Skip to main content


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


The Detroit Water and Sewerage Department (DWSD) is currently constructing thirteen (13) insystem storage devices in large trunk sewers to minimize combined sewer overflow (CSO). The total amount of ISS to be provided is 54 million gallons (MG) for the 13 devices.

The ISS devices will be inflatable dams which will be operated to store wet weather sewage flows and reduce CSO, especially for smaller storms that would not otherwise utilize the flowing full capacity of the trunk sewers.

An important design criterion for the project was to minimize the number of level sensors required, since level sensors need frequent maintenance to be reliable.

Design parameters and control schemes were developed and tested with the Transient Analysis Program (TAP). The analyses showed that DWSD's design criteria can be met by carefully selecting the ISS dam design parameters and control schemes. Dam inflation/deflation rates in the range of 0.5 to 1 foot per minute were determined to be acceptable.

The analyses determined that nine (9) ISS dams will require an upstream and a downstream level sensor. Four (4) ISS dams will require only an upstream level sensor since these dams are within the backwater zone of another ISS dam and can utilize the lower ISS dam's upstream level sensor for control.

Document Type: Research Article


Publication date: January 1, 2002

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 These proceedings are not peer reviewed.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