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A Practical Guide — Planning Considerations for Mega Dollar CSO Projects

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Abstract:

Tunnels are a practical solution for storing large volumes of combined sewer overflow (CSO) with limited surface disruption during construction. Careful consideration during the evaluation and preliminary design phase of the project can help to mitigate risk and potential pitfalls during detailed design and construction. Early planning in the preliminary design phases can reap great project rewards, cost less, and lower risk during construction. This paper presents the principal elements for the development, preliminary design, and constructability considerations of a CSO storage and conveyance tunnel project. Information presented includes the evaluation of the geology and hydrogeology of the tunnel alignment corridor, construction considerations, project considerations, geotechnical exploration program, risk management strategies, and conclusions. Information is included in this paper for the Fall Creek/White River Tunnel Evaluation project, as it pertains to the types of considerations that should be completed during preliminary project phases of a storage tunnel project.

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864708790893611

Publication date: January 1, 2008

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  • 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 These proceedings are not peer reviewed.

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