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					Estimating
PS&E – Plans, specifications and estimate




                                            1
Types of Estimates

   Ball-Park (Planning phase)

   Preliminary (Design Report/EIS)

   Detailed (PS&E---Detailed Design)



                                        2
Estimate Quality

Good book-keeping
Accurate backup of quantities
Familiarity w/ project
Experience




                                3
Estimating Procedure

   List all item numbers-plans and similar plans
   Estimate quantities and prepare a backup for
    each item #
   Assign prices to each item (WAIPR)
   Lump sum price analysis
   Summary of quantities
   Summarize final costs



                                                    4
Item Numbers
 Referenced to spec book
 Examples:
    ◦   201.0601 Clearing and Grubbing
    ◦   15203.51 Grade and Reshape Ditches*
    ◦   304.02 Subbase
    ◦   610.0203 Establish Turf
    ◦   634.01 Survey and Stakeout

    *Regional or other special item numbers must
     have approval before use

                                                   5
Units
Unit abbreviations   Definition
LS                   Lump Sum
EA                   Each
CY                   Cubic Yard
SY                   Square Yard
LF                   Linear Feet
TN                   Ton
MO                   Month




                                   6
Units-Metric
Unit abbreviations   Definition
CM                   Cubic Meters
SQM                  Square meters
MT                   Metric Ton
KG                   Kilograms
M                    Meters




                                     7
Weighted Average Item Price
Report (WAIPR)



   https://www.nysdot.gov/portal/page/portal/divi
    sions/engineering/design/dqab/waipr




                                                     8
Contingency
 Added to estimate to account for
  unknowns
 Usually a percentage of final cost




                                       9
 Cost Estimate Example
   Item #        Description      Unit     QTY         Price      Subtotal
  201.0601       Clear & Grub       LS        1.0   $12,500.0    $12,500.00
                                                            0
  203.0100    Earth Cut & Emb      CY    14,545.0     $12.00    $174,540.00
10209.0100         Bale Dikes       LF       42.0      $7.50       $315.00
  403.1100   Asph Base Course      TN     6392.0      $38.00    $242,896.00
  603.7303    24‖ RCP End Sec      EA         4.0    $700.00      $2,800.00
  637.0701              Office    MO           6    $1,000.00     $6,000.00
  645.2140         Traffic Sign    EA          8     $170.00      $1,360.00




                                                                          10
Backup for Estimate Example
ITEM 640.0102 (White Paint Reflective Paint Stripes)

 2 Shoulder Stripes
 Sta 26+44 to Sta 30+92
 2*448’ = 896’
 Say 900’




                                                       11
Asphalt – English Tons
 .06865 Tons per Cubic Foot (Base)
 .07525 Tons per Cubic Foot (Binder)
 .07265 Tons per Cubic Foot (Top-6F)


   Old Marshall Design

   New Superpave?????


                                        12
Lump Sum Price Analysis
   Estimate for items paid as a ―Lump Sum‖

   Includes:
    ◦   Labor
    ◦   Materials
    ◦   Equipment
    ◦   Rental costs
    ◦   Profit and Overhead

   Typical lump sum items:
    ◦ Clearing and Grubbing
    ◦ Survey and Stakeout
    ◦ Temporary Traffic Symbols

                                              13
Lump Sum Analysis Example
Item 619.13 (Temporary Traffic Signal)
   Labor Costs
    ◦ Backhoe Operator-$30.05/hr
    ◦ Electrician-$32.99/hr
    ◦ Laborer-$22.95/hr
   Installation and Removal of Temp. Poles
    ◦ 1 Backhoe Operator $30.05/hr * 16 hours =
    ◦ 2 Laborers @ $22.95/hr * 16 hours =
   Installation and Removal of Temp. Signal Heads
    ◦ 1 Electrician @ $32.99/hr * 16 hours =
    ◦ 2 Laborer@ $22.95/hr * 16 hours =
   Installation and Removal of Controller
    ◦ 1 Electrician @ $32.99 * 16 hours =
    ◦ 1 Laborer @ $22.95 * 16 hours =
   Materials
   Equipment
                                                     14
Lump Sum Analysis Example-Cont.
Item 619.13 (Temporary Traffic Signal)
   Materials
    ◦ Temporary Poles 4 @ $1,300.00 each
    ◦ Temporary Signal Heads 4 @ $250.00 each
    ◦ Controller, Fixed Time 1@ $1,000.00
    ◦ Misc. Hardwire and Wire $1,000.00


   Equipment (Installation and Removal)
    ◦ 1 Bucket Truck @ $18.00/hr * 24 hours
    ◦ 1 Backhoe @ $35.00/hr * 24 hours



   Profit and Overhead (20%)




                                                15
Estimate Shares
Highway
Bridge
Utilities
Different Counties




                     16
Engineer’s Estimate
Quantities included in plans

Engineer’s estimate not given to contractor

Prices not available to contractor—each
 contractor provides their own bid

Lowest bidder gets the contract

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