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Ellsworth Air Force Base (EAFB) is a United States Air Force Air Combat Command (ACC) installation located 12 miles east of Rapid City, South Dakota. The 28th Bombardment Wing (B-1B Bombers) is the host unit of Ellsworth AFB.

Between 1994 and 1999, four separate Infiltration & Inflow (I/I) investigations were conducted at EAFB by the firm, Ecology & Environment, Inc. (E&E). The investigations revealed the following information on the condition of the sewer system:

26%, of the sanitary and industrial sewer lines were in immediate need of rehabilitation to repair structural defects

25%, of the sewer lines were identified as having moderate defects that need repair in the near future to prevent excessive I/I

33%, of the manholes needed to be repaired or replaced

E&E presented the following four alternatives for rehabilitation of sewer pipes:

Sewer Pipe Open Excavation and Replacement

Cured-In-Place Pipe Liner

Chemical Grouting of Joints

Pipe Bursting Replacement

In 1999 the US Army Corps of Engineers commissioned Earth Tech to design and construct sanitary sewer rehabilitation projects to correct the deficiencies identified by E&E. Between 1999 and 2004, Earth Tech conducted five separate sewer rehabilitation projects at Ellsworth AFB. A combination of open excavation and pipe bursting replacement techniques was utilized on each project.

This paper will describe how pipe bursting was utilized on each project and highlight the reasons for selecting the pipe bursting method of sewer rehabilitation. The paper will also show how the cost of pipe bursting compared favorably with open excavation while minimizing disruptions to military operations at the Base. Lastly, this paper will present the construction-related advantages of the pipe bursting method as well as the pitfalls encountered during construction.

Document Type: Research Article


Publication date: 2004-01-01

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