Ipswich River Siphon and Interceptor Evaluation

Sewer interceptor

The Ipswich Wastewater Department is in the process of evaluating the sewer interceptor pipe and siphon located along the Ipswich River by the historic Choate Bridge. Both the interceptor and siphon were constructed over 60 years ago and remain in original condition. The 18-inch sewer interceptor collects sewage flow from the Union Street and Market Street areas and travels from west to east under the Choate Bridge along the northern bank of the Ipswich River. The pipe, which is constructed of cast iron and supported by concrete support piers, is exposed at this location and vulnerable to damage from river flow and the elements. The 12-inch sewer siphon is located approximately 300 feet east of Choate Bridge. Sewage flow from the South Main Street and Elm Street areas travels beneath the Ipswich River through the sewer siphon, which then connects to the interceptor along the northern bank of the river. The siphon is a 130-foot long single-barrel cast iron pipe that was recently discovered to be exposed in the riverbed.

The first phase of the project will evaluate the existing sewer interceptor and siphon. Once the evaluation is complete, the information gathered will be used to develop the second phase of the project, which will likely involve future construction activities.

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