San Diego Association of Governments (SANDAG)’s Mid-Coast Corridor Transit Project will extend trolley service from Santa Fe Depot in Downtown San Diego to the University City community, serving major activity centers such as Old Town, the University of California, San Diego, and University Town Center. Nine new stations will be installed, connecting the communities of Pacific Beach, Clairemont, and Linda Vista. The project will expand transportation capacity, particularly during peak period commuting periods.

For the project design phase, MARRS provided constructability review and storm water NPDES compliance services as part of the project management team. This included reviewing the project design plans and reports prepared by the design team including Basis of Design, General Design Criteria, Hydrology Runoff Evaluation, Structure Type Selection and Location, Hydraulic Study Reports, Special Provisions, HEC-RAS Models, Station Plans, and related civil work. Our constructability services included review of all civil, utility and drainage plans and specifications. MARRS prepared the Regional MS4 Permit Implementation and Project Schedule Effects Evaluation Technical Memorandum and participated in developing strategy for the stormwater compliance and related design criteria for project design and construction. MARRS prepared a white paper to present the effects of permit implementation to the San Diego Association of Governments management. The white paper included a comparison of new and old MS4 Permits, design elements required under the old permit and the significant changes that would be required if the Mid-Coast project has to comply with the new permit, and the cost impact of the new requirements.

SANDAG was greatly able to reduce construction costs and change orders due to the constructability review and interdisciplinary verification of all disciplines. The project document review verified the design criteria and analysis was performed correctly, ensuring the final design process was not delayed.

Project Features:
• Light Rail
• Stations
• Park & Ride