Planning and Preliminary Design of the Ohio Canal Interceptor CSO Tunnel Project in Akron, Ohio

摘要

The Ohio Canal Interceptor Combined Sewage Storage and Conveyance Tunnel project is one of over 20 control measures described in the City of Akron's Combined Sewer Overflow (CSO) Plan. Project requirements include a minimum storage volume, maximum typical year overflow frequencies for multiple existing and new overflow structures, gravity dewatering of the conveyance system, and ability to convey both sanitary and 10-year, 1-hour (hr) storm flows. The preliminary engineering concept included 6,136 lineal feet of 27-foot inside diameter (ID) tunnel, mined through rock, soil, and mixed-face conditions, and the world's largest baffle drop structures. The paper discusses the City's CSO Program as well as Planning Studies, Preliminary Engineering and Design, and Value Engineering for the tunnel project.