Salinas Valley Water ProjectSalinas Valley Water Project

2010 Irrigation and Nutrient Management Field Day2010 Irrigation and Nutrient Management Field Day February 23 2010February 23 20102010 Irrigation and Nutrient Management Field Day 2010 Irrigation and Nutrient Management Field Day -- February 23, 2010February 23, 2010

Manuel Quezada / Chris Moss Manuel Quezada / Chris Moss

Monterey County Water Resources AgencyMonterey County Water Resources Agency

PresentationPresentationPresentationPresentation

Salinas Valley Water ProjectSalinas Valley Water ProjectSalinas Valley Water ProjectSalinas Valley Water ProjectNacimiento Dam Spillway ModificationNacimiento Dam Spillway Modification

ReoperationReoperationReoperationReoperationObermeyer GateObermeyer Gate

Salinas River Diversion FacilitySalinas River Diversion FacilitySalinas River Diversion FacilitySalinas River Diversion FacilityObermeyer Gate (Inflatable Dam)Obermeyer Gate (Inflatable Dam)Pump Station & PipelinePump Station & PipelinePump Station & PipelinePump Station & PipelineFilter Screen StationFilter Screen StationChlorination FacilitiesChlorination FacilitiesChlorination FacilitiesChlorination FacilitiesFish LadderFish Ladder

NACIMIENTO DAM NACIMIENTO DAM SPILLWAY MODIFICATION SPILLWAY MODIFICATION

PROJECT SUMMARYPROJECT SUMMARYPROJECT SUMMARYPROJECT SUMMARY

NacimientoNacimiento Dam and ReservoirDam and Reservoir

IntroductionIntroductionIntroductionIntroduction

TheThe AgencyAgency developeddeveloped thethe SalinasSalinas ValleyValley WaterWaterProjectProject (SVWP)(SVWP) toto addressaddress thethe waterwater resourcesresourcesmanagementmanagement issuesissues withinwithin thethe SalinasSalinas ValleyValley..gg yy

TwoTwo ObjectivesObjectives::

StopStop seawaterseawater intrusionintrusion resultingresulting fromfrom basinbasinoverdraft,overdraft, andand;;Pro idePro ide anan adeq ateadeq ate aterater s ppls ppl forfor c rrentc rrentProvideProvide anan adequateadequate waterwater supplysupply forfor currentcurrentandand futurefuture needsneeds..

BackgroundBackgroundBackgroundBackground

SVWP contains three major components:SVWP contains three major components:SVWP contains three major components: SVWP contains three major components:

Modifications to the Nacimiento DamModifications to the Nacimiento DamModifications to the Nacimiento Dam Modifications to the Nacimiento Dam Spillway to safely convey PMF Spillway to safely convey PMF (~99,000 cfs) w/out overtopping or (~99,000 cfs) w/out overtopping or requiring Flood Pool; requiring Flood Pool;

Construction of the Salinas RiverConstruction of the Salinas RiverConstruction of the Salinas River Construction of the Salinas River Diversion Facility, and; Diversion Facility, and;

ReRe--operation of San Antonio andoperation of San Antonio andReRe operation of San Antonio and operation of San Antonio and Nacimiento Dams. Nacimiento Dams.

Project Design SummaryProject Design SummaryProject Design SummaryProject Design Summary

O i i l S ill h i ht i El 800 f t NGVD 29O i i l S ill h i ht i El 800 f t NGVD 29Original Spillway height is El 800 feet, NGVD 29Original Spillway height is El 800 feet, NGVD 29

Demolished existing Spillway 15 feet to El 785 feetDemolished existing Spillway 15 feet to El 785 feet

Installed Obermeyer Gate Installed Obermeyer Gate -- Gate height of 12.25 feetGate height of 12.25 feet

Existing Chute & Approach channel walls wereExisting Chute & Approach channel walls wereExisting Chute & Approach channel walls were Existing Chute & Approach channel walls were raised, strengthened and anchoredraised, strengthened and anchored

Bridge pier required strengtheningBridge pier required strengtheningg p q g gg p q g g

