FACT SHEET TEMPLATE FOR WATER SUPPLY ALTERNATIVES

 

MPWMD Special Workshop, August 25, 2011

 

Alternative Type: Aquifer Storage and Recovery (ASR)

Project Name: Water Project 1, Santa Margarita site ASR-1 and ASR-2 Wells

Project Sponsors: MPWMD in partnership with Cal-Am (prepared by Joe Oliver)

Location: 1910 General Jim Moore Boulevard, Seaside map on reverse side

Project Description: Divert and treat water from Carmel River system in wet season; transport water via pipeline to inject in Seaside Groundwater Basin for later recovery in dry season.

 

ATTRIBUTE

ESTIMATES

NOTES and COMMENTS

 

YIELD (AFY)

920 (average year)

Yield would vary from negligible in extremely dry year to maximum of 2,426 AF in extremely wet year.

COST

 

 

$1.75 million - Feasibility testing

$4.57 million - Project expenditures to date

$1.91 million estimated cost to complete project

Based on MPWMD actual costs from project concept development in 1996 through Fiscal Year 2010-11, and estimated future expenditures to complete project permanent facilities. Costs include planning, design, permitting, engineering, construction and construction management. MPWMD staff and legal support not included.

TIMELINE

 

2005 began permanent project

2012 anticipated completion of major facility construction

Project began full-scale operations in 2008, although all permanent facilities have not been completed. Remaining facilities include: electrical and HVAC equipment in facility building; PG&E power upgrade; minor site expansion for pipelines; final grading, fencing, paving.

PERMITS AND APPROVALS

*Federal, State, Regional, Local Jurisdictions

All federal, state, regional, local permits acquired, with exception of FORA and City of Seaside authorization for final pipeline connections

 

Partial list of authorizing and permitting agencies:

 

US Army, NMFS, USEPA, SWRCB, CDFG, RWQCB, CDPH, MCDEH, FORA, City of Seaside

PROS AND CONS

 

 

*Benefits

 

 

*Reliable, known

technology;

*Technology has been proven in local setting;

*Project relies primarily on existing water delivery infrastructure;

*Project cost.

 

*Provides environmental benefit to Carmel River system by reducing the volume of water extracted during low-flow summer periods when water extraction impacts are greatest;

*Provides offset to volume of unpermitted diversions from Cal-Am system under SWRCB orders;

*Provides ancillary benefits to Seaside Groundwater Basin by seasonal increased storage volume in basin and improved water quality relative to native basin water.

*Drawbacks

 

 

*Project yield limited by Carmel River bypass flow requirements;

*Project requires ongoing operational and monitoring commitment requirements;

*Project requires multiple water treatment at diversion and recovery.

 

*Little to no excess water may be available for diversion to storage in certain dry or extremely dry years;

*Project requires intensive operations management to ensure successful performance, including water quality considerations;

*Project located on former Fort Ord land requiring multiple levels of jurisdiction coordination and approval;

*Project is located near urbanized area with visual and sound sensitivity issues.

*Water recovery increases costs to delivery system in dry season.

 

 

Santa Margarita ASR Site

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