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Too Much H2O- Shipping water to make room in key reservoir

August 6,2017-

Screen Shot 2017-08-06 at 7.41.55 AMDel Puerto Water District (Del Puerto) is a Central Valley Project (CVP) contractor located on the west side of the San Joaquin Valley, south of the Sacramento-San Joaquin Delta (Delta) (Figure 1). Del Puerto’s water supplies have been reduced in recent years because of regulatory limitations and adverse hydrologic conditions. As a result, Del Puerto has acquired substantial quantities of water (CVP and non-CVP) in advance each year, which are currently stored in San Luis Reservoir. However, due to the current wet hydrologic year and high runoff from snowmelt, the San Luis Reservoir has filled and spilt. Del Puerto has requested authorization from the Bureau of Reclamation (Reclamation) to transfer up to 15,000 acre-feet (AF) of its available water supplies currently located in San Luis Reservoir to Arvin-Edison Water Storage District (Arvin-Edison) for storage and later return.

In addition to the severity of the recent drought, Arvin-Edison has extracted more groundwater than could be recharged through precipitation and runoff. Arvin-Edison’s access to CVP water supplies south of the Delta, including San Joaquin River Restoration Program’s (SJRRP) recaptured/recirculated CVP water and Cross Valley Contractors’ CVP water supply, enables Arvin-Edison to return Del Puerto’s water supplies from the Delta when called upon.

Reclamation proposes to approve the transfers of up to 15,000 AF of water between Del Puerto and Arvin-Edison for storage during the 2017 Contract Year and later return as described below.

Del Puerto’s available water supplies (CVP and non-CVP) would be released from San Luis Reservoir and conveyed through the California Aqueduct/San Luis Canal to the Cross Valley Canal where it would be delivered to Arvin-Edison. Arvin-Edison would use the transferred water for direct recharge or to meet in-district demands to offset groundwater extraction.

Any use of State facilities will require coordination and approval by the California Department of Water Resources (DWR). Any use of the Cross Valley Canal will require coordination and approval by the Kern County Water Agency. All approvals will be provided to Reclamation prior to approval of the transfer.

Arvin-Edison would later return a like amount of CVP water to Del Puerto, less 3% for conveyance losses, if applicable, when requested by Del Puerto. The available water supplies would include SJRRP recaptured/recirculated CVP water and/or Cross Valley Contractors’ South-of-Delta CVP water supplies acquired by Arvin-Edison. The CVP water would be delivered to Del Puerto at its existing turnouts off the Delta-Mendota Canal upstream of San Luis Reservoir.

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