Alleyway Drainage Improvements
City of Alameda | Alameda, CA
Situation: Constructed in the early 1930s, Alameda Theater has enjoyed serving as the City of Alameda’s hub of social activity for close to a century. Over the past decade, the theater experienced hard times with deferred maintenance and extensive water damage due to nuisance storm water and poor drainage in the alleyway. The City of Alameda’s Redevelopment Agency proposed an extensive facelift of the historic Alameda Theater district including building a new Cineplex, site improvements, and new parking structure.
Special Challenges: Pakpour Consulting Group’s (PCG) biggest challenge was the design of the runoff conveyance to the gutter along Central Avenue. Since Central Avenue has no longitudinal storm drains, all runoff is conveyed along the street’s gutters. PCG solved the limitation by incorporating a shallow trench drain system to transport the water flow to the curb and gutter on Central Avenue and modified the site grades to allow for overland drainage release in the event of trench drain failure.
Services Overview: PCG was retained by the City of Alameda to provide civil design and storm water services to improve the drainage and eliminate the water intrusion problems along the alleyway at the rear of the historic theater. Our services included completing a drainage study to determine the existing runoff flows and provide conceptual drainage solutions. The final design moved the drainage away from the existing historic buildings and featured the addition of compacted drain rock to provide a pervious surface, a shallow ductile iron storm drain system, concrete valley gutters, and a pre-fabricated pump station.
About City of Alameda: The City of Alameda is located on Alameda Island and Bay Farm Island, adjacent to Oakland and east of San Francisco across the San Francisco Bay. With an estimated population of 79,000, the City is known for wind and kite surfing at Robert W. Crown Memorial State Beach and its Victorian homes.