Big Walnut Trunk Extension Project – Phase 2

The project consists of the construction of approximately 12,350 linear feet of 72-inch diameter sanitary sewer (fiberglass reinforced polymer mortar) via an open face tunnel boring machine through shale rock, full face conditions. Construction also includes two (2) shafts to be constructed using secant piles; two (2) intermediate shafts and two (2) hydraulic drop structures to be constructed by drilling.

The project will include ancillary work at the shaft sites as shown on the detailed drawings, as specified in the contract specifications, and the City of Columbus Construction and Material Specifications as set forth in this Invitation For Bid (IFB).