsible for the operation     civil works for a period of 5
     General         and maintenance of all components of       (Five) years. The Contractor
                     the Project including associated           shall be responsible for the
                     hydro-mechanical equipment and civil       operation and maintenance of
                     works in accordance with prudent           all components of the Project
                     utility practice.                          including associated hydro-
                                                                mechanical equipment for a
                                                                period of 15 (Fifteen) years in
                                                                accordance with prudent utility
                                                                practice.


                     To      provide   all  spare   parts,      To provide all spare parts,
15   Vol-I-                                                     tools,equipment,consumables
     Appendix-       tools,equipment,consumables      etc.
                     required to operate and maintain the       etc. required to operate and
     OM-Terms                                                   maintain    the   project    in
     and             project in accordance with prudent
                     utility practice and keeping in view       accordance with prudent utility
     conditions-                                                practice and keeping in view
     Clause-2.0-     warranty period.
                                                                warranty period for trouble
     Scope of                                                   free O&M for Fifteen (15)
     services-                                                  Years.
     Sl.No.10.
16   Vol-I-          The Contractor shall obtain and            The     Contractor     shall
     Appendix-       maintain in force throughout during        obtain and maintain in
     OM-Terms        Two (2) years of operation and             force throughout during
     and             maintenance, Industrial All Risk           Five    (5)      years     of
     Conditions-     Insurance for the Project providing full   operation               and
     Clause-10-      coverage on replacement value basis.       maintenance, Industrial All
     Insurance.      Covered peril shall include fire, flood    Risk Insurance for the
                     and allied perils.      Insurance for      Project    providing     full
                     workers against injury and death as        coverage on replacement
                     per Workman Compensation Act shall         value basis. Covered peril
                     also be obtained by the Contractor.        shall include fire, flood
                                                                and       allied      perils.
                                                                Insurance for workers
                                                                against injury and death
                                                                as      per        Workman
                                                                Compensation Act shall
                                                                also be obtained by the
                                                                Contractor.


                     Upon completion of Two (2) years of        Upon completion of Five
                     Kharif O&M period,the acceptance           (5) years of Civil works
17   Vol-I-
                     tests shall be carried out before the      O&M              period,the
     Appendix-
                     period is taken over by the                acceptance tests shall be
     OM-Terms
                     Employer.These acceptance tests            carried out before the
     and
                     shall be identical to the test after       period is taken over by the
     Conditions-
                     completion conducted under the EPC         Employer.These
     Clause-13-
                     portion of the contract, except that the   acceptance tests shall be
                     minimum condition shall be agreed          identical to the test after
                     performance value from the EPC test        completion       conducted
                     reduced by the percentage value of         under the EPC portion of
                     contractual acceptance degradation         the contract, except that
                                                                the minimum condition
                                                                shall       be      agreed
                                                                performance value from
                                                                the EPC test reduced by
                                                                the percentage value of
                                                                contractual     acceptance
                                                                degradation


                            The Contractor shall also make           The Contractor shall
                     available the proof that maintenance/      also make available the
                     overhaul of equipment was carried out      proof that maintenance/
                     during TWO (2) successful years of         overhaul of equipment
                     Kharif years‟ period in accordance         was carried out during
                     with the maintenance schedule of the       Fifteen (15) successful
                     supplier of the equipment                  years of O&M period for
                                                                Electro-Mechanical    and
                                                                Hydro-Mechanical         in
                                                                accordance      with   the
                                                                maintenance schedule of
                                                                the    supplier    of the
                                                                equipment




     Vol-I-Bill of   The contractor would be permitted to       The contractor would be
18   quatntities-    use the excavated useful soils and         permitted to use the
     Preamble-       stone for construction purpose. Soils      excavated useful soils and
     Clause.25       used for construction either for           stone for construction
                     homogenous section in hearting or in       purpose. Soils used for
                     casing zone based on the suitability       construction either for
                     will be at free of cost and the cost of    homogenous section in
                     stone used for construction purpose        hearting or in casing zone
                     will be recovered from the contractor‟s    and the stone used for
                     bill. The contractor should quote his      construction       purpose
                     bid price keeping in view of the above based on the suitability
                     aspects.                               will be at free of cost. The
                                                            contractor should quote
                                                            his bid price keeping in
                                                            view of the above aspects.
                                                            However         Seigniorage
                                                            charges etc., will be
                                                            recovered as usual,as per
                                                            Cl.104 of Other General
                                                            Conditions of Vol. I of Bid-
                                                            document.


     Volume-1-
     Part-D-Basic    The Objective of this Package work is   The Objective of this
19
     Project         lifting of 136.24 TMC of water from     Package work is Drawl of
     parameters-     Ragampet(V)        ,near    Kakatiya    114.24 TMC of water
     Clause-1.0-     Canal,Choppadandi(M)      Karimnagar    from Ragampet (v)
     Objective       District to Mothe Vagu Reservoir by     near Kakatiya Canal in
                     water conveyor system with all
                                                             90 days to drop in
                     associated components
                                                             Motevagu       Reservoir
                                                             duly linking of existing
                                                             Flood Flow Canal to
                                                             feed     Mid     Manair
                                                             Reservoir    by    water
                                                             conveyor system with all
                                                             associated components.


     .                                                       .
20                   .
     Volume-1-                                                   1) Lifting of 114.24
     Part-D-Basic           1) Lifting of 136.24 TMC               TMC of water in 90
     Project                   of water in 90 days in              days    in   Single
     parameters-               Single Stage      from              Stage         from
     Clause-2.0.1-             Ragampet     (v)  near              Ragampet (v) near
     Main                      Kakatiya Canal                      Kakatiya Canal
     Components.            2) Gravity Lined Canals and          2) Gravity        Lined
                               Link Canals to existing             Canals    and    Link
                               FFC including formation of          Canals to existing
     .                         embankments           with          FFC         including
                               discharge capacity of 500           formation           of
                               Cumecs.                             embankments       with
                            3) Lined Tunnels, Surge                discharge capacity of
                               pool, Adits, Rockledge              419.00 Cumecs
                               and Draft tube tunnels 3)    Lined     Tunnels,
                               for required discharge Surge     pool,   Adits,
                               and length.            Rockledge and Draft
                                                      tube     tunnels     for
                                                        required discharge and
                           4) CM & CD works for Gravity length.
                              Canals.                     4) CM & CD works
                                                          for Gravity and Lead
                                                          Channels.




                      .”



                                                               .
                                                               .




21   Volume-1-        The detailed investigation of Main       The detailed investigation
     Part-E-Project   Canal alignment about 12.500 Km          of Gravity Canal alignment
     Profile-         (approx.) and lined Tunnels of about     about 4.25 Km (approx.)
     System           9.00 Km (Approx.) to carry capacity of   and lined Twin Tunnels of
     Requirements     500 Cumecs. and H.Ps. are to be got      about 5.0 Km (Approx.) to
     -A.              approved by the competent authority.     carry capacity of 419
     Investigation-                                            Cumecs and H.Ps. are to
     Sl.No.3                                                   be got approved by the
                                                               competent authority.
 22   Volume-1-        The proposed Main Canal is to run         The proposed Gravity
      Part-E-Project   about 3.0 Km (approx) length.The          Canal is to run about 4.25
      Profile-         Main canal proposed is lined Canal        Km (approx) length.
      System           and runs with FSL cutting as far as
      Requirements     possible.
      -B. Design-
      Sl.No.4

                                                                 The proposed Gravity
 23                    Excavation of Main Canal of about
      Volume-1-                                                  Canal is to run about 4.25
                       3.0 Km (approx) as per approved
      Part-E-Project                                             Km (approx) length.
                       Hydraulic particulars.
      Profile-
      Gravity
      Canals


                                                                 The scope of work for this
                       The scope of work for this bid is for
                                                                 bid is for the reach from
 24   Vol.II-Section   the reach Kakatiya Canal near
                                                                 Kakatiya Canal near
      C-01-Clause      Ragampet (V) to Mothe Reservoir and
                                                                 Ragampet (V) to Mothe
      1.2.2-           linking of existing FFC for a length of
                                                                 Reservoir and linking of
                       about 12.50Km (approx).
                                                                 existing FFC by Tunnels
                                                                 and Gravity Canals.




                                                                 Discharge : 419 Cumecs
                       Discharge : 500 Cumecs                    Lift head ( Static) :
      Vol.II-Section
                                                                 109.10m(approx.) in single
25    EM 01-Clause     Lift head ( Static) : 30m (approx.)
                                                                 stage.
      1.2-
      Hydraulics &
      Other data.


                                                                 Capacity and No.of pumps
 26   Vol.II-Section   The Pump shall be capable of giving       shall be selected and
      EM 01-Clause     rated discharge of 500Cumecs at total     designed such that the
      1.3- Pump-       static head of about 30 M(approx) in      Pump shall be capable of
      Motor-Type       two stages at different locations .       giving rated discharge of
      and Rating                                                 419 Cumecs at total static
      Sl.No.ii.                                                  head of about
                                                                 109.10M(approx) in single
                                                                 stage at Kakatiya Canal
                                                                 near Ragampet (V)
                                                                Deleted.
     Vol-II-Part-C-   The Clause 1.14- Casing and Stay          However, Spiral and
     EM01-Clause-     Column.                                   Guide vane system along
27
     1.14..                                                     with water depression
                                                                system arrangements to
                                                                be made available.




                                                                A stay ring of fabricated
                                                                welded carbon plate steel
     Vol-II-Part-C-                                             shall be provided between
              A Sta A stay ring of fabricated welded carbon     the regulating ring and the
28   EM01-Clause-
                     plate steel shall be provided between      draft tube cone. The ring
     1.17..
                     the regulating ring and the draft tube     shall be furnace stress
                     cone. The ring shall be furnace            relived. A man hole with
                     stress-relieved. It shall be made          bolted cover for access
                     spherical over a portion to minimise       shall be provided in the
                     clearance to runner blades. .              discharge ring. Guide
                             The stainless steel overlay        vane apparatus to be
                      shall be made at the portion of the       provided with necessary
                      inside surface surrounding the runner.    OPU and governing
                                                                mechanism with
                                A man hole with bolted cover    Servomotor, for effective
                      for access shall be provided in the       drainage of shaft seal
                      discharge ring. Suitable provision        leakages, two nos. A.C.
                      shall be made for gravity drainage of     submergible motor sets
                      leakage water at least two opposite       along with necessary level
                      stay vanes. Additionally, for effective   controllers for auto
                      drainage of shaft seal leakages, two      start/stop of pumps shall
                      nos. A.C. submergible motor sets          be provided. One set of
                      along with necessary level controllers    additional level switches
                      for auto start/stop of pumps shall be     shall be provided for high
                      provided. One set of additional level     level and very low level
                      switches shall be provided for high       alarms in control room.
                      level and very low level alarms in
                      control room.
                                                                Slip joint/Dismantling joint
                                                                shall be provided as
29   Vol-II-Part-C-   Discharge valve-valve body-Slip           required for dismantling of
     EM01-Clause-     joint/Dismantling joint-not furnished.    valve without dismantling
     1.25.
                                                                other arrangement.
                                                               Ultrasonic type
30   Vol-II-Part-C-   Pressure transducer type
     EM01-Clause-
     1.32.5




31   Vol-II, Part-C   Four Nos. of suitable type pumps         Not more than 10 (Ten)
     Specification    each for discharging not less than 125   Nos. of suitable type
     for Electro-     Cumecs of water.                         pumps each for
     Mechanical                                                discharging not less than
     work-Pump,                                                41.90 Cumecs of water.
     clause-1.40,
     Schedule of
     requirement.

