Structure Type: Digester Cover
Project Size: 30,000 sqft
Location: San Francisco, CA
Completion Date: 2015
Market Segment: Infrastructure
Owner: San Francisco Public Utilities Commission
General Contractor: Shimmick Construction Company, Inc.
Photo credits: Gary Taylor
After successfully securing a contract with the San Francisco Public Utilities Commission (SFPUC) to provide tensile membrane cladding for four digesters at the site of Oceanside Pollution Control Plant 620, construction by Enclos Tensile Structures is now completed.
San Francisco’s Ocean Digesters are an integral part of the wastewater management system responsible for solids treatment. The department constantly monitors the erosion of the tanks from exposure to rising sea levels and salty ocean air. The durable exterior PTFE membrane structures commissioned by SFPUC are protecting the digesters from further erosion and make an attractive public-facing shell.
Enclos has clad four digester tanks. Each tank has an approximate surface area of 5,000 square feet, and each fin has an additional 2,500 square feet for a total fabric surface area of a little more than 30,000 square feet. The fabric used was Sheerfill II PTFE.