Lower Santa Ana River
Improvements to 23 miles of existing channel from Weir Canyon Road to the Pacific Ocean include channel widening, improvement to the existing Greenville-Banning Channel located parallel to the river…
Flood Programs
Flood Programs is comprised of Floodplain Management, Hydrology and the Santa Ana River Section. Floodplain Management consists of preparing facilities studies; assisting other OCPW…
Building Permit Information
A building permit provides you formal permission to begin construction of a building project in accordance with the approved permit documents (i.e. drawings, calculations, specifications). We…
OM GIS Maps
O&M has GIS maps that depict the County’s maintained roadways and flood control facilities. These maps are used to monitor and manage maintenance activities and projects. …
Dams
Seven Oaks Dam Seven Oaks Dam is one of the largest earth and rock-filled dams in the world. It is as high as a fifty story building and ten football fields in length from side to side. Situated…
Holiday Schedule
The OC Public Works facilities will be closed on the following Observed 2020 Holidays: * Indicates the observed date differs from the actual date of the holiday. 2020 HOLIDAY…