Coyote Watershed Program

Santa Clara Valley Water District

For nine years, RMC managed the planning and design of a $400-million program for flood protection in the Coyote Watershed to improve natural stream functions and environmental benefits of creeks and streams. Working closely with the District, RMC:

• Provided overall strategic planning, project development, permitting services, and implementation management
• Developed a public outreach program
• Provided oversight of design and construction of all watershed improvement projects
• Served as the prime interface with federal agencies, including the Corps of Engineers and the Natural Resources Conservation Service

Storm Drain Improvements

City of Lancaster

While it only rains 3.6 inches per year in Lancaster, California, the topography can cause localized flooding and the complaint hotline at City Hall to ring off the hook. To address flooding issues in two neighborhoods, RMC:

• Performed hydrology and hydraulic evaluation to delineate the watershed
• Designed 2,600 feet of 54-inch storm drain, including new upstream inlet structures to collect flow from gutters and reroute it underground to a detention basin
• Conduced permitting and coordination with public works and utility agencies

Low Impact Design

San Francisco Public Utilities Commission

RMC helps achieve sustainable storm water management through low impact design (LID) approaches that can help mitigate the effects of urbanization on stormwater. We completed two LID projects for San Francisco where we:

• Strategized where integrating LID into various streetscape initiatives would reduce the volumes and peak flows of stormwater entering the combined sewer system, alleviate flooding, and contribute to neighborhood greening
• Developed conceptual design for the number, type, location, and size of LID features that could reasonably be implemented
• Identified potential opportunities for coordination with other City programs

Storm Drain Evaluation and Stormwater Infiltration Site Conceptual Design

City of Daly City

Following our study to address flooding issues at the primary stormwater drainage canal for Daly City, RMC was hired to develop a storm drain evaluation for the City. RMC:

• Verified and calibrated the existing hydraulic model
• Used the calibrated model to identify pipeline deficiencies and develop alternatives to address the deficiencies
• Created conceptual designs for a multi-benefit underground retention/infiltration basin at a site in Daly City where frequent flooding occurred
• Evaluated of state-of-the-art Best Management Practices for retention and infiltration

Malibu Legacy Park Integrated Stormwater, Wastewater, and Recycled Water Project

City of Malibu

RMC planned and designed the Legacy Park project—a multi-benefit clean water project that improves water quality and protects and restores natural resources. RMC:

• Incorporated vegetated stormwater detention basins, intermittent wetlands, and riparian habitat on 15 acres
• Developed innovative system to convey pollutant-loaded stormwater away from Malibu Creek and into the City’s stormwater treatment facility
• Successfully obtained a $2-million grant for the stormwater treatment system
• Coordinated with Los Angeles County on standards for stormwater reuse and separation criteria
• Developed a continuous simulation model to determine pumping improvements and detention basin sizing required to meet Pathogen TMDL requirements

Learn more about the Legacy Park: www.malibulegacy.org or click here to view a detailed PDF about additional Legacy Park features and highlights.
Legacy Park featured in Civil Engineering magazine

Stream Management Master Plan

Zone 7 Water Agency

RMC developed a Stream Management Master Plan (SMMP) to address flood control and drainage issues as well as other objectives for 39 miles of creeks and channels in eastern Alameda County. The development of the SMMP was a collaborative process involving the public, stakeholder groups and other local agencies whose operations affected the streams and arroyos. The plan:

• Addresses flood control and drainage concerns as well as water supply, erosion and sediment, water quality, habitat, recreation, and public education issue
• Includes 48 projects such as off-stream detention storage to reduce peak flood flows
• Preserves riparian resources