Urban Stormwater / Water Quality

Recharge basin in
the San Timoteo Watershed

San Timoteo Watershed Management Authority

In 2001, the San Timoteo Watershed Management Authority (STWMA) was formed by the City of Beaumont, Beaumont-Cherry Valley Water District, South Mesa Water Company, and Yucaipa Valley Water District. The purpose of the project is to produce an urban stormwater and dry-weather management program as part of the larger San Timoteo Watershed Management Program. Other components of the San Timoteo Watershed Management Program include the protection and enhancement of groundwater quality, direct use and recharge of recycled water, stormwater recharge, minimization of the use of State Project Water in general and potentially eliminating the use of State Project Water during drought periods; conjunctive use; and creation/restoration of wetland and riparian habitat

The project included a two-year field program; development and application of modeling tools to characterize future surface water quality and quantity problems, and to analyze solutions; and the development of a two-prong stormwater and dry-weather discharge management strategy. The two-prong approach included the development of both a regional stormwater management program and a localized treatment and stormwater management program. The regional stormwater management program included a master plan of channel works, wetlands, and stormwater extended detention/infiltration facilities. The localized treatment and stormwater management program was developed with and adopted by local agencies with jurisdiction over land use planning. It included the development of best management practices (BMPs) that would be used by the local agencies in the STWMA area.

The purpose of these activities was to identify the current dry-weather and stormwater runoff management regulations, practices and policies, and to obtain information to use with modeling tools to characterize the current and projected future water quality and quantity due to projected changes in land use.

Additional Information

• Full Description
• Reports
• Maps & Figures
• Images
• Presentations