                      Schedule of requirements-Spares for
32   Vol-II/Part-C                                             Spares shall be supplied
                      5 years-not furnished.
     /Section                                                  for 5 years of trouble free
     EM01                                                      operations.
33   Vol-II, Part-C   Motors should be capable of starting         Motors       should       be
     EM03 B           by adopting suitable soft starters to      Capable of starting by
                      limit the starting current to less than    adopting Suitable Soft
                      twice the full load current of the motor   starters to limit the starting
                      and limiting the voltage dip in the        current of the motor and
                      system within the permissible limits       limiting the voltage dip in
                      based on the prevailing fault levels of    the system within the
                      the power system at the location.          permissible limits based
                                                                 on the prevailing fault
                                                                 levels of the power system
                                                                 at the location.
                                                                 Three Sets of starting
                                                                 equipment of suitable
                                                                 capacity capable to start
                                                                 any motor with any set
                                                                 shall be supplied along
                                                                 with necessary valves,
                                                                 compressors and tanks to
                                                                 dewater      the  runner
                                                                 chamber of the pump
                                                                 during starting shall be
                                                                 provided for smooth start
                                                                 of the pump.
                                                                      Starters shall be of
                                                                 LCI/SFC type. If however
                                                                 the bidder provides other
                                                                 types technically proven
                                                                 and suitable, then it shall
                                                                 be done with the prior
                                                                 approval      from       the
                                                                 employer and conditions
                                                                 including    price      etc.,
                                                                 prescribed at the time of
                                                                 approval shall prevail.




34   Vol-II, Part-C   Protective Relaying Equipment –            If   Protective Relaying
     EM03             Numerical type- Redundancy not             equipment is of numerical
     B/Clause4.2(a    furnished.                                 type    they   shall  be
     )                                                           configured           with
                                                                 Redundancy.
35   Vol-II, Part-C    Where ever “Segregated phase”               Isolated phase
     EM06-Clause
     6.1




36   Vol-II, Part-C    One set of 220 V DC Batteries of 500   Two (2) sets of 220 V DC
     EM12-Clause-      AH and One set of 24 V DC Batteries    Batteries of 500 AH and
     12.0              of 500 AH                              Two(2) set of 24 V DC
                                                              Batteries of 800 AH

37   Vol-II, Part-C
     EM15-Clause-
                             One no. 250 KVA D.G.Set          Two(2) sets of 500 KVA
     15.1
                                                              D.G.Set or 315 KVA
                                                              D.G.Set
38   Vol-II-Part D-    220 KV Double Circuit Transmission     Deleted.
     220 KVDC          Line
     Transmission
     Line




39   Vol-II, Part-A;               Not furnished              Furnished as addendum -I
     Section C-20,
     C-21 and
     Annexures
     AC 01 to AC
     05




40   Vol-I-            Mile stone Programme.                  Now furnished as
     Annexure-I                                               Addendum-2
                       Not furnished.




41   Vol-I-            Schedule of Payment.                   Now furnished as
     Annexure-II                                              Addendum-3
                       Not furnished.
     C.Financial   1. The bidder/firm/company/JV on his      1.The
     Requirement   name should have minimum annual           bidder/firm/company/JV
42
                   financial turnover in all civil /         on his name should have
     of Vol.I      mechanical /electrical engineering        minimum annual financial
                   works executed of value not less          turnover in all civil /
                   than the Rs. = (Approx value of work      mechanical/electrical
                   in Rupees/No. of years prescribed for     engineering          works
                   completion), in any one year during       executed of value not
                   the last five years.                      less than the Rs. =
                                                             780.13 Crores      in any
                                                             one year during the last
                                                             five years..


                   2. The bidder/firm/company shall          2.                    The
                   demonstrate that a single entity /        bidder/firm/company shall
                   each member of JV or consortium           demonstrate that a single
                   has an adequate bank credit plan to       entity / each member of
                   meet the aggregate fund requirement       JV or consortium has an
                   of the project i.e., not less than Rs.=   adequate bank credit
                   (Approx. value of work in rupees x        plan     to   meet     the
                   0.25/No. of years prescribed for          aggregate            fund
                   completion) in the proforma enclosed      requirement of the project
                   to the bid documents.                     i.e., not less than Rs.=
                                                             195.03 Crores in the
                                                             proforma enclosed to the
                                                             bid documents.
                   3.The bidder / firm / company on his      3.The bidder / firm /
                   name should have satisfactorily           company on his name
                   completed similar works i.e., work        should have satisfactorily
                   of Pumping stations / Hydro power         completed similar works
                   stations / pressure mains / power         i.e., work of Pumping
                   plant water system of value not less      stations / Hydro power
                   than the value equivalent to Rs. =        stations / pressure mains
                   Approx value of work in Rupees/No         / power plant water
                   of years prescribed for completion) x     system of value not less
                   25%, in the last seven years and          than the value equivalent
                   should be running successfully for at     to Rs. = 195.03 Crores
                   least two years.                          in the last seven years
                                                             and should be running
                                                             successfully for at least
                                                             two years.
                                        ADDENDUM-1



                                      SECTION - C 20

  EXCAVATION OF TUNNEL/ DRAFT TUBE TUNNEL/ INCLINED
                      SHAFTS

20.1 SCOPE OF WORK:

   i)      The specifications described hereunder cover all labour, materials, tools and plants,
           equipment and machinery related to the work of Excavation of Tunnel, (i.e., under
           ground excavation) transportation and stock piling of muck, disposal of muck into
           dumping areas as approved by the Engineer-in-Charge.

   ii)     The Excavation shall be made to the lines and dimensions shown on the drawings
           approved for construction or other wise agreed with the Engineer-in-Charge

   iii)    This under ground excavation shall be done by smooth blasting methods including
           loading, conveying and disposal of the excavated rock spoil, preparation and
           maintenance of haul roads, ventilation, lighting, supporting and safety measures
           communication systems, dewatering etc., as approved by the Engineer-in-Charge.

20.2 SUBMISSIONS:

20.2.1    Before initiating the tunnel excavations, the Contractor shall prepare drawings and
          sketches showing the construction system proposed to be utilized as well as a list of
          equipments and its characteristics, personnel and their qualifications and shall furnish
          the same to the Engineer-in-Charge for approval.

20.2.2    The Contractor shall submit for the approval of the Engineer-in-Charge, the schedule
          that he proposes to follow for several excavation fronts, together with a complete
          description of the sequence of the different rounds, diagrams of distribution and depth
          of holes and quantities, type and power of explosives that he is going to use, as well as
          ignition sequence, type and class of detonators, estimated consumption of explosives
          per Cubic meter of excavation and all other pertinent data that allows the Engineer-in-
          Charge to be acquainted with the working procedures and the equipment to be used.

20.2.3    Prior to beginning any work of excavation the Contractor shall submit, for approval, a
          disposal area plan consistent with the drawings. The plan shall show in addition to the
          proposed location and size of waste piles, the Contractor‟s plan for excavation
          describing the sequences and manner in which the material will be handled. Approval
          of the Contractor‟s plan by the Engineer-in-Charge shall not relieve the Contractor from
          full responsibility for the adequacy of this programme.

20.3 EXCAVATION OF ROCK:

20.3.1    The rock excavation shall be carried out to the sections, lines and grades as indicated
          in the drawings approved for construction or as directed by the Engineer-in-Charge.
          Blasting of rock shall be carried out using explosives most suited to the type of rock
          met with and permitted by the Engineer-in-Charge, so as to avoid undue over break.
             The rock faces shall be trimmed so that there are no projections beyond the lines
             marked on the sections. Blasting shall be carried out at fixed times of the day and all
             necessary safety measures shall be strictly enforced as stipulated in the section 17 of
             Technical specifications.

20.3.2       All excavations shall be so done that the rock around the periphery of the excavated
             final sections shall not be shattered, loosened or other wise weakened. Large over
             breaks shall be avoided by suitable means such as light charges, ream hole or similar
             measures. The cost of these measures shall be considered as included in the
             accepted rate of excavations.

20.4 SETTING OUT OF TUNNEL:

         The tunnel shall be excavated true to line and grades as indicated on the drawings
         approved for construction. The line shall be set out by the Contractor at his cost and risk,
         utilizing the permanent bench marks and station points fixed by the Engineer-in-Charge.
         Such lines will be checked by the Engineer-in-Charge or his Assistants. The Contractor
         shall provide all the facilities for such check being exercised, but this shall no way absolve
         him from the responsibility of the accuracy of lines and grade. If the execution has been
         done to incorrect line or grade, the Contractor shall rectify all such mistakes at his own cost
         and any unnecessary excavation done shall be filled back by the Contractor in Cement
         Concrete M20 or as directed by the Engineer-in-Charge.

         If the Contractor find it necessary either for the purpose of ventilation or to attain the
         necessary speed of the work, to sink any shafts or drive any additional adits than shown in
         the approved drawings, he shall not be paid for and the Contractor shall have to plug
         these back at his own risk and cost with such materials and in a manner as may be
         directed by the Engineer-in-Charge.

         Bore holes are to be drilled to ascertain the geology of the rock expected in the
         excavations and the treatment if any required during execution shall be clearly discussed
         before approval of the drawing.

         The Contractor shall excavate sumps in the Tunnel as may be required after approval of
         the Engineer-in-Charge.

         In special location and close to profile lines where specifically ordered by the Engineer-in-
         Charge, the use of explosives shall be discontinued and the rock excavated by line drilling,
         broaching, barring, chiseling or wedging etc., as may be approved by the Engineer-in-
         Charge.

20.5 DRILLING:
     Drilling shall be done by the wet drilling method.

20.6 TRIMMING OF FACES:

         After blasting, the whole area of excavation shall be carefully examined, and all loose rock,
         projections etc., removed in such a way that there shall not be any danger of any pieces of
         rock falling down, subsequently due to any cause what so ever. After the section is
         excavated it shall be carefully trimmed by using light explosives, if necessary to remove
         any projection that may be found within the boundaries defined by the minimum excavation
         lines.
20.7 INTERMEDIATE CONCRETING:
      When ever the Engineer-in-Charge considers that it is necessary to protect weak rock by
      placing the concrete lining in part or in full, immediately the Contractor shall carry these
      works.



20.8 ASSISTANCE FOR VERIFICATION:

          No distinction shall be made on account of the materials being wet or dry. The quantities of excavation shall be measured as
          solid excavation in site.


          The Contractor shall provide suitable rig or any other approved equipment and make all necessary arrangements to the
          satisfaction of the Engineer-in-Charge for moving the rig along the alignment and grade of the tunnel, shafts etc., to check
          dimensions of the minimum excavation lines, as and when required by the Engineer-in-Charge.


20.9 SUPPORTS AND GENERAL SAFETY REQUIREMENTS:

            The Contractor shall take full responsibility for the safety of all underground excavations.
            He shall also be responsible for the adoption and fulfilling of all necessary measures to
            protect his workers from slides and cave-ins from the roofs, walls or at the work fronts,
            fortuitous explosions, intoxications, traffic accidents, electric discharges and all accidents
            of probable occurrence in the excavation works. The Contractor shall take all
            precautions necessary for the above safety measures. Lack of compliance with any
            safety measures or requisites indicated herein shall be sufficient cause for the Engineer-
            in-Charge to suspend the work until the causes that lead to the suspension are
            remedied. The Contractor shall have no right to claim extension or compensation for this
            reason. Dust resulting from drilling shall be avoided by using water and using forced
            ventilation. At any sections of the tunnels where the rock met with its unstable, shall be
            permanently supported in an intermittent or continuous way by means of steel supports
            with permanent or temporary laggings placed as required by local conditions, with the
            prior approval of Engineer-in-Charge.

            In areas where supporting by means of shotcreting using Dramix Steel fibers and rock
            bolts is required, the same shall be provided as expeditiously as possible and as directed
            by the Engineer-in-Charge. As soon as the Contractor meet with such situations, he
            shall report to the Engineer-in-Charge and obtain his orders.

20.10 EQUIPMENT:

            Electrical, pneumatic or diesel equipment can be utilized for the different operations
            involved in the excavation of tunnels. Gasoline-powered equipment shall not be
            permitted in tunnels or underground works. In case the diesel equipment is used, the
            Contractor shall provide the necessary facilities to remove all obnoxious gases, resulting
            from the operation of the equipment. The equipment shall have inbuilt scrubber to keep
            down emission of obnoxious fumes to the minimum. If the diesel gas removal system is
            not adequate, the Engineer-in-Charge may order the suspension of all operations till the
            necessary measures to correct the defects of ventilation system are taken. No claim in
            this regard shall be allowed.

20.11 LIGHTING:

20.11.1      For each tunnel, shaft etc., the Contractor shall provide a lighting system which shall be maintained in operation during
            the execution of the respective work. Besides the general lighting system, he shall provide special lighting for the
            excavation front, where any work is being executed or where it is necessary to inspect a part of the work. This lighting
            system shall be integrated by flood lights or any other type approved by the Engineer-in-Charge. Energised wires or
          lamps, bulbs shall not be permitted in the immediate vicinity of the work front at the time of charging and blasting.
          Lighting of flame shall not be permitted in any section of the work unless the Engineer-in-Charge authorizes it for specific
          working conditions. All the roadways/tunnels through which persons pass should be kept effectively white washed within
          100m from their farthest face. Particular care should be taken to places including junctions siding, bye-pass, engine room
          place containing motor/ or other apparatus, first aid station etc.,


20.11.2 All power and lighting wires shall be installed and maintained in optimal conditions of
        insulation and safety confirming to the Indian Electricity Rules 1956 of Government of
        India. Power and lighting wires shall be installed on one side of the tunnels, shafts and
        caverns and the detonator wires shall be installed on the opposite sides and at sufficient
        distance from telephone or wires of communication system.

20.11.3 All electrical cables, wires shall be firmly fixed on excavated walls, by means of
        insulators of adequate design and capacity and their installation shall be made in such a
        way that wires do not get damaged during excavation works. The Contractor shall
        provide sufficient lighting to ensure the following, in all places where work is in progress:

    1. Safe working conditions are provided for the Contractor‟s personnel, other Contractor‟s
       employees, personnel of the Engineer-in-Charge, occasional visitors etc
    2. The work can be constructed in complete compliance with the Contract.
    3. A complete inspection of all works in progress can be made by the Engineer-in-Charge.

20.11.4 Unless otherwise directed by the Engineer-in-Charge the minimum service illuminance on
        ground or working surface to be provided for the various operations or work areas shall
        be as tabulated below:

           Operation or Area                                                                            Illuminance
                                                                                                        Minimum measured
                                                                                                        value lux
           Access and haul roads where cross traffic or other hazardous                                 10
           conditions exist
           Bridges                                                                                      10
           Concrete placing                                                                             50
           Underground works (Working faces)                                                            50
           Junction                                                                                     15
           Operator‟s cabin of machines                                                                 30
           Maintenance shops and auxiliary buildings                                                    200
20.11.5    The Contractor shall supply a suitable instrument to the Engineer-in-Charge for
          measuring the intensity of illumination. The instrument shall comply with BS:667
20.11.6     Illumination for areas or operations not listed in the above table shall conform to the
          requirements of the lighting guide, building and civil engineering sites (illuminating
          Engineering Society, London)
20.11.7 All mobile equipment or plant used during night operations or in underground shall be
        equipped with sufficient lights and reflectors to ensure safe working conditions.
20.11.8 Not less than 14 days before the start of tunneling or night operations, the Contractor
        shall submit his proposals for lighting in the tunnels, shafts and caverns and in the areas
        in which he proposes to work at night to the Engineer-in-Charge. The Contractor shall
        modify the proposals if required by the Engineer-in-Charge and shall not begin
        operations at night or in underground as the case may be, until the proposals for lighting
        (in an amended form if required) have been approved. Approval of the Contractor‟s
        proposals for lighting shall not relieve the Contractor of any of his liabilities or obligations
        under the Contract.
20.12 VENTILATION:
20.12.1 The Contractor shall furnish and install in each one of the underground work fronts and in
        each tunnel, a ventilation system which will be maintained in operation during the time in
        which work is being executed. The ventilation equipment and ducts shall be of good
        quality so that a continuous service is guaranteed, have an adequate capacity and be
        firmly fixed and sufficiently strong to withstand the work pressures. The tail end of the
        ventilation duct shall be taken to a place as close to the work as allowed by the blastings.
        Thereafter arrangement for supplying fresh air at the face for effective an quick clearance
        of blasting fumes, gases etc., a flexible extension pipe shall be used. The Contractor
        shall submit for the approval of the Engineer-in-Charge, all ventilation drawings and
        general layout indicating the number of fans and their capacity before initiating any
        underground work. The Contractor shall not work without this approval which however
        does not relieve him from his obligation to provide sufficient fresh air for underground
        work. If during the execution of the work, it is found, in the opinion of the Engineer-in-
        Charge, that the capacity of the ventilation system is inadequate for the good health of
        the workers and for removing the gases as prescribed below, the Engineer-in-Charge
        may order the Contractor to install additional fans and take all necessary measures to
        obtain the desired results. Adequate arrangement should be made to circulate as much
        quantity of air upto the site of blasting as to ensure after every round of blast dilution of
        co and oxides 50 PPM and 5 PPM respectively within a period of 5 minutes. It should be
        ensured that at every place where persons are required to work or pass, the air does not
        contain less than 19.5% oxygen or more than 0.5% of carbon dioxide or any obnoxious
        gas present in quantity likely to affect the health of any person. The Contractor shall
        have no right to any compensation or to term extensions for this reason.
20.12.2 The carbon monoxide (CO) content and the percentage of the oxygen in the air shall be
        measured and checked regularly after half an hour of each blasting and once between
        the two consecutive blastings. If the CO content in the air exceeds 50 PPM or the
        percentage of the oxygen in the air is less than 19.5% at any place, the reduced rate
        shall be given for the item of excavation as under:
20.12.3 If CO content is between 50 to 60 PPM the excavation rate shall be reduced by 10% and
        if oxygen content is between 19.5 to 19%, the excavation rate shall also be reduced by
        10%. The work shall be stopped after the CO content exceeds 60 PPM and the
        percentage of oxygen reduced below 19%. In case of persistent failure to adhere to the
        standards and requirements laid down above, the Engineer-in-Charge will be free to take
        either of the following two actions at his own option: (1) install and operate at the cost
        and risk of the Contractor, such supplementary ventilation facilities as he may deem
        necessary, or (2) terminate the Contract after giving the due notice.

20.12.4 The ventilation provided for each work front shall furnish sufficient fresh air for all the
        personnel in the underground in order to avoid a concentration of contaminants
                                                                                         3
        dangerous for the health and lives of the workers and supervisors. At least 5 m /min/bhp
        of air should be circulated in the roadways where the diesel equipment is in use. In
                                                                 2
        normal approaches/ drainages of approximately 10m cross section, which are 50m or
                                                                                             3
        more in length a suitable auxiliary fan should be provided to ensure atleast 150 m /min
                                                                                           3
        ventilation air currents within 4.5m of the faces in normal conditions and 284 m /min at
        the time of blasting and the time following the blasting. The minimum amount of fresh air
                        3                                         3
        shall be 4.25m per minute per person. In addition 5 m of air per minute shall be applied
        per brake horse power of diesel equipment. In addition to the above limit the ventilation
        systems shall have a minimum capacity which allows the withdrawal of all gases and
        dust resulting from a blast within a period of time not more than 15 minutes, so that after
        this time has elapsed, all operations can be resumed. No person shall be allowed to re-
        enter the place where blasting has been carried out unless a period of at least 15
        minutes has elapsed from the time of blasting.
20.12.5 Ventilation and exhaust system for the excavation of caverns, tunnels and shafts shall
        be of sufficient capacity to maintain an adequate supply of uncontaminated pure air at all
        points. The design of ventilation system shall take into account, factors such as length of
        heading, size of tunnel/shaft/caverns, amount of explosives used, frequency of blasting,
        temperature and humidity and safe limits of endurance for human being to toxic gases.
                                                                                  o
        The wet bulb temperature in any working place should not exceed 33.5 C and where the
                                              o
        wet bulb temperature exceeds 30.5 C arrangement shall have to be made to ventilate
        the same with a current of air moving at a speed of not less than 1m/sec. All the
        ventilating and lighting arrangements specified in this section shall be considered as part
        of the items of underground excavation by tunneling and no extra payment for this shall
        be made.

20.13 NOISE CONTROL:

20.13.1 Noise is considered to be impulse when the variations in level involve maximum at
        intervals greater than one second; when personnel are subjected to sound levels
        exceeding the limits specified in this section, feasible engineering or administrative
        controls shall be utilised. If such controls fail to reduce sound levels within the specified
        limit, personal protective equipment shall be provided and used to reduce sound levels to
        the specified limit. The following standard shall have to be maintained for works for 8
        hours duration work.

1.      A work limit value of 85 Db (A) continuous may be set as the level below which very little
        risk to an unprotected ear, of hearing impairment exists for an eight hour exposure.
2.      The danger limit value shall be 90 Db (A) above which the danger of hearing impairment
        and deafness may result from an unprotected ear.
3.      A worker should not be allowed to enter without appropriate ear protection, an area in
        which the noise levels is 115 Db (A) or more.
4.      Personal protective equipment shall be worn, if there are single isolated outbursts of
        noise which can go above 130 Db (A) „Impulse‟ of 120 Db (A) „Fast‟.
5.      No worker shall be allowed to enter an area where the noise level exceeds 140 Db (A)

20.13.2 In all cases where the sound levels exceed specified limits, a continuing, effective
        hearing conservation programmes shall be administered.             Sound pressure level
        measurements shall be made by qualified personnel using calibrated instruments. Noise
        hazardous area (greater than 85 Db(A) continuous or 130 Db(A) impulse or 120 Db (A)
        „Fast‟) will be marked with caution signs indicating both the pressure of hazardous noise
        levels and the need for hearing protection.

20.14 DUST CONTROL:

        The average concentration of respirable dust in the work front during each shift, to which
                                                                                            3
        each worker is exposed at any working point or place, shall not exceed 3 mg/m . This
        limit value will be applicable when the respirable dust contains 5% or less of free silica in
        air borne dust. Where dust contains more than 5% quartz or free silica the limiting value
        shall be determined by the following formula

                       5
                                                            3
        Percentage of respirable quartz or free silica mg/m

1.      All respirable dust concentrations shall be measured by the NCB/MRE Dust sampler type
        113 A of UK or its approved equivalent.
2.      The minimum frequency for determination of the respirable dust concentrations shall be
        once a month at different working points.
3.      Dust control measures should be adopted if the concentration exceeds the limit below
        five micron size. The dust control measures are several including thorough wetting of
        the surfaces at locations which produce dust for example the areas to be blasted, loading
        and unloading places, crushing or dressing of stones etc. Another effective dust control
        measure is the provision of suitable dust respirator where the permissible limits are
        exceeded.
4.      From the drilling and blasting point of view the dust control measures include:
a)      Wet drilling
b)      Before any shots are fired, the roof/back hanging wall, footwall and sides in the vicinity
        shall where practicable and unless naturally wet throughout, be thoroughly wetted with
        water.
c)      As far as practicable, the times for shot firing shall be so chosen that a minimum number
        of persons are exposed to dust.
d)      After shots have been fired (i) airborne dust in the place shall be actively removed by a
        current of air and (ii) after the place has been examined and declared safe, the face,
        walls and sides and all loose rock within a radius of 4.5m of the site of blasting shall be
        thoroughly wetted with water
e)      Dust suckers may be used in dust laden atmosphere

20.15 COMMUNICATION FACILITIES:

        The Contractor shall install and maintain proper communication facilities in good working
        order at all times during the whole period of the work concerned at or near the working
        face of the tunnel, shaft and caverns etc, as well as other points so as to afford prompt
        communication over telephone, with some responsible employees of the Contractor
        outside the tunnel, shaft and caverns, etc. The Contractor shall also install, maintain and
        operate such other communication and signal facilities as may be necessary for the safe
        and efficient execution of the work. All such facilities shall be subject to the approval of
        the Engineer-in-Charge. Employer shall have free use of such communication and
        signal facilities.

20.16   TUNNEL EXCAVATION             THROUGH       ROCK     NOT     REQUIRING       ANY    STEEL
        SUPPORTS:

        Rock bolts with shotcreting are proposed to be provided as support wherever necessary
        as per approved drawings. The excavation and support installation operation shall be
        made in a coordinated way to avoid the creation of unbalance forces on the tunnel
        sections.

20.17 SMOOTH BLASTING:

20.17.1 Smooth blasting technique shall only be adopted for tunneling and shall be in accordance
        with the following. The smooth blasting will require closely spaced contour holes,
        carefully, aligned and lightly loaded to obtain satisfactory smooth blasting results. A well
        excavated surface should show on the rock face the traces of at least 75% of the drill
        hole traces distributed uniformly in the peripheral Rock surfaces exposed by each round,
        after scaling down of all loose and shattered rock liable to fall before or during rock
        reinforcement installations. In this method, closely spaced holes are drilled along the
        final perimeter of the excavation and are blasted in a single round along with the
        production holes using suitable delay detonators in between. Alternatively, a bark of
        about0.8M to 1.0M may be left along the periphery of the caverns, tunnels etc., in the
        previous blast and this bark would then be blasted after drilling closely spaced holes
        along the perimeter in the next round of the blast along with its production holes. The
        method which will give the best results would be adopted.
20.17.2 Before starting the excavation, the Contractor shall make, a series of test blasts in areas
        different than the final excavation surfaces of the tunnel, cavern etc, to demonstrate that
        the drilling patterns, spacing of the contour holes, blasting delays, loading etc, are
        satisfactory to obtain the required results. If the Engineer-in-Charge is not satisfied with
        the drilling and blasting pattern proposed by the Contractor, the Contractor should
        arrange to get the blasting design from a reputed organization/laboratory and should
        adopt such blasting design with the approval of the Engineer-in-Charge.

20.17.3 Based on the tests, the details of the method of smooth blasting shall be finalized and
        got approved by the Engineer-in-Charge. The approval of the proposed method or
        methods for excavation, support of installation, transportation and co-ordination of
        operations, shall be made based on the efficiency of the proposed plan, but the approval
        shall not absolve the Contractor from the responsibilities during the execution of the work
        as required by these specifications and the details shown on the approved drawings.

20.17.4 The length and number of holes, the charge of gelatin per hole and the sequence of
        detonation shall be determined with the purpose of reducing the over excavation to the
        very minimum and maintaining the periphery as close as possible to that shown on the
        approved drawings. Necessary precautions in determining the above should be taken to
        minimize over excavation. If the systems adopted by the Contractor cause over
        breakage out side the allowable limits, by Engineer-in-Charge may ordered the change
        of system as deemed necessary and the Contractor shall not claim any compensation
        extra over the quoted price.
20.18   CAVE-INS IN TUNNELS
        The Contractor shall, at all times, take all the measures deemed necessary or ordered by
        the Engineer-in-Charge to avoid Cave-ins in Tunnels.

        In case a Cave-in occurs or the signs indicating the possibility of its occurrence are
        observed, the Contractor shall take all necessary measures to avoid its further spread
        and prevent accidents and shall notify immediately the Engineer-in-Charge. In such
        cases, the Contractor shall take all measures ordered by the Engineer-in-Charge.
        The Contractor shall carryout all works required to control the cave-ins including those
        ordered by the Engineer-in-Charge. The removal of caved-in materials, the necessary
        repairs and the accidents that may occur shall also be the Contractor‟s responsibility.
        The Contractor shall have no right to request for extension of time for the completion of
        the works, if the delay is due to the fault of the Contractor.
20.19    EXCAVATION OF TUNNELS THROUGH ROCK REQUIRING PERMANENT STEEL
        SUPPORTS:
        The Contractor may be required to excavate some sections of the tunnels through weak
        or weathered rock by means of acceptable methods which allow a permanent control of
        the front and avoid cave-ins and slides. He may also use the excavation and
        transportation equipment that best suits the working conditions with the approval of the
        Engineer-in-Charge. The excavation shall b coordinated with the installation of laggings
        with structural steel supports and with the back filling operation behind supports to
        provide an immediate permanent support for all the material surrounding the tunnel.
        Where such zones of rock are found the excavation shall be started using manual
        methods or pneumatic tools in order not to disturb the neighboring materials. In case, it
        is impossible to execute the excavation using these methods and it becomes necessary
        to resort to explosives, blasting shall be made in a controlled manner. However, only
        smooth blasting method shall be used everywhere, as per the pattern approved by the
        Engineer-in-Charge.
      When supports and laggings are placed, they shall be tightly packed at their contacts
      with the roof and walls in such a way as to give positive support to rock and prevent its
      sagging and thus to obtain a safe protection.

20.20 TEMPORARY SUPPORTS:

      With adoption of smooth blasting, immediate shotcreting with dramix steel fiber and
      provision of permanent supports where required and within specified period after
      blasting, it is felt that there will be no situation where temporary supports will be required.
      However, these shall be erected by the Contractor when so directed by the Engineer-in-
      Charge. Consequences if any for his failure to do so in proper time shall be the sole
      responsibility.

      The methods, the extent of supporting, sizes and spacing of supports etc, shall be as
      approved by the Engineer-in-Charge. This shall also include temporary supports or
      propping that may be needed before fixing supporting bolts. The stipulations given for
      permanent supports shall apply in this case of temporary supports also. The supports
      shall be of steel or timber and they shall be removed before placing the concrete lining.
      The members of the supporting frame work proposed to be left should not reduce the
      minimum thickness of concrete lining as shown in the typical supported sections on the
      drawings. All the material from the temporary supports removed shall be the property of
      the Contractor.

20.21 EXCAVATION AT TUNNEL JUNCTION AND CORNERS:

      Special care and precautions shall be taken to carry out excavation at tunnel junctions to
      avoid over breaks. Spacing of the contour holes in the drilling pattern should be reduced
      and the blasting charge adjusted in the shell or bark blasted last in the zone adjacent to
      the final excavation lines to give the desired results.

20.22 SEALING AND TRIMMING OF ROCK:

      After the face is blasted, gases removed and the face ventilated all loose or loosened rock from the top and sides shall be
      removed as quickly as practicable by approved methods to avoid danger to workmen and equipment later. If any loose or
      loosened rock is noticed anywhere in the excavation it shall be removed expeditiously.


      As the work advances, trimming of rock surfaces remaining within the minimum excavation line shall be undertaken
      simultaneously. In no case shall trimming be postponed and left to be tackled last.


20.23 TREATMENT OF FAULTS AND MINOR CRACKS IN TUNNELS:

      During the excavation of the tunnels some cracks, shearing zones and/or faults, may be
      found which do not require support as determined by the Engineer-in-Charge. The
      treatment of these zones is indicated below.

