South San Francisco City Council
December 11, 2024

Colma Creek Trash Capture
South San Francisco City Council
December 11, 2024
Background
• San Francisco Regional Water Quality Board MRP 3.0 requires 100% Stormwater Trash Capture by June 2025
• Town of Colma Received $7.04M grant from Caltrans to construct trash capture system in Colma Creek
• Colma Creek managed by One Shoreline
• Multi-agency project – Colma, Daly City, South San Francisco, San Mateo County, One Shoreline
• Treat approx. 3,377 acres in Colma Creek watershed (trash only) and approx. 793 acres in Old Colma Creek watershed (Trash and sediment) for total area treated of approx. 4,170 acres Project Treatment Area
Design Consultant Scope of Work
• Evaluate trash capture device options (both watershed) and sediment removal options (Old Colma Creek watershed)
• Perform hydraulic analysis of impacts of installing trash capture and sediment removal devices to channel capacity (hydraulic model of Colma Creek will be provided)
• Evaluate alternatives and expected capital and ongoing maintenance costs
• Recommend preferred alternative
• Perform environmental analysis and clearance (CEQA/NEPA) Design Consultant Scope of Work (continued)
• Complete 30%, 60%, 95%, and Bid Package design documents (plans, specifications, and estimates)
• Provide bid period and construction period engineering support Project Location
Project Location
Benefits to South San Francisco
• Reduce trash and sediment
transported to Orange
Memorial Park trash capture
and infiltration system
• Reduce trash and sediment
transported downstream to
San Francisco Bay
Questions?