HighHigh--Level Gate Operators modifiedLevel Gate Operators modified

C t l h t t dC t l h t t dControl house constructedControl house constructed

Spillway ChuteSpillway ChuteSpillway ChuteSpillway Chute

SpillwaySpillwaySpillwaySpillway

“Obermeyer” Inflatable Gate“Obermeyer” Inflatable GateObermeyer Inflatable GateObermeyer Inflatable Gate

Contract UpdateContract Update

All j t ti ti iti l t d M h 1All j t ti ti iti l t d M h 1All major construction activities were completed March 1, All major construction activities were completed March 1, 2009, ahead of schedule and under budget. Currently, 2009, ahead of schedule and under budget. Currently, closing out contract, will seek project approval from BOD.closing out contract, will seek project approval from BOD.g jg j

Granite ConstructionGranite ConstructionContract AmountContract Amount $9 998 998$9 998 998Contract Amount . . . . . . . . . . . . . . . .Contract Amount . . . . . . . . . . . . . . . . $9,998,998$9,998,998Final Construction Cost . . . . . . . . . Final Construction Cost . . . . . . . . . . . . . $10,040,287. . . . $10,040,287

C t S iC t S iCost SavingsCost SavingsAgency receive credits from unused construction Agency receive credits from unused construction contingency, and from Obermeyer and Engineering contingency, and from Obermeyer and Engineering contracts. Totals approximately $1Mcontracts. Totals approximately $1M

NACIMIENTO DAM NACIMIENTO DAM SPILLWAY MODIFICATION SPILLWAY MODIFICATION

PROJECT SUMMARYPROJECT SUMMARYPROJECT SUMMARYPROJECT SUMMARY

SALINAS RIVER SALINAS RIVER DIVERSION FACILITY DIVERSION FACILITY PROJECT SUMMARYPROJECT SUMMARYPROJECT SUMMARYPROJECT SUMMARY

Salinas RiverDiversion FacilityDiversion Facility

General Project TimelineGeneral Project TimelineGeneral Project TimelineGeneral Project Timeline

• Environmental Approvals 2001 – 2007 • EIR/EIS State Fed Local Permits• EIR/EIS, State, Fed, Local Permits

• SVWP Ballot Approval 2003 • SRDF Design 2004 – 2008• SRDF Design 2004 – 2008• Construction 2008 – 2009• Operation 2010• Operation 2010

DiscussionDiscussion Blended Recycled Water DiscussionDiscussion y& Chlorinated River Water

to Service Area

Recycled Water Plant

River Water Screen StationRiver Water Chlorination S t

General layout of Salinas River Diversion FacilityGeneral layout of Salinas River Diversion Facility

System

March 2008

River Water Filter Screen StationRiver Water Filter Screen StationPrior to Chlorination

1/8/10

River Water Chlorination System1/8/10

River WaterWater

ChlorineInjectionBuilding

Recycled Water Pond

Contract UpdateContract Update

All j t ti ti iti l t d J 15All j t ti ti iti l t d J 15All major construction activities were completed January 15, All major construction activities were completed January 15, 2010. Operation to begin April 2010.2010. Operation to begin April 2010.

Anderson Pacific Engineering Construction, Inc.Anderson Pacific Engineering Construction, Inc.Contract Amount . . . . . . . . . . . . . . . $11,036,100Contract Amount . . . . . . . . . . . . . . . $11,036,100Final Construction Cost (Estimated)Final Construction Cost (Estimated) $13 900 000$13 900 000Final Construction Cost (Estimated) . . Final Construction Cost (Estimated) . . . . . . $13,900,000. . . . $13,900,000

Cost IssuesCost IssuesD il f d tiD il f d tiDam soil foundationDam soil foundation

Salinas Valley Water ProjectSalinas Valley Water Project

M l Q d S i W t R E iManuel Quezada, Senior Water Resources Engineer Chris Moss, Senior Water Resources Engineer

Monterey County Water Resources Agency893 Blanco Circle, Salinas, CA 93901

831.755.4860831.755.4860

www.mcwra.co.monterey.ca.us