      The Contractor shall remove all the material filling the crack or fault down to a depth as
      directed depending on the width of the crack. Its surface shall be cleaned with water and
      air jets. If some types of lining is planned for this section of the tunnel, the same shall be
      provided as directed by the Engineer-in-Charge. Rock bolts will be required to be
      provided as determined by the Engineer-in-Charge, if that section is to remain unlined.
      Besides fixing of rock bolts shortcrete reinforced with welded Steel Fiber shall be used to
      fill and cover the crack according to dimensions and details ad directed.
20.24 EXCAVATION OF AUXILIARY TUNNELS:

        In order to complete the construction of the underground work in the prescribed time it
        may be necessary to drive Auxiliary tunnels not included in the scheme of works put to
        tender. The Contractor shall propose the location of such tunnels so that the stability or
        operation of any present or future work is not disturbed. The Engineer-in-Charge will
        study the proposal and may approve or reject it. The approval of the Engineer-in-Charge
        does not in any way absolve the Contractor from his responsibility for damages and
        inconveniences that may arise from the excavation or the present of such tunnels.

        The Construction of Auxiliary tunnels shall meet the requirements stipulated for tunnels.

20.25 EXCAVATION OF ADIT AND TUNNELS:

        Besides other provisions, it is necessary to take the following into account for the excavation of the Adits and Tunnels.
        The Contractor shall select the most proper excavation method, either with excavation in full section or in heading and
        benching etc. The Contractor shall clearly indicate in his proposals with sufficient details of the method that he intends to
        use such as full face or heading and benching. This information shall also include proposed drilling and blasting patterns
        and equipments to be used for each Adit and Tunnel.


20.26  EXCAVATION LINES IN CASE OF ENLARGEMENT AND OVER BREAKINGS DUE TO
NATURAL CAUSES:

        Any enlargements considered necessary by the Contractor for the convenience of his
        work may be done by him with the prior approval of the Engineer-in-Charge. This shall
        be back filled with concrete of a class similar to the lining at his cost.
20.27 SUPPORTING SYSTEMS FOR TUNNEL:
       In portions of the sections of work, it may become necessary to support rock by
       permanent structural steel supports and excavation may have to be increased to
       accommodate the supports. The proposals and the drawings for placing supporting
       system with permanent structural steel shall be got approved by the Engineer-in-Charge
       before taking up it.

        All type of supporting systems, their components, methods and procedures of furnishing,
        installation and manufacture shall confirm to Indian standard specifications and its
        subsequent revision and other publications listed below unless other wise specified.

        IS:226-1975           Structural Steel (Standard Quality)
        IS:800-1982           Code of practice for use of structural steel in general building
        construction
        IS:8266-1976          Expansion shell type roof bolts
        IS:1786-1979          Structural Steel (Standard Quality)
        IS:1363-1967          Black hexagon bolts, nuts and lock nuts and black hexagon screw
        IS:1368-1967          Dimension of ends of bolts and screw
        IS:2108-1962          Black hearth malleable iron castings
        IS:1030-1974          Carbon steel casting for general engineering purpose
        IS:269-1971           Ordinary and low heat Portland cement
        IS:1343-1980          Code of practice for pre-stress concrete
        IS:6003-1970          Specification for intended wire for pre-stress concrete
        IS:6066-1971    Recommendation for pressure grouting of rock foundations in river valley
        Projects
        IS:1521-1960    Method of tensile testing of steel wire
        Wherever necessary, placement of steel supports or installation of rock bolts shall be
        done as soon as possible after excavating of each face is finished and in such a way that
        the natural cohesion of the rock is optimally used.
        Erection of supports shall be done in such a way as to keep grades and alignments of
        tunnels in accordance with the approved drawings. All ribs shall have a steel base plate
        which will be set on steel channels, concrete blocks using also steel wedges in order to
        avoid sinking of the supports.
20.28 DEWATERING:
       Dewatering shall be carried out as necessary during the whole contract period. The
       whole system shall be so designed as to cater for discharges due to seepage and
       leakages that may find way into any of the work area. The design capacities and general
       arrangements of all installations shall be got approved by the Engineer-in-Charge. The
       Contractor shall provide required gutters, adequate drainage systems, sumps and install
       and operate necessary pumping equipments. The Contractor shall take abundant care
       to safe guard pumps and all other accessories for dewatering and no compensation what
       so ever shall be paid for any claim likely to occur in such a case. If any damage to his
       own work is caused due to failure of dewatering arrangements, the Contractor shall have
       to set right such damages with his own cost. If such failures cause damages to works of
       other agencies/department it shall be set right with his own expense.

        In case the Contractor, for any reasons, suspends his dewatering operations for any
        period but the dewatering considered essential by the Engineer-in-Charge, the Engineer-
        in-Charge shall have the liberty to take over this operation of dewatering and recovering
        the amount spent on this by the Engineer- in- charge.
                                        SECTION - C 21
                                    DELIVERY MAINS
21.1 Scope of Work

      The specification described herein under cover all labour, materials, plant, equipment and

      service related to the handling, fabrication, transportation, erection, painting, testing and

      commissioning for steel liners and its accessories from high tensile steel plates, concreting

      around steel liners in the tunnel pack grouting, consolidation grouting, concreting for

      Rockers Pedestals & Anchor block including manufacture, transport and supply of

      expansion joints to be carried out by the Contractor under this contract.



      The Contractor has to set up his own site workshop for cutting, bending and shop welding
      of the plates. All the machinery, tools and plant including plate bending machine required
      for successful completion of the work envisaged in the contract are to be procured by the
      Contractor at his cost.

21.2 Submissions:
     Atleast thirty days before starting the execution, the contractor shall submit the following
     item as under to the Engineer-in-Charge.

    a) The standards of steel plates proposed to be utilized to be specified.
    b) Fabrication drawings of all the straight shells
    c) Development drawings for bends, reducer cones and bulkheads and their fabrication
       drawings.
    d) Drawings of manhole arrangement and drawings for piezometer connections grout holes
       etc.,
    e) Drawings for Expansion joints
    f) Steel liner assembly drawing indicating the shell numbers position of manholes grout
       holes, stiffener rings, back up plates and other important features and clearly identifying
       the shop welds and field welds.
    g) Drawings showing edge preparation details (weld groove design) and any other relevant
       details for the various types of joints involved.
    h) Statement showing weights of the fabricated components intended to be billed duly
       supported by the computations.
    i) Drawings indicating identification markings intended to be made for radiographic
       inspection of welds.
    j) Drawings showing the details of embedments or rail track and other arrangement
       intended for handling and track and other arrangement intended for handling and
       erection.
    k) Any other drawings or calculations that may be required for the execution of the work
    l) The Contractor shall certify that drawings furnished by him, have been checked before
       submission and he shall be responsible for the correct fitting of the parts.

        The Contractor shall submit the drawings exhibiting plate cutting schedules clearly
        identifying as to how the Contractor intends to utilize each of the steel plates and get
        them approved by the Engineer-in-Charge before starting of fabrication work.
21.3 Materials
21.3.1 The steel plates shall be in confirmation to the relevant IS Standards.
       Before bringing the steel plates to the site, the Contractor shall furnish the quantity check
       certificate issued by the manufactures (SA12/TISCO) to the Engineer-in-Charge

21.3.2 The materials used in the fabrication and erection of the steel liner shall comply with    the
       specifications as laid down in section-6 of this Document. Where materials are             not
       specifically covered by detailed material specifications, the Contractor shall furnish     the
       best available commercial grades of materials or articles to the satisfaction of           the
       Engineer-in-Charge.

21.4     At least 30 days in advance of the transportation of steel plates and steel liner
         assemblies to the site of erection, the Contractor shall supply, the following details to the
         Engineer-in-Charge for approval.

     a) Method/Procedures for handling and transportation of various assemblies, specials and
        equipment to be used.
     b) Arrangement/procedure for handling/erection of steel liner assemblies and specials etc.,
        into the tunnel along with details of equipment to be deployed, procedure for alignment
        and welding in field.
     c) Detailed procedure for sand blasting and applying necessary primer etc., in shop and
        coats of paint to be applied in shop/field along with necessary tests therefore.
     d) The Contractor shall submit along with each consignment of assemblies, accessories of
        steel liner, the parts catalogue in English language especially prepared to cover all the
        work/items of equipment furnished under these specifications which may be painting and
        repair. All name plates, instruction plates, warning signs and any marking whatever on
        the equipment and its parts and accessories shall be in English language.

21.5      Atleast 30 days prior to commencing radiographic examination, the contractor shall
         submit details for all radiographic equipment, process and procedures for the approval of
         the Engineer-in-Charge. The type and make of the radiographic films intended to be
         used shall be got approved from the Engineer-in-Charge

         The Engineer-in-Charge reserves the right to call for any additional information deemed
         necessary to be included in the submitted documents.

21.6   STANDARDS

         The designs, fabrication, installation, painting and testing of steel liner shells, shall
         conform to the following Indian standards or where not covered by these standards to the
         equivalent international standards.

a)       Steel plates and other material

          Sl.   Material                                                  Standards
          No.
          1     Steel plates for steel liners 14mm to 25mm                I.S. 2002 Grade.III
                thickness
          2     M.S.Bolts, studs, nuts and washers                        IS:1364 Grade S-Semi Precision or
                                                                          equivalent
          3     Stainless steel for piezometer plugs                      BS:970-EN-56-A or IS:570 (Schedule
                                                                          V) or equivalent
          4     Gaskets or jointing materials                             BS:1737 or relevant IS specifications
          5     Welding electrodes                                        IS:814
          6     Paints - Zinc Rich primer                                 AWWA specification of equivalent IS
                                                                        specifications
          7     -Cold applied coal tar epoxy paint                      AWWA Specification or equivalent IS
                                                                        Specifications

b)       Welding IS:2825 -1969           Code for uniformed pressure vessels

              ASME                       Boiler and pressure vessel code of American Society of
                                         Mechanical Engineers

c)        Painting AWWA-C-203-78         Coal tar protective coating and lining for steel water pipe
     Lines
                                          standard of American water works Association

d)       Inspection IS:2825-1969         As in (b) above
          And ASME code

e)     Testing AWWA-C-203-78             As in (C) above
          SNT-TC-IA                      Recommended practice         for   nondestructive   testing
personnel
                                         qualification and certification of the American society


         In case of the conflict between the above standards and these specifications given herein
          these specifications shall take precedence.




21.7     FABRICATION

21.7.1 The concentration of the welded joints shall be such that no two main seams come
       together under an acute angle or cross each other. Where it is not possible to comply
       with this requirement, the intersection of these welds shall be radiographed, 100mm
       each side of such intersection. The longitudinal joints shall be staggered, at least by five
       times the thickness of the thicker plate.

         Longitudinal seams of steel liner sections shall not intercept the openings provided for
         manholes and piezometer connections etc. The designs, size and location of these
         openings shall be selected as required in IS-2825 1969.

         Manholes shall be provided with suitable handles, flanges and covers, properly
         machined and shall be complete with bolts, nuts, washers, gaskets etc.,

21.7.2 CUTTING OF PLATES AND PREPARATION OF EDGES

         No cutting of plates shall be started without getting relevant drawings showing cutting
         schedules approved from the Engineer-in-Charge.

