MONTERY COUNTY 2005 GENERAL PLAN UPDATE STUDY SESSION – WATER RESOURCES May 19, 2005.

MONTERY COUNTY2005 GENERAL PLAN UPDATE

STUDY SESSION – WATER RESOURCESMay 19, 2005

Introduction – GPU Water Issues

Regional Water supplyRegional Water supply Use and demandUse and demand Management and governanceManagement and governance Challenges Challenges SolutionsSolutions

What is an Acre-Foot?

One water measurement is an acre-foot (AF) One water measurement is an acre-foot (AF)

One acre-foot = 326,000 gallonsOne acre-foot = 326,000 gallonsCovers one acre, one foot deepCovers one acre, one foot deepOr about one football field to one foot deepOr about one football field to one foot deep

In general, two or three households use about one In general, two or three households use about one acre-foot of water per yearacre-foot of water per year

Monterey County Water UseMonterey County Water Use

Total Estimate 600,000 acre-ft

Urban60,000 acre-ft

Agriculture540,000 acre-ft

Monterey County Water UseMonterey County Water Use

Salinas Valley550,000 acre-ft North County

31,000 acre-ft

Peninsula15,000 acre-ft

Monterey Water Supply

Monterey County has ample water suppliesMonterey County has ample water supplies

Over 400,000 ac-ft of undeveloped Over 400,000 ac-ft of undeveloped surafce watersurafce water

Issue is how to manage the supplies we Issue is how to manage the supplies we havehave

Develop better distribution infrastructure Develop better distribution infrastructure

Monterey County: Monterey County: Total Available HTotal Available H22O - 1,000,000 ac-ftO - 1,000,000 ac-ft

Envi

ronm

enta

l ?

Env

ironm

enta

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UndevelopedUndevelopedSurface WaterSurface Water400,000 ac-ft400,000 ac-ft

DevelopedDevelopedWater SourcesWater Sources600,000 ac-ft600,000 ac-ft

Average Annual Outflow:60,000 AF

Average Annual Outflow:250,000 AF

Average Annual Outflow:100,000 AF

Surface Water Supplies

Groundwater is the PrimarySource of Supply and Storage

Reservoir Reservoir ReleasesReleases

95%95%Ground WaterGround Water

Con

serv

atio

nC

onse

rvat

ion

5%5%

Monterey County: Monterey County: CurrentCurrent Developed Developed

Surface WaterRecycled WaterDesalination

Urban Water Resource Challenges

Salinas Valley Groundwater BasinSalinas Valley Groundwater Basin 9,000 acft Seawater Intrusion9,000 acft Seawater Intrusion

MCWD/FOR AMCWD/FOR A groundwater quality and augmentation groundwater quality and augmentation

No Mo Co (PVWMA and WRA)No Mo Co (PVWMA and WRA) 15,000 acft overdraft15,000 acft overdraft

Salinas and Valley CitiesSalinas and Valley Cities water quality concernswater quality concerns

MPWMDMPWMD 10,730 acft draw without water rights10,730 acft draw without water rights Seaside basin in overdraftSeaside basin in overdraft

Reservoir Reservoir ReleasesReleases

Conse

rvat

ion

Conse

rvat

ion

95%95%Ground WaterGround Water

5%5%Surface WaterRecycled WaterDesalination

Monterey County : Monterey County : FutureFuture Developed Developed

GPU Policy Consideration

Develop infrastructure to better manage the Develop infrastructure to better manage the water supplies we havewater supplies we have

Regional water supply solutions Regional water supply solutions Eliminate overdraft and seawater Eliminate overdraft and seawater

intrusionintrusion Enhance our groundwater resourcesEnhance our groundwater resources Develop new supplies Develop new supplies

Develop IRWMP and CIPDevelop IRWMP and CIP

Salinas Valley Water Project

Critically needed infrastructure Critically needed infrastructure Spillway ModificationSpillway Modification Surface DiversionSurface Diversion Reservoir Re-opReservoir Re-op Cost $18.8 milCost $18.8 mil

Regional Desal Transmission Pipeline &Facilities

Water Resource Governance

Water Resource ManagementWater Resource Management Monterey County Water Monterey County Water

Resources AgencyResources Agency Monterey Peninsula Water Monterey Peninsula Water

Management DistrictManagement District Pajaro Valley Water Management Pajaro Valley Water Management

AgencyAgency

REGIONAL WATER SUPPLY

Support programs to secure and protect the Support programs to secure and protect the County's water resources.County's water resources.

Reduce overdraft and seawater intrusion Reduce overdraft and seawater intrusion and bring the groundwater basins into and bring the groundwater basins into balance.balance.

Develop Capital Improvement Plan to Develop Capital Improvement Plan to address regional needs.address regional needs.

DISTRIBUTION ELEMENTS

Identify needs - to improve local Identify needs - to improve local distribution (minimize mutual water distribution (minimize mutual water companies).companies).

Capacity to maintain (TMF).Capacity to maintain (TMF). Support consolidation.Support consolidation.

