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| Salinas Valley Basin Groundwater Sustainability Plan | |
|---|---|
| Name | Salinas Valley Basin Groundwater Sustainability Plan |
| Region | Salinas Valley, Monterey County, California |
| Agency | Local Agency Formation Commission |
| Status | Implemented |
Salinas Valley Basin Groundwater Sustainability Plan
The Salinas Valley Basin Groundwater Sustainability Plan is a regional groundwater management document developed for the Salinas Valley in Monterey County, California, responding to state requirements established by the Sustainable Groundwater Management Act and coordinated among local water agencies, agricultural interests, and environmental organizations. It integrates hydrologic science, regulatory frameworks, and stakeholder-driven governance to address groundwater overdraft, seawater intrusion, and ecological impacts in the watershed that drains to the Monterey Bay National Marine Sanctuary and flows through the Salinas River. The plan situates local action within broader policy contexts including the California Department of Water Resources, the State Water Resources Control Board, and regional partners such as the Monterey County Water Resources Agency.
The plan covers the Salinas Valley groundwater subbasin, overlapping municipal jurisdictions including the cities of Salinas, California, King City, California, Moss Landing, California, and Greenfield, California, as well as unincorporated communities and federal lands including parts of the Fort Ord National Monument footprint. It identifies sustainable yield targets, measurable objectives, and interim milestones consistent with the Sustainable Groundwater Management Act timeline, and coordinates with infrastructure entities such as the Monterey One Water wastewater agency and agricultural trade groups like the Grower-Shipper Association of Central California.
The plan responds to chronic groundwater overdraft documented in historical studies by the United States Geological Survey and regional analyses by the California State Water Resources Control Board. Drivers include irrigated agriculture dominated by operations tied to the Salinas Valley lettuce industry, urban growth in Salinas, California, and groundwater extraction patterns influenced by irrigation districts such as the Salinas Valley Water Project participants. Objectives align with state law from the California Legislature and guidance issued by the California Department of Water Resources to halt undesirable results such as land subsidence, reduced groundwater storage, degraded water quality including seawater intrusion, and harm to groundwater-dependent ecosystems like riparian corridors along the Salinas River.
The plan is administered by one or more Groundwater Sustainability Agencies formed under state law, bringing together local special districts such as the Monterey County Water Resources Agency, municipal agencies from Salinas, California, and community water systems. Key stakeholders include agricultural businesses represented by the Agricultural Council of California and local growers, environmental organizations including the Monterey Bay Aquarium, state regulators such as the California Department of Fish and Wildlife, and federal entities like the United States Bureau of Reclamation. Tribal interests include federally recognized tribes and California Native American groups with ties to the Salinas watershed. Coordination bodies reference legal authorities including the Public Resources Code (California) and procedural guidance from the California Environmental Quality Act.
Core components include quantified sustainable yield calculations, pumping reduction measures, recharge enhancement projects, and demand management strategies. Management actions entail conjunctive use projects with existing reservoirs and recycled water from agencies like Monterey One Water, managed aquifer recharge using seasonal flood flows from the Salinas River, and well permitting and replacement programs coordinated with county planning offices. Water quality actions address nitrate management consistent with directives from the State Water Resources Control Board and monitoring for constituents regulated under the Safe Drinking Water Act, administered locally by county health departments. Agricultural best management practices promoted include irrigation efficiency technologies common in operations tied to the Salinas Valley agriculture supply chain.
The plan relies on a monitoring network of observation wells, surface-water gauges, and subsidence surveys informed by datasets from the United States Geological Survey, satellite-based remote sensing programs such as InSAR, and groundwater modeling platforms used by the California Department of Water Resources. Hydrogeologic characterization references the Salinas Valley aquifer system mapping, heads and transmissivity estimates, and groundwater flow models calibrated with historical pumping records and climate scenarios from the National Oceanic and Atmospheric Administration and regional climate studies linked to the California Climate Change Assessment. Data-sharing agreements involve state databases and local GIS systems maintained by county agencies.
Implementation follows staged milestones set under the Sustainable Groundwater Management Act, with initial submittal, periodic five-year updates, and actions intended to achieve sustainability within 20 years of plan adoption. Funding sources include local assessments, state grants administered by the California Department of Water Resources, federal cost-share programs from the United States Department of Agriculture and the Bureau of Reclamation, and capital contributions from participating water districts. Project-level agreements may leverage bond financing authorized by county boards and grant programs such as those administered through the Environmental Protection Agency and California's integrated regional water management funding.
Contested issues include balancing groundwater allocations among large agribusinesses associated with the Salinas Valley agriculture economy, municipal suppliers like Cal-Am Services-served systems, and environmental priorities advanced by organizations such as the National Marine Fisheries Service and The Nature Conservancy. Technical disputes often center on sustainable yield estimates, modeled impacts on seawater intrusion, and the social equity of fee structures impacting disadvantaged communities recognized under state law. Political and legal challenges have involved litigation referencing state statutes and administrative actions by bodies such as the State Water Resources Control Board and have prompted negotiations among local agencies, tribal representatives, and federal partners.
Category:Water management in California