         Where plates to be welded need cutting to size and shape or squaring in shop following
         broad guidelines shall be adopted.

         Cutting can be done by machine or flame cutting. Where the plate thickness does not
         exceed 25mm, cold shearing may be allowed by Engineer-in-Charge provided that the
         sheared edge is cut back by machining or chipping for a distance of one quarter of the
         plate thickness but in no case less than 3mm.
         Plate edges shall be made in conformity with the specification drawings to suit „V‟ or „U‟
         welds as applicable to various thickness for all longitudinal and circumferential welds in
         shop and field welds for ferrules to be erected over ground. Edge preparation for all
         circumferential joints in field for the steel liners to be erected in the shaft tunnels shall be
         to suit single „U‟ or „V‟ joint with backing strip.

         While making of plates shall be as per approved fabrication drawings, Standard/accepted
         procedure for marking, edge of steel plates confirming to the above specifications can be
         prepared by planning, flame burning, chipping, grinding or are gouging.

21.7.3 EDGE PREPARATION:

         Edge preparation of steel confirming to the above shall preferably be done by planning.
         In the event of flame cutting followed by chipping and necessary grinding, oxy-acetylene
         torches may be employed such that basic properties of steel are not affected. In the gas
         cut edge preparation, 2mm to 4mm of metal shall be removed from gas cut surface by
         machining or grinding as approved by the Engineer-in-Charge

21.7.4 BENDING OF PLATES:

         Plates for shell section shall be formed to required shape by cold bending process only
         such that it does not impair the quality of steel.

         All plates shall be initially pinch type cold formed/bent on plate bending machine which
         shall ensure a circular shell from the calculated circumferential length of shell of the
         required internal nominal diameter.

         Curvature of bent shells shall be checked with the help of necessary templates.

         Correction of curvature neither by blows nor by not forming shall be permitted.

21.7.5 PLATES OF UNEQUAL THICKNESS:

         Where two plates at a welded joints differ in thickness, the thicker plate shall be trimmed
         to a smooth taper as per IS:2825.

21.7.6   STIFFENER RINGS THRUST COLLARS AND BACKING BARS

a)       Stiffener Rings and thrust collars
i)       Stiffener rings and thrust collars wherever required shall be fabricated from minimum
         number of circumferential sections but welded together and properly fitted and welded to
         the pipes/ferrules such that the planes of rings shall be normal to the axis of pipes
         ferrules.

ii)      The butt welds in a stiffener ring shall be positioned as to have proper staggering with
         reference to main longitudinal butt welds in the pipe shells.

iii)     The holes/openings shall be drilled in the stiffener rings as per drawings to permit flow or
         concrete and the same shall have smooth finish.

21.7.7   BACKING BARS:

         The Contractor shall use M.S. Flat 75X10mm for field circumferential joints in the tunnel
         shafts. The method of attachment of backing bar to the pipe shells shall be as indicated
         in the drawing. The Contractor shall carryout all necessary cutting, machining, welding
         etc, for preparing and attaching the backing bars.
21.7.8 MANHOLES, NOZZLES ETC.

        All manholes, nozzles, flanges and other accessories (including covers/O-rings, bolts,
        nuts, washers, plugs etc) as may be required, shall be installed on the steel liner sections
        as per the requirement as directed by the Engineer-in-Charge.

21.7.9 BENDS AND REDUCERS
       Bends shall be made of short segments of pipe with mitered ends and shown on the
drawings.

        Segments of each bend shall be made with equal deflection angles, except for the end
        ones. The deflection of end segments shall be half the deflection of the central
        segments.

        Such segments shall be formed from cut plates, with necessary marking.

        For change in diameter of steel liner, reducer or expansion pipe shall be provided.

        The Contractor shall furnish his proposal for preparing testing and transporting and
        erection of bends and reducer cones clearly indicating extent of work intended to be
        done at the site workshop as well as during erection.

        The bends shall be so fabricated as to have a staggering of about 30 to 60 degrees
        between the longitudinal welds in the consecutive bend courses when installed
        depending upon the length of plates supplied.

21.7.10 BULK HEADS:


        Conical type bulk heads if required are to be fabricated and erected by the Contractor.
        The bulk heads shall be fabricated as per the design and drawings approved by the
        Engineer-in-Charge to meet the requirement.

21.7.11 ALIGNMENT AND TOLERANCES:

        Alignment for longitudinal and circumferential joints in shop and circumferential joints in
        field for shells made from steel conforming to IS 2002-1992 grade.III can be permitted
        with only minimum number of fit up dogs/cleats which shall be properly welded and
        neatly removed after alignment to ensure no injury to the parent plates.

        Before any welding is commenced, it shall be ensured that the chamfered edges are in
        alignment and that the displacement of the joints is less than:


        e/50 + 1 + e/2 mm for longitudinal joint
        and
        e/50 + 2 e/2 + p/2 mm for circumferential joint
        here e and p are the difference between the actual thickness if the edges involved and
        tolerance on the circumference respectively.
        Other tolerances shall be as specified below or as provided in other acceptable international standards:



(a)     The variation from theoretical shape of straight piece of a shell shall be less than
        (+2r/1000) + 2(22) (ef-et) +4) in mm
        where
        r=Radius of the shell in mm
           ef=Effective thickness of steel liner plates in mm
           et= Theoretical thickness of steel liner plates in mm
           The external circumference of the completed pipe shells shall not depart from the
           calculated circumference based on the nominal outside diameter by more than 0.25
           percent.

     (b)   Individual Cylindrical shells shall be reasonably square and straight. The straightness of
           the generating lines of a shell shall be less than 2L/1000 in mm, where L=Length of a
           shell in mm.

     (c)    The irregularities in profile of a shell (checked by 20 gauge) shall not exceed 3 mm plus
           5 percent of the minimum plate thickness. The maximum value may be increased by 25
           percent if the length of the irregularity does not exceed one quarter of the length of the
           shell with a maximum of 1000 mm.

     (d)   The difference between the maximum and the minimum diameters at any cross section
           of a shell welded longitudinally shall not exceed 0.50 percent of the nominal internal
           diameter (with a maximum of (D+1250)/200 in mm).

21.7.12    a) Weld preparations whose cross/sectional dimensions vary from those shown on the
           approved workshop drawings by more than the following tolerances, shall be corrected
           prior to welding.

i)             Root opening of joints + 1.5mm
ii)            Groove angle + or - 5 degrees.
iii)           Size and location of root face + or - 1.5 mm
iv)            Radius of „J‟ / „U‟ grooves + 2mm

b)         The maximum offset (or other defect in alignment) between abutting external surfaces at
           any position along a butt joint shall not exceed 2 mm for both the longitudinal joints as
           well as circumferential joints.

c)          The following limit shall apply to the fit-up of joints to be fillet welded and to the fit-up of
           stiffener rings (as well as anti-percolation rings) to pipe shells
           Gap at Joint 2mm maximum

           This provision is subject to condition that effective throat thickness of the weld shall be
           not less than that specified in the approved drawings.

21.8 GROUTING AND DRAINAGE HOLES:

           Holes for grouting in locations as directed by the Engineer-in-Charge or as shown in the
           drawings shall be required to be made in the steel liner.

           Necessary plug for grouting holes shall also be fabricated and supplied by the Contractor
           and same shall be fitted in position and steel welded after needful operations on site are
           completed.

           The grout holes shall be sealed by plug after grouting is completed.

21.9 EXPANSION JOINTS:
        Double sleeve expansion joints as per drawing should be fabricated and erected at site.
        The chemical composition and mechanical proportion of steel plates used in expansion
        joints to confirm those of steel plates used in delivery lines. The rate shall include,
        manufacture, testing and erection at site of work.
21.10 WELDING
21.10.1 Surfaces to be welded shall be clear and free from scale, rust, paint and other matter. All
        welding will be performed by the electric arc method, using a process that will exclude
        the atmosphere from the metal and where practicable automatic welding equipment shall
        be used. All welding shall be done in accordance with the requirements of fabrication
        and inspection of the ASME code or relevant IS codes for welding of liners and steel
        pipes. All welding electrodes required for the fabrication/installation of the water
        conductor steel pipeline shall be furnished by the Contractor. Where weld is deposited in
        successive layers, such layer shall be cleared of the slag and other deposits before the
        next layer is applied. Tack weld should be chipped out before final welds are made. On
        interior surfaces the reinforcement layers shall not extend more than 3mm beyond the
        surface of the plate. All welds shall have complete penetration and shall not contain
        detrimental imperfection. The back sides of the welds joints shall be chipped or flame
        gauged to sound metal before deposit weld metals to the back sides of the joints.
        Defects in welds shall be chipped or flame gauged until sound metal is reached in all
        sides and the resulting cavity shall be re-welded. The welding of temporary attachments
        to the pipeline sections for the purpose of handling or aligning of the section to each
        other, shall be limited to essential requirements subject to the approval of the Engineer-
        in-charge. All such attachments shall be removed by careful chipping by flame cutting
        and any damage to sections shall be repaired by welding, if required. All longitudinal and
        shop circumferential welds in the pipe shells and for the ends of stiffener rings shall be of
        double welded butt joints or single welded butt joints, whereas field circumferential welds
        shall be single welded butt joints with backing up strips. When single welded butt joints
        are used, the root of the welds shall then be deposited to obtain full penetration. After
        welding is completed all weld shall then be deposited to obtain full penetration. After
        welding is completed all weld spatter shall be removed by grinding. All welding shall be
        performed under cover and pipeline sections to welded shall be protected from the direct
        rays of the sun. All welds which fail to pass non-destructive tests described in para
        19.10.5 shall be made on all welds which have been thus prepared.


        As far as practicable, all welding between dissimilar thickness shall be done in the shops.
        Where the thickness of pipe varies, the difference in thickness of pipes shall be restricted
        to 5mm. The internal diameter shall be kept the same at such junction.


21.10.2 WELDING PROCEDURES
        The specifications of each welding/welding procedure that has to be followed in
        construction shall be recorded in details by the Contractor. Such procedure shall be
        qualified in accordance with latest practices, and shall conform to IS: 823 – 1964 and IS :
        4353 -1976.


21.10.3 QUALIFICATION OF WELDERS
        All welders assigned to manual welding shall have successfully passed the tests
        prescribed for welder qualification as per IS : 1181 and IS : 817. If in the opinion of the
        Engineer-in-charge or his representative, the work of any welding operator
        becomes/appears questionable, such operator shall be required to pass another
        qualification test. The Contractor shall supply materials, equipment, apparatus and
        labour required for making the above tests.
21.10.4 NON-DESTRUCTIVE TESTS
        Wherever welded butt joints are used for the joints for the pipe course or expansion
        joints, these will be subjected to Radiographic test for full length.
      All longitudinal joints and circumferential shop joints shall be subjected to 100%
      Radiographic examination and circumferential field joints are subjected to 100%
      ultrasonic examination.


      The procedure for the radiographic examination, the acceptable standards of welds, the
      repair of defective welds and the re-examination of repaired welds shall conform to IS :
      1182 or relevant sections of ASME code.


      The costs of weld tests and radiographic examination shall be borne by the Contractor.
      Prior to making the radiographs identification marks adjacent to the welds, such marks
      shall be so designed and located that the images will appear in radiographs. The mark
      shall be painted, stamped or fastened to the shells as directed by the Engineer-in-
      charge. All X-Ray films of the welded joints shall become the property of the Employer
      and shall be forwarded (properly identified) to Engineer-in-charge. Radiography by X-
      Ray may be replaced by Gamma-ray method using either cobalt 60; iridium 192 or
      ceasium 137.


21.10.5 TEST DURING FABRICATION AND ERECTION

      The Contractor shall carry out the following tests on each pipe and weld joints
      individually.


a)    Hydrostatic Test

                 Each section of the steel pipeline (including bends fabricated for field erection)
      shall be tested under hydraulic pressure equal to 1.5 times design pressure. However
      pressure for hydrostatic tests, shall not exceed the pressure computed by the following
      formula.


                   Straight pipes and bends:
                         Yp x T
         P         =     -----------
                              R
                                         2
         P-        test pressure in N/mm .
         Yp -Yield point stress of steel used in the particular course under test
                              2
              in       N/mm
         T-        actual minimum wall thickness of pipe in mm in the pipe length tested.
         R-        Internal Radius of pipe in mm.


      Each pipe shall be completely filled with water and the pressure shall be slowly and
      uniformly increased until the required test pressure is reached. The test pressure shall
      be applied and released three times successively and after each application shall be held
      steady, for at least 15 minutes or till such time until all welded joint and plate can be
      examined for defects, leaks etc. Any defects in welds or plates disclosed by the
        hydrostatic test shall be repaired by the Contractor to the satisfaction of the Engineer –in-
        charge. All repaired sections shall be again tested hydro-statically.


b)      Leakage Test:

        This will be conducted by filling the pipeline with water from intake with the suitable type
        of valves in the pump house closed. All the field joints and the expansion joints gland
        packing shall be tightened with in permissible limits. If necessary, measures to prevent
        leakage at other location will be taken by the Contractor.

21.11   PAINTING

21.11.1 GENERAL:

        All steel liner assemblies shall be cleaned and painted as hereinafter specified.
        Machined surfaces and screw threads to be in rolling or sliding contract shall be shop
        coated with a rust preventive compound before transportation.

        Outside surface of ferrules to be erected in the tunnels and in anchor blocks shall be
        painted in shop with cement solution. Out side surfaces of other ferrules for over ground
        lines shall be painted with cold applied coat tar epoxy paint.

        Inside surface shall be coated in shop with zinc rich epoxy primer and cold applied, coal
        tar epoxy paint.

        Completed coatings shall, in all respects, conform to the detailed requirements of these specifications.


21.11.2 PAINTING SCHEDULE:
        Cleaning and Painting of steel liner shall be done in accordance with following schedule.
                                                               Total No. of
                                  Paints or Coating                            Dry film thickness
                Item                                            coats (in
                                        materials                                 of paint coats
                                                              shop or field)
         i)         External Coat of Cement solution
         surfaces whichare mixed with 5% potassium
                                                                    1
         embedded         in dichromat
         Concrete
         ii)       Exposed Cold applied coat far
         surface of liners epoxy paint
         above the ground
                              a) Zinc Rich epoxy primer                       Each Coat minimum
                                                                    2
                                                                              of 50 microns
                              b) Cold applied coal tar                        100           Microns
                              epoxy paint                           3         minimum for each
                                                                              coat
         iii)   Inter    on Cold applied tar epoxy
         surfaces             paint
                              a) Zinc Rich epoxy primer                       Each Coat minimum
                                                                    2
                                                                              of 50 microns
                              b) Cold applied coal tar                        100           Microns
                              epoxy paint                           3         minimum for each
                                                                              coat
21.11.3 PREPARATION OF SURFACES FOR PAINTING
       Weld burrs or any other objectionable irregularities shall be carefully removed or repaired
       by suitable means before cleaning.
       Any frit or dust remaining from the cleaning operation shall be completely removed from
       the surfaces by brushing, air blowing, suction or other effective means before the
       surfaces are accepted for painting.
       In the event of rust formation or when the surfaces become otherwise contaminated in
       the interval between cleaning and painting, re-cleaning shall be required to be done.
      Surface preparation shall be in accordance with the method given below.
       All oil, grease and dirt shall be removed from the surface by the use of clean mineral
       spirits, or white gasoline followed by wiping with clean wiping materials, except that for
       surfaces, which require coal tar coatings, the cleaning solvent shall be.

       Following the solvent cleaning, the surface to be painted shall be cleaned to base metal
       to remove all rust mill scale and other tightly adhering objectionable foreign materials by
       san blasting or grit blasting. A clean, dry Gypsum and salt free quartz and having grain
       size 0.7 to 1.5mm shall be used for sand blasting. Blast cleaning shall be accomplished
       with effectively clean the metal and have roughened surface suitable for tenacious
       adhesion of subsequent coasting. The surfaces which have been thus cleaned shall be
       primed as soon as practicable after such preparation has been completed, but in any
       event prior to deterioration of the prepared surface.
21.11.4 APPLICATION PROCEDURE AND QUALITY CONTROL OF PAINTS
       Paint and coating materials to be applied shall be in a thoroughly mixed condition at the
       time of application and shall not be thinned except where hereinafter specifically
       provided.
       Paint shall not be applied when temperature of the steel surface to be painted is less
       than 3 degree C above the dew point or when the weather is frosty/foggy or when the
       relative humidity is enough to cause condensation on the surfaces to be painted.
       Paint shall be applied by air spraying or brushing. The Contractor shall make available
       on site/necessary/equipment to measure the thickness of painting coats.
       Suitable means shall be provided to prevent segregation during the painting operation.
       Each cost of paint shall cover completely and uniformly the surface being painted and
       shall be free from runs sags and blisters.
       Except as other wise specifically provided, each coat shall be allowed to dry or harden
       sufficiently before a succeeding coat is applied.

21.11.5 COVERAGE, APPLICATION AND PREPARATION OF VARIOUS PAINT MATERIALS SHALL BE
       AS FOLLOWS:

a)     Rust Preventive Compound:
       Rust preventive compound shall be applied by any convenient method which shall
       ensure coverage of the surface with a heavy uniform coating not less than 0.4mm thick.

b)     Cold Applied Coal Tar Epoxy Paint:
       The Contractor shall specifically furnish, brand name of paint and the details of the
       relevant specification or accepted Standard practice for application procedure. Primer
       drying time before first coat of epoxy paint can be given shall be indicated. Similarly,
       drying time between each successive coat of epoxy paint and its final curing time for a
       well bonded film as recommended by the manufacturer of paint shall be indicated
        Quality/life of this paint after application shall not deteriorate at any ambient temperature
        form 5 degree C to 75 degree C.
c)      Zinc Rich Epoxy Primer:
        The zinc rich primer shall be applied in two coats by brush or by spray over sand blasted
        surface. The zinc rich primer shall be stirred properly at regular intervals during
        applications.
        Thinning of zinc paste shall be permitted but only with suitable fluid, as directed by the
        Engineer-in-Charge. The addition of suspension fluid shall not exceed 15 percent. The
        second and subsequent coasts of primer shall not be applied earlier than 24 hours after
        the application of previous coat.

21.11.6 CLEANING AND REPAIR OF SHOP PAINTED SURFACES:

        Metal works painted in shop or field shall be handled with care so as to preserve the
        coatings in best practicable condition. Before proceeding with the regular painting or
        coating operation, the Contractor shall clean and repair all areas of shop coat which are
        defective or damaged areas that are loose, weekly bonded, blistered, rusted or otherwise
        defective shall be removed to clean metal by scraping, chipping, power wire brushing or
        other effective means. Areas, thus prepared shall be cleaned of all dust, dirt and other
        contamination using cleaned of all dust, dirt and other contamination using clean rug and
        clean solvent. These surfaces shall then be repainted in accordance with the painting
        schedule and shall be required to pass acceptance tests as specified.

21.12   TRANSPORTATION:

21.12.1 DESPATCH AND TRANSPORTATION

        The transportation of the fabricated shells and accessories from the Fabrication work
        shop to the site of erection shall be started only after obtaining approval of the Engineer-
        in-Charge.

        The safe transport and handling of the steel plates from fabrication workshop to the work
        site shall be done by the Contractor. He shall deploy suitable transportation and
        handling equipment such as trailers, lorries, loading and unloading hoists, winches, rails
        steel rope, jacks, etc.,

        The Contractor shall include and provide for spiders, saddles, or supports, etc, for
        securely fastening and protecting the steel liner assemblies in transit so as to avoid any
        damage to the liner or to the paint done in shop.

        The Contractor shall be fully responsible for all loss and damage caused by or
        occasioned by any defect in handling or transportation.

        All exposed finished surfaces shall be adequately protected against abrasion during
        transport.

        Defects, if any, caused to the pipe courses or painting during transportation and handling
        shall be rectified by the Contractor to the satisfaction of the Engineer-in-Charge.


21.13   MATCH MARKING AND WEIGHT:

        Each part of the steel liner or other auxiliary assemblies shall be legibly marked to show
        their relative position in the finished marking on each assembly to show top of field/shop
        vertical, the direction of flow and the serial number shall be made with light steel stamps.
          The approximate weight of each piece or assembly to be dispatched shall be painted as
          well as indicated in tags attached to the assembly.

          A list of the weight of assemblies/components dispatched by the Contractor from shop to
          the site of erection shall be submitted to the Engineer-in-Charge simultaneously.

21.14     ERECTION

21.14.1 STEEL LINERS TO BE ERECTED IN THE TUNNEL SHAFTS

(a)       The steel liners shall be assembled and installed in place inside the tunnel accurately to
          line and grade as shown on the drawings and as directed by the Engineer-in-Charge.

          Rails required for formation of erection track will be procured by the Contractor and the
          Contractor has to erect these rails at his own cost. The tenderer has to quote his rates
          for erection of ferrules taking into consideration of erection charges of rails for formation
          of Erection track.

(b)       After successful erection of steel liner assembly/assemblies as per approved drawings,
          concreting and grouting etc., of steel liner shall be done before erection of next assembly
          is undertaken.

(c)       Any timber supports provided for supporting the steel liner shall be removed by the
          Contractor before concreting is undertaken and shall not be permitted to be embedded in
          concrete.

(d)       The Contractor shall deploy sufficient drew or skilled and unskilled workmen and
          equipment so that erection of liner and concreting are carried out simultaneously.

