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Minnesota Interceptor Sewer Breaks New Ground

Serial Information: Civil Engineering—ASCE, 1977, Vol. 47, Issue 6, Pg. 80-81


Document Type: Feature article

Abstract:

The Beltline Interceptor is a gravity interceptor sanitary sewer which has its outlet in St. Paul and its beginning in White Bear Lake. Major requirements called for a design which would eliminate existing overloaded pumping stations and the necessity of future pump stations. The route of the interceptor and the method of construction were to be the most economical compatible with environmental considerations. The interceptor should also be designed to meet present and future needs. The design solution involved major valuable elements: the use of bentonite gravel mix to provide proper pipe bedding and still be impervious; the introduction of soft soil tunneling procedures in the bidding process, proving that a viable competitive alternate to deep open cuts is available in this area. The most important element was that the project proved that by incorporating new construction procedures into a project and incorporating citizen input, the valid concerns of citizens can be satisfied and projects may proceed in harmony.

Subject Headings: Pumping stations | Project management | Soil mixing | Construction methods | Tunneling | Soil-pipe interaction | Soft soils | Minnesota | United States

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