Water Purveyors Water PurveyorsWater Purveyors

PVWMAPVWMA AromasAromas Pajaro Sunny Mesa Pajaro Sunny Mesa Cal Water Cal Water ALCO Water ALCO Water California-American Water California-American Water Castroville Water DistrictCastroville Water District Marina Coast Water DistrictMarina Coast Water District PBCSD/CAWDPBCSD/CAWD MCWRAMCWRA

NoMoCo Water Management Plan

PVWMA and WRA have need for PVWMA and WRA have need for improved distribution improved distribution PVWMA – Basin Management Plan PVWMA – Basin Management Plan

2002 with recycled water and imported 2002 with recycled water and imported state waterstate water

WRA – NoMoCo plan for the Salinas WRA – NoMoCo plan for the Salinas watershed watershed

Springfield Ag Irrigation Project

4

CSIP Extension

5

Water Supply System Consolidation

PrunedaleArea Only

6

System Consolidation with New Wells

7

FLOOD MANAGEMENT PROGRAM

Salinas River near Las Palmas Ranch, 1995

Lower Carmel River, 1998

Pajaro River, 1995

TOTAL COSTS OF PRIOR PROJECTSOctober 2002

Approximate Project CostsApproximate Project Costs

Salinas River Salinas River $ 9,000,000$ 9,000,000

Carmel RiverCarmel River 8,000,000 8,000,000

Pajaro River Pajaro River 100,000,000 100,000,000

Other Other 120,000,000120,000,000

Total Costs Total Costs $237,000,000$237,000,000

FLOOD MANAGEMENT PROGRAM Establish policies to minimize impacts to Establish policies to minimize impacts to

flood prone areas (flood plains).flood prone areas (flood plains). Establish mitigation measures and design Establish mitigation measures and design

requirements to reduce flood risks.requirements to reduce flood risks. Include flood prevention facilities in a Include flood prevention facilities in a

Capitol Improvement Plan.Capitol Improvement Plan.

STORM WATER RUNOFF MANAGEMENT

Develop performance standards (BMPs).Develop performance standards (BMPs). Design and construction of facilities should Design and construction of facilities should

reduce peak storm flows and provide water reduce peak storm flows and provide water quality benefits.quality benefits.

Work with County Cities to implement our Work with County Cities to implement our Regional Storm Water Phase II Program.Regional Storm Water Phase II Program.

DRAINAGE AND EROSION

Inventory areas of the County that have Inventory areas of the County that have high probability of erosion, sedimentation high probability of erosion, sedimentation and chemical pollutionand chemical pollution

Require drainage and erosion management Require drainage and erosion management plans, best management practices and plans, best management practices and drainage improvements for developmentdrainage improvements for development

Require regular maintenance of drainage Require regular maintenance of drainage improvementsimprovements

RECOMMENDATIONS

WATERWATER

RESOURCESRESOURCES

DEVELOPMENT OF WATER RESOURCES (1 of 2)

1.1. Coordinate and collaborate with all agencies responsible Coordinate and collaborate with all agencies responsible for the management of existing and new water resources.for the management of existing and new water resources.

2.2. Develop a program to eliminate overdraft it its water Develop a program to eliminate overdraft it its water basins through a variety of strategies to be included in a basins through a variety of strategies to be included in a Capital Improvement Program (CIP) including water Capital Improvement Program (CIP) including water banking, groundwater and aquifer recharge and banking, groundwater and aquifer recharge and recovery, desalination, pipelines to new supplies and a recovery, desalination, pipelines to new supplies and a variety of conjunctive use techniques (consistent with variety of conjunctive use techniques (consistent with Health and Safety Regulations). Health and Safety Regulations).

3.3. As part of an overall conservation strategy and to As part of an overall conservation strategy and to improve water quality, the County shall encouraging improve water quality, the County shall encouraging taking development on erosive soils out of production.taking development on erosive soils out of production.

DEVELOPMENT OF WATER RESOURCES (2 of 2)

4.4. The County Building Division shall establish The County Building Division shall establish guidelines that integrate National Greenbook guidelines that integrate National Greenbook construction materials and fixtures that contribute construction materials and fixtures that contribute to increased levels of water conservation.to increased levels of water conservation.

5.5. Water recycling including dual plumbing shall be Water recycling including dual plumbing shall be for outdoor irrigation only. A cross-connection for outdoor irrigation only. A cross-connection control program to provide regulatory oversight is control program to provide regulatory oversight is needed. needed.

6.6. The use of grey water for commercial landscaping The use of grey water for commercial landscaping purposes shall require a discretionary permit. purposes shall require a discretionary permit.

FLOOD MANAGEMENT

7.7. County Flood Management Program shall include:County Flood Management Program shall include: Mapping of floodplain and high risk areasMapping of floodplain and high risk areas Establish policies to keep intensive uses out of flood prone areasEstablish policies to keep intensive uses out of flood prone areas Establish mitigation measures and design requirements to reduce Establish mitigation measures and design requirements to reduce

flood risksflood risks Incorporate local and regional flood management plans and Incorporate local and regional flood management plans and

facilitiesfacilities Construct flood prevention facilities where fundableConstruct flood prevention facilities where fundable Employ both structural and non-structural solutions to maintain Employ both structural and non-structural solutions to maintain

floodplain functions of sedimentation, deposition, water filtering floodplain functions of sedimentation, deposition, water filtering and flood water absorption and flood water absorption

8.8. Develop runoff performance standards that result in an array of site Develop runoff performance standards that result in an array of site planning and design techniques. These techniques should reduce storm planning and design techniques. These techniques should reduce storm flows, capture and recharge runoff water. Design and construction of flows, capture and recharge runoff water. Design and construction of facilities should reduce peak storm flows and provide water quality facilities should reduce peak storm flows and provide water quality benefits. benefits.

DRAINAGE AND EROSION

9.9. Inventory areas of the County that have a Inventory areas of the County that have a high probability of erosion, sedimentation high probability of erosion, sedimentation and chemical pollution.and chemical pollution.

10.10. Require erosion management plans for Require erosion management plans for development in these areas.development in these areas.

11.11. Require drainage improvements as a Require drainage improvements as a condition of project approval.condition of project approval.