Skip to main content


Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

A project was recently undertaken to attempt to relieve chronic surcharging in a 65-year-old interceptor paralleling the scenic Niagara Gorge. The interceptor, a rough-cut, rock tunnel designed and constructed during the depression, conveys combined wastewater to a pumping station, which in turn transports it to the Niagara Falls Water Board's wastewater treatment plant. Chronic surcharging and wet weather geysers prompted an investigation into the causes, which used various methods including remote observations, entry by divers, chemical tracer testing, ground penetrating radar, imaging sonar and sub-bottom profiling sonar. The effort determined that a several thousand-foot section had become occluded with a long-term accumulation of debris.

A cleaning project was undertaken where a choice of several methods would be permitted; the successful bidder chose to bypass pump around the section, allowing manned entry and manual cleaning with equipment. Once cleaning in the mainline tunnel, however, it was discovered that the tunnel roof and walls had severely deteriorated over time. This created a larger cavity within which a much greater quantity of debris existed. The approach and project budget could not accomplish a complete tunnel cleaning as anticipated. The cleaning effort was suspended with about half of the total amount of debris removed.

The construction bypass pumping system was modified and expanded in a successor project, aimed at supplementing tunnel hydraulic capacity around the most critical section. This temporary measure would permit the owner to reevaluate the feasibility of other candidate corrective measures, now knowing the actual condition of the tunnel. Work to complete the project is expected within the next few years.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Document Type: Research Article

Publication date: 2005-01-01

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 These proceedings are not peer reviewed.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
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more