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Dr. Robert Gross Groundwater Recharge Pond Fish Screen Project

Dr. Gross Ponds pic

Pond 1A at the water district’s Dr. Robert W. Gross Groundwater Recharge Ponds

Named for water district board director Robert Gross, who served 16 years on the board from 1984 to 2000, the ponds are located near the intersection of Penitencia Creek Road and Noble Avenue in north San Jose. These ponds consist of one sedimentation pond and four recharge ponds. The water district uses the ponds to recharge the groundwater and supply water to other recharge ponds downstream and along Upper Penitencia Creek.  

The water district imports water from the Sacramento River Delta to the ponds. The imported water recharged into the underground aquifer here is an important element of the water supply for the valley's east side.    

In March 2012, the water district completed a five month long project at one of the ponds - known as Pond 1A - to install a self-cleaning fish screen at the outlet pipe, aimed at protecting the wildlife habitat of Upper Penitencia Creek. The existing pipe did not have a fish screen to prevent exotic fishes in the pond from entering the creek. Introducing exotic species there could lead to ecological degradation of the watershed for native species through competition, predation, habitat interference, disease transfer and hybridization. 

Pond location

Map showing location for the fish screen


 For more information on this project, please contact Engineering Unit Manager Ngoc Nguyen at (408) 265-2607, ext. 2632 or by email at: