PGE Potrero Power Station Sediment Remediation

History & Location

The Offshore Sediment Area is a subarea of the Potrero Power Plant Site located along the waterfront in San Francisco’s Central Waterfront Area. Historical upland site uses include industrial activities, a manufactured gas plant (MGP), and power plant activities while historical overwater site uses include dock activities (MGP wharf and sugar refinery wharf) and shipyard (immediately north of the Site). Although the shipyard slipways were later backfilled, concrete piers bracketing the shipways are still present and rails used for marine ship building are still present near the sediment surface. The site will be developed to support residential apartments, commercial office space, retail and recreational open space.

Significant Project Features

• Excavation and stabilization of 6,540 CY of sediment impacted by polycyclic aromatic hydrocarbon (PAHs) from the Offshore Sediment Area
• Demolition of 120 LF of dilapidated steel bulkhead using a 5 to 7 man dive crew
• Site restoration activities, including installation of capping material, reactive core mat placement, and riprap revetment
• Over 31,000 safe workhours without a lost-time incident

Project Gallery