A Mitigated Negative Declaration document has concluded concludes that with mitigation measures, replacing the highway bridge over the San Dieguito River would not have a significant effect on the environment.
As planned, the new bridge would accommodate one traffic lane in each direction and bike lanes and sidewalks on both sides. With fewer pilings than the existing structure, the replacement bridge would improve the hydrology of the river and the ecology of the environmentally-fragile wetlands.
A 36-month construction program is expected to begin in January 2025. Beach access will be maintained during construction.
Located north of Sandy Lane and south of Via de la Valle, the existing bridge was built in 1932, widened in 1953, and modified in 2001. In 2010, a study identified corrosion and vulnerability to earthquakes and recommended replacement as the most cost-effective solution.
Early estimates place construction costs at $25 million to $28 million, of which nearly 90 percent would be eligible for federal reimbursement.
Caltrans is preparing separate documents to address project compliance with federal environmental laws for release by October. Permits must also be secured from a half-dozen state and federal resource agencies.
Open the Mitigated Negative Declaration