Hillcrest Boulevard Storm Drain Improvements


City of Millbrae, CA


  • Civil & Structural Design

A portion of Hillcrest Boulevard includes a vertical sag. During heavy storm events the existing storm drain system would become overwhelmed and the excess water would flow over the sidewalk and down the driveway of a home on the downhill side of the street causing flooding and damage. To alleviate the drainage issue, a parallel 24” storm drain system was installed to increase the system capacity beyond the 10-year frequency storm design of the existing system. The improvements include approximately 900 lf of new 24” RCP storm drain pipe, new manholes and a new drain inlet. CSG provided analysis, preparation of design documents and construction support for this $1.0 million project.

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