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Name:	Sweetwater Authority
Address:	505 Garrett Avenue
City:	Chula Vista	Zip:	91910
Phone(Work):	Erick Del Bosque (619)-409-6752	Phone(Cell):
Email:	edelbosque@sweetwater.org	Fax:

Name:	Erick Del Bosque
Address:	505 Garrett Avenue
City:	Chula Vista	Zip:	91910
Phone(Work):	619-409-6752	Phone(Cell):
Email:	edelbosque@sweetwater.org

General information regarding potential basin boundary modification process is posted or will be posted.

• https://www.sweetwater.org/265/Groundwater

• The City of San Diego Public Utilities Department and Sweetwater Authority (collectively, the parties) propose this application to the California Department of Water Resources (DWR) to make minor refinements to the boundaries of the Coastal Plain of San Diego groundwater basin, DWR Basin 9-033. The parties are considering opportunities for locally managing the groundwater resources of the San Diego Formation aquifer, utilizing management tools authorized by California's Sustainable Groundwater Management Act (SGMA) of 2014 and subsequent amendments. In general, SGMA provides authority for local entities to form Groundwater Sustainability Agencies (GSA), which in turn adopt Groundwater Sustainability Plans (GSP) for long-term sustainable management and protection of the groundwater resource. In 2016, the parties submitted an application to DWR to recognize the San Diego Formation aquifer system as an official groundwater basin of the state, and to consolidate into that basin the boundaries of three DWR-recognized alluvial groundwater basins: Lower Sweetwater River Valley, Otay River Valley, and Tijuana River Valley). DWR approved the application, and designated the new consolidated basin as the Coastal Plain of San Diego Basin, DWR Basin 9-033. This is the basin which the parties now propose to modify with the current application. The principal elements of the proposed boundary modification are as follows: Exclusion of South Bay Salt Ponds / New Silver Strand Delineation: The modification removes the south San Diego Bay salt ponds that were inadvertently included in the original boundary. The revised south bay boundary corresponds with the municipal boundary of the City of Imperial Beach. The proposed modification also moves the cutoff line of the Silver Strand peninsula southward, aligning this with the southern end of the bay and extending westerly to the Pacific Ocean along the municipal boundary of the City of Imperial Beach. Scientific Basis: The exclusion of the salt ponds moves the basin boundary to exclude reclaimed land forming the south margin of San Diego Bay. As shown in Figure 1, the promontory of land proposed for exclusion is bordered by the Pacific Ocean and reclaimed land along the Bay. There is a high potential for groundwater-seawater interconnection in this shoreline setting, such that the potential for economic utilization of this part of the basin is compromised. There is no clear geohydrologic basis for drawing the Silver Strand cutoff line in a particular precise location, and the delineation proposed is as scientifically reasonable as the previous delineation.

• 9-033 COASTAL PLAIN OF SAN DIEGO

Uploaded document: Figure 1 Proposed 2018 BBM.pdf