Site work for a bridge / tunnel in Grand Lake, Colorado. Conceptual plans call for site work for a bridge / tunnel.

The project consists of removing the existing six-barrel corrugated metal arch pipe culvert and constructing a new steel girder bridge with a cast-in-place concrete deck. Work includes building new bridge abutments supported by micropiles, performing temporary stream diversion, and placing riprap. The project also involves new aggregate roadway surfacing, relocation of an existing electrical line, and relocation of existing historic head gates into a new concrete slab. Access to the site is via a narrow road with tight turns, requiring temporary widening to prevent trucks from impacting sensitive environmental resources. A temporary truck turnaround area will be constructed, as construction access is restricted beyond a specified point near the bridge. Principal work elements include bridge removal, roadway aggregate placement, installation of a prefabricated modular steel vehicular bridge, micropile installation, and temporary stream diversion. ESTIMATED COST RANGE: Total estimated cost between $700,000 and $2,000,000. The Method of Contractor Selection has not been determined at this Time. *The value for this project is based on a financial range. The value is listed as the highest possible cost from the range provided by a stakeholder or official project document.