Skip to main content

Creating a Tight Sewer System and Proving It – A Case Study Scio Township, Michigan

The full text article is not available for purchase.

The publisher only permits individual articles to be downloaded by subscribers.

or click here to sign up for a free trial


Scio Township desired to conduct a pilot manhole rehabilitation program to determine the effectiveness of inflow and infiltration (I/I) removal from sanitary sewer manholes. Rehabilitation was conducted in the spring of 2006 and involved rehabilitating 48 manholes in Scio's Washtenaw Intermediate School District (WISD) area. Although this district is Scio's highest area of I/I, compared to other communities, it is a drier system with relatively low peaking factors and capture rates. However, due to limitations in outlet capacity and to create capacity for planned development, it was necessary to make this tight system even tighter.

In the fall of 2006 the Township installed meters to monitor the post-rehabilitation flow from this district. The results of this metering were compared to the 2003 pre-rehabilitation metering to quantify the effectiveness of the I/I removal. In order to perform this comparison, it was necessary to have an accurate method of evaluating the flows, which were collected during different seasons and different antecedent moisture conditions. This paper will review the manhole rehabilitation program and discuss how these challenges were addressed.

Document Type: Research Article


Publication date: January 1, 2008

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 These proceedings are not peer reviewed.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Ingenta Connect is not responsible for the content or availability of external websites

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Partial Open Access Content
Partial Open access content
Subscribed Content
Subscribed content
Free Trial 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