21.14.2 ERECTION PROCEDURE

(i) Rail Track

          The Contractor shall preferably install and maintain a rail track to move and to position
          the pipe sections and leave the rails embedded in secondary concrete with the approval
          of Engineer-in-Charge, provided the rails are supported on steel pieces.

          Finger bars and other temporary supports shall be installed in such a way that no
          deformations are induced on the pipe.

(ii) Alignment and Welding

      a) The steel liner shall be installed on site in correct grade and ligament.

      b) The responsibility for accurate alignment and erection of shells and bends with reference
         to the control points rests with the Contractor.

      c) Any defects in the alignment of the steel liner shall be rectified by the Contractor.

      d) Sufficient finger bars shall be used on circumferential joints to maintain the alignment
         during the welding operation.

      e) No track welding shall be allowed in case of pressure vessel quality, high strength
         quenched and tempered steel.
        Field welding inside the steel liner shall be done with back up strip on the outer surface at
       f)
        the joint.
21.14.3 TOLERANCES:

            The tolerances in the alignment and shape of the erected steel liner shall be as
            mentioned below or specified in other acceptable international standards.

  a)        Out of straightness of the shell shall be less than 2L/1000 for the total cylindrical length.
  b)        The difference between the maximum and the minimum diameter at any cross section of
            the erected Cylindrical length shall be within the limits specified in para 2.1.10.4(d)
            hereof.
  c)        For single welded butt joint with backing strip and double welded butt joint with double „V‟,
            the minimum separation of edges of shells to be welded shall not exceed 10mm and
            3mm respectively unless otherwise directed by the Engineer-in-Charge.
  d)        Cleaning and Painting in the Field:

            After erection, concrete back filling and grouting, all temporary fixtures/ appurtenances,
            debris etc., inside the steel liner shall be carefully removed.

            Atleast 200mm wide strip of pipe along the field welded joints shall be thoroughly
            cleaned before painting. The same treatment shall be required at the spots where bars
            or other temporary steel pieces were installed to facilitate erection of steel liners. The
            entire interior surfaces of steel liner shall be cleaned and painted as per specifications
            laid down hereof.
                                   ANNEXURE - AC 01

                                       PUMP HOUSE


1. Size of pump house

2. Bottom level of pump house

3. Shot creting details

4. Side lining thickness and specification

5. Bed concrete thickness and specification

6. Foundation concrete of pumps

    a) Primary concrete - Specification, quantity, reinforcement details

    b) Secondary concrete - Specification, quantity, reinforcement detail

7. Details of specifications of columns for EOT crane

    a) Specification

    b) Number of columns

    c) Span width

 8. Pump roof details

 9. Annexe details

    a)   Number of annexeies considered

    b)   Dimensions of annexe

    c)   Floor concrete - thickness, specification and quantity.

 10. Details of lift proposed

 11. Details of stair case proposed

 12. Service bay size, details of floor concrete

 13. Details of flooring in pump house, annexies and other areas.

 14. Other details if any
                               ANNEXURE – AC 02
                               PRESSURE MAINS


1.      Diameter of Pressure main proposed

2.      Length of Pressure mains

3.      Thickness and specification of steel plates for Pressure mains

4.      Total length of Pressure mains on the ground

5.      Details of anchor/Thrust blocks

     a) Number of blocks and Location

     b) Size of blocks

     c) Specification of concrete

     d) Quantity of concrete

     e) Reinforcement quantity

     f) Pedestals details

6.      Number of expansion joints

7.      Number of rockers and rock pins

8.      Concrete specification and quantity to be laid all around the delivery

       mains in the inclined tunnel shaft

9.      Other details if any
                            ANNEXURE – AC 03
                                 CISTERN


1.   Size of Cistern well

2.   Details of side walls

3.   Details of centre walls

4.   Details of weir

5.   Details of down stream apron and protection works

6.   Concrete quantity specification wise

7.   Other details if any
                                ANNEXURE - AC 04
                                        TUNNEL


2. Length of Tunnel proposed

3. Diameter of the Tunnel proposed

4. Slope of ramp considered at the entrance portal of Tunnel and its excavation quantity

5. Excavation quantity of Main Tunnel

     a) All soils

     b) HDR

     c) F&F

     d) Hard Rock

6. Specification of Lining Concrete proposed

7. Thickness of Concrete Lining

8. Concrete quantity

9. Location & Length of Adit Tunnel

10. Adit Tunnel excavation quantity

11. Quantity of Steel reinforcement if RCC lining is proposed

12. Intake Structure

     a) Details of Concrete proposed for various parts of intake structure.

     b) Details of Gates proposed for intake structures
                           ANNEXURE – AC 05

                   MISCELLANEOUS CIVIL WORKS


1.   Details of Drilling and Grouting in rock ledge.

a)   Drill hole size

b)   Number of rows proposed

c)   Distance between each row proposed

d)   Maximum depth of drilling grouting

e)   Drilling quantity

f)   Grouting quantity and specification

2.   Any other items considered by Bidder
                                     ADDENDUM - 2
                                      ANNEXURE - I
                                MILE STONE PROGRAMME
Name of Work : PRANAHITA-CHEVELLA LIFT IRRIGATION SCHEME – LINK- II - PACKAGE- 8–
Detailed Investigation , Designs and Execution of Lift Irrigation Scheme for drawl and
lifting of 114.24 TMC of water from Ragampet (V),near Kakatiya Canal, Choppadandi
(M), Karimnagar District to Motevagu Reservoir and Carrying by a Gravity Canal to existing
Flood Flow Canal to feed Mid Manair Reservoir with the Components such as Lined Gravity
Canal, CM & CD Works, Lift, Pressure mains and Lined Tunnels with all associated Civil,
Hydro-Mechanical and Electro-Mechanical works.
 Mile                                                                           Financial
Stone     Period                      Description of Item                      (in Overall
  No.                                                                         Percentage)
    1       2                                  3                                    4
              Detailed investigation , Soil exploration, designs,
         3
  1           preparation of land plan schedules etc., for all                    0.16
       months
              components of works and its approval.
              Detailed investigation , Soil exploration, designs,
         3    preparation of land plan schedules etc., for all
  2                                                                               1.00
       months components of works and its approval, Execution of
              Tunnel.
         3    Execution of Lined Gravity Canal and CD & CM works,
  3                                                                               2.00
       months Tunnel works
         3    Execution of Lined Gravity Canal and CD & CM works
  4                                                                               3.00
       months and Execution of Tunnel works
              Execution of Lined Gravity Canal and CD & CM works
         3
  5           ,Execution of Tunnel works, Surge pool, and Pump                    4.00
       months
              house.
              Execution of Lined Gravity Canal and CD & CM works
         3
  6           ,Execution of Tunnel works, Surge pool, and Pump                    6.00
       months
              house, .
              Execution of Lined Gravity Canal and CD & CM works
         3
  7           ,Execution of Tunnel works, Surge pool, and Pump                    6.00
       months
              house, .
              Execution of Lined Gravity Canal and CD & CM works
         3
  8           ,Execution of Tunnel works, Surge pool, Pump house,                 6.00
       months
              and Cistern
              Execution of Tunnel works, Execution of Lined Gravity
         3
  9           Canal and CD & CM works, Surge pool, Pump house,                    7.00
       months
              Cistern.
         3    Execution of Tunnel works, Surge pool, Pump house,
 10                                                                               7.00
       months Cistern and Lined Lead Channel.

         3    Execution of Tunnel works, Surge pool, Pump house,
 11                                                                               7.00
       months Cistern and lined Lead channel and its Structures.
            Execution of Tunnel works, Surge pool, Reservoir, Pump
       3
12          house, Cistern and lined Lead channel and its Structures           8.00
     months
            .
            Execution of Tunnel works, Surge pool, Pump house,
       3    Cistern, Hydro Mechanical works, delivery mains,
13                                                                             8.90
     months Electro-Mechanical works (pumps & Motors)and lined
            lead channel and its structures.
       3    Execution of Hydro Mechanical works, Delivery Mains
14                                                                             9.00
     months and Electro-Mechanical works (Pumps & Motors)
            Execution of Hydro Mechanical works, Delivery Mains,
       3
15          Electro-Mechanical works (Pumps & Motors) and other                9.00
     months
            civil works.
            Execution of Hydro Mechanical works, Delivery Mains
       3
16          Electro-Mechanical works (Pumps & Motors), and other               7.00
     months
            Civil works.
                                 TOTAL( %)                                     91.06


              The Mile Stone pogramme is tentative and will be revised after
     NOTE :   furnishing the Estimate and Mile Stone programme by the
              Agency.
                                    ADDENDUM - 3
                                     ANNEXURE - II
                           SCHEDULE OF PAYMENT
Name of Work : PRANAHITA-CHEVELLA LIFT IRRIGATION SCHEME – LINK- II -
PACKAGE- 8–Detailed Investigation , Designs and Execution of Lift Irrigation Scheme
for drawl and lifting of 114.24 TMC of water from Ragampet (V),near Kakatiya
Canal, Choppadandi (M), Karimnagar District to Motevagu Reservoir and Carrying by
a Gravity Canal to existing Flood Flow Canal to feed Mid Manair Reservoir with the
Components such as Lined Gravity Canal, CM & CD Works, Lift, Pressure mains and
Lined Tunnels with all associated Civil, Hydro-Mechanical and Electro-Mechanical
works.


Sl.No.                       Description of Item                         % of Bid Amount

  1                                    2                                        3
         Excavation of Tunnel, Adits, Surge pool and Draft tube
  1                                                                           20.48
         Tunnels with all other associated works including Lining

         Excavation of Gravity Channel, Construction of CM & CD
  2                                                                            3.20
         works, Head Regulator, etc.,

         Lift works such as Pump House, Pumps, Motors, Hydro-
  3      Mechanical, Electro-Mechanical, Delivery mains, anchor               60.58
         blocks, Delivery Cistern and all other associated works.

         Miscellaneous works, Investigation, Design, Drawings etc.
  4                                                                            6.80
         and Taxes & Duties etc.,

         Operation and Maintenance of Civil works for a period of 5 (
  5                                                                            8.94
         Five ) years and HM & EM works for 15 (Fifteen) years

                                                      GRAND TOTAL             100.00

         1. The above Schedule is subject to Clause No.41.2.4 and
NOTE:
            42 of Conditions of Contract.

         2. The Payment Schedule is tentative. Payment Schedule
         shall be revised after furnishing the working Estimate
         and Component wise cost by the Agency.



 Note:- This Corrigendum No.6 is applicable to the above referred items only
        and other conditions remains same.


                                                                 Sd/28-05-2008
                                                         Superintending Engineer, I&CADD.
                                                         Sripada Yellampally Project Circle,
                                                             Mancherial, Adilabad Dist.

								
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