Pacoima Spreading Grounds was built in the 1930s and is one of the major water conservation facilities that provide groundwater recharge for the San Fernando Basin. Currently, the spreading grounds' percolation rate is reduced due to a low permeability clay layer underlying the infiltration basins. The proposed project will increase the spreading grounds' storage capacity and percolation rate and simplify operations by combining basins and constructing new interbasin structures.
The proposed project will result in increased groundwater recharge in the San Fernando Groundwater Basin. Primary project objectives include:
Increasing the percolation rate from 65 cfs to 140 cfs by removing existing clay layers underlying the spreading basins;
Expanding the storage capacity of the spreading basins from 530 acre-feet to 1,200 acre-feet by combining and slightly deepening the existing 12 spreading basins by approximately 5 to 10 feet;
Eliminating potential localized flooding risk by replacing the intake canal with RCPs; and
Creating 6.5 acres of additional open space by replacing the intake canal with RCPs.
This project is funded by a State Proposition 84 grant through IRWMP, the Los Angeles Department of Water and Power, and the Los Angeles County Flood Control District.
The Draft Mitigated Negative Declaration was released on January 11, 2016 for a 45 day public review and comment period. Comments are due by 5PM on February 25, 2016.
A public meeting will be held at 7PM on January 28, 2016 at the Laborers' Local 300 Union Hall located at 14800 Devonshire Street, Mission Hills, CA.