Golf Club Drive Green Street Project

Water Quality Project | Construction start October 2026

The County of San Diego recently began construction on a Green Street improvement project located at the intersection of Golf Club Drive and Old River Road in Bonsall. The purpose of this project is to improve local water quality while enhancing pedestrian and motorist safety at the intersection.

The improvements include the installation of four biofiltration basins, which are landscaped areas that naturally clean stormwater before it reaches local creeks. The new stormwater features will filter stormwater runoff and help protect Moosa Creek and the San Luis Rey River.

Additionally, the project will install new sidewalk, a pedestrian crossing, and ADA-compliant curb ramps at each corner of the intersection. The following images show the site layout with the planned improvements and a biofiltration basin example diagram.

The San Luis Rey Watershed is affected by bacteria and other pollutants. Learn more on Project Clean Water.

Construction: What to Expect

Construction is expected to take approximately eight months to complete.

Please note that construction dates are subject to change due to compliance requirements, inclement weather, and/or other unforeseen circumstances.

During construction, the County will make every effort to minimize disruptions in the surrounding area. While most work will occur within the public road right-of-way, temporary access to private property will be needed in some cases. There will be temporary impacts to utilities, and to both vehicular and pedestrian traffic. Traffic control measures, including signage placed prior to and during construction, will be implemented to ensure the safety of our customers.

Motorists and pedestrians should anticipate potential traffic delays, limited pedestrian access, and impacts to street parking near Basin #1 on Old River Road.

The County of San Diego Project Manager for this project is Clint Boschen. Contact information for Mr. Boschen is provided below: