North Truckee Drain Relocation Project

							                                HDR | Presentation


    North Truckee Drain
     Relocation Project

Update to Flood Project Working Group

         Shawn Gooch, P.E.
           City of Sparks

            February 27, 2008
North Truckee Drain
Relocation Project




        City of Sparks/HDR Engineering, Inc.

        Final Project Update              JoAnn Meacham, P.E.
        December 18, 2007                 Utility Manager
                                          City of Sparks

        Shawn K. Gooch, P.E.              Jay Aldean, P.E.
        Flood Control Manager             Project Manager
        City of Sparks                    HDR
                                                              HDR | Presentation


What has happened since our last meeting?


• Corps decided to check/review their hydrology for
  the North Truckee Drain
  •   Changed calculation methods
  •   Found inconsistencies with application of original method
  •   HDR performed hydrologic update


• Changed design criteria for the Truckee River
  Flood Project from the 100-yr to the 117-yr
  storm
  •   Resulted in a significantly larger conveyance structure
      (from 2: 10’ x 10’ culverts to 2: 22’ x 10’ culverts)
                       HDR | Presentation



Large Box Culvert Photos
                           HDR | Presentation

Alternative Alignments Considered
                         HDR | Presentation

Alignments as Analyzed
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Alignments Characteristics

ALIGNMENT 1 – PURPLE (NDOT – VISTA)
   Runs east along Brierley Way to Vista
   Located in UPRR R/W (north of tracks) east of Vista
   3 Jack & Bore Crossings: Vista, I-80, UPRR
   Overall Length: ~ 6,400 LF

ALIGNMENT 2 – GREEN (UPRR TO LARKIN CIR)
   300 LF J&B under I-80 to the South
   People’s Drain flow combined w/ NTD on the south side of UPRR
   Stays in back yards of private property
   Crosses Greg Street with 40’ deep open cut
   Follows Larkin Circle to outfall at the Truckee River
   Overall Length: ~ 5,900 feet

ALIGNMENT 3 – BLUE (KLEPPE LN TO LARKIN CIR)
   300 LF J&B under I-80 to the South
   People’s Drain flow combined w/ NTD on the south side of UPRR
   Alignment follows existing NTD to Kleppe Ln
   From Kleppe Ln across parking lot to Greg St
   Crosses Greg Street with 40’ deep open cut
   Follows Larkin Circle to outfall at the Truckee River
   Overall Length: ~ 5,300 feet
              HDR | Presentation



Alignment 2
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Project Costs
Costs presented are in million dollars and do not include land costs
   Alignment 1                                                      $67
       Land Requirements             (PERM)           (TEMP)
           UPRR                          3.4 ac        6.0 ac
           NDOT                          2.9 ac        4.3 ac
           Other Private                 0.1 ac        0.9 ac
           # Lots Impacted                 1             5
   Alignment 2                                                         $45
       Land Requirements
           UPRR                          0.4 ac        1.1 ac
           NDOT                          0.4 ac        0.6 ac
           Other Private                 3.0 ac        7.5 ac
           # Lots Impacted                15            18
   Alignment 4                                                         $46
       Land Requirements
           UPRR                          0.4 ac        1.2 ac
           NDOT                          0.4 ac        0.6 ac
           Other Private                 2.3 ac        6.2 ac
           # Lots Impacted                15            23
                                        HDR | Presentation



North Truckee Drain Realignment


Next Steps
   Value Engineering Analysis
   Environmental Assessment
   Utilities
   Geotechnical Engineering
   Surveying
   Right-of-Way
   Design Build vs Design Bid Build
   104 Cost Sharing and Authorization
            HDR | Presentation



Questions
Current 100-yr Inundation   HDR | Presentation
                        HDR | Presentation
2006 Storm Inundation