CORRECTION OF A SIX MILLION GALLON PER DAY TUNNEL INFILTRATION PROBLEM UNDER A PERFORMANCE-BASED ENERGY SERVICES AGREEMENT
One component of the City of Niagara Falls, New York sewer collection system is the Falls Street Tunnel, a 90-year-old rock tunnel three miles long. A 200-foot stretch of highly fractured rock had been allowing approximately six million gallons per day (mgd) of groundwater infiltration into the tunnel, which comprised about 20 percent of the wastewater treatment plant average flow. The 2 million cost of a repair project and persistent bonding difficulties had delayed corrective efforts. The project was included with other energy conservation work being undertaken for the City under an energy savings contract. A drilling and grouting project was performed to seal the majority of voids and fissures in the surrounding rock. Reduced pumping costs and chemical usage over the next ten years will pay for the cost of the repairs. Payment to the contractor was based upon the extent of leakage reduction, which was back calculated from the projected cost savings. The amount of groundwater successfully excluded was about four mgd. A long-term performance guarantee was provided, as was done for the other energy conservation projects. Additional benefits include improved combined sewer overflow management, process flexibility, longer pump life, and maintenance flexibility.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
Document Type: Research Article
Publication date: 01 January 2001
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites