View File - Development Services - City of Oxnard

WATER RESOURCES TECHNICAL REPORTof Mugu Lagoon to support an adjacent Naval Air Station. Efforts are currently underwayby the California Coastal Conservancy and other stakeholders to restore a portion of theremnant wetlands to their former extent and quality.2.4.6 Duck ClubThe Ventura County Game Preserve often referred to as "The Duck Club" is a privatehunting club that is located along the southern coastal areas of the Oxnard Plain. The DuckClub maintains several hundred acres of wetlands habitat north of Mugu Lagoon within thehistorical extent of the system of estuarine wetlands that extended over an area from MuguLagoon on the south to Point Hueneme on the north.2.4.7 Industrial and Agricultural DrainsIndustrial and agricultural drains exist on Oxnard Plain that convey poor quality water tocoastal areas that help prevent degradation of shallow groundwater. Industrial drainsinclude the Oxnard Industrial Drain, J Street Drain, and the Rice Road Drain. Agriculturaldrains are located across the Oxnard Plain and Pleasant Valley areas.2.4.8 Coastal Waters and the Pacific OceanThe Pacific Ocean is the ultimate receiving water body for surface waters from the SantaClara Hydrologic Unit. Coastal waters of the Oxnard Plain area include estuaries, lagoons,harbors, beaches, and ocean waters. Estuaries include coastal lagoons such as MuguLagoon, McGrath Lake, and the mouth of the Santa Clara River. Harbors include the deepdraftcommercial harbor at Port Hueneme and Channel Islands Harbor. Recreationalbeaches occur along large stretches of these coastal waters.2.5 Geology2.5.1 TectonicsThe Oxnard Plain is located in the Ventura Basin in the western portion of the TransverseRanges. The tectonics of the western Transverse Ranges is characterized by clockwiserotation and crustal shortening, caused by convergence of the North American and Pacificplates along a northwest-trending segment of San Andreas Fault. Folding and displacementon thrust and reverse faults accommodate this compressional strain, resulting in regionaluplift, mountain formation, basin formation, and seismicity.The Ventura Basin is a deep, structural trough filled with approximately 35,000 feet ofCretaceous through Cenozoic sedimentary and volcanic rocks (Dibblee, 1982). The basinforms the Santa Clara River Valley, Oxnard Plain, and Santa Barbara Channel offshore. Themain synclinal axis of the basin coincides roughly with the course of the Santa Clara River.A series of younger (Quaternary) folds and faults trend east-west across the basin,subparallel to the main synclinal axis. The flanks of the basin were uplifted alongeast-trending, left-lateral reverse fault systems, exposing the older sedimentary and volcanicrocks that form the Santa Ynez Mountains and the Santa Monica Mountains/ChannelIslands; these ranges form the northern and southern boundaries of the basin, respectively(Dibblee, 1982).W112003002SCO LW1458.DOC/ 033390002 13