Plans CO FTNP ROMO 407(1).pdf

This is a project plans document for a federal construction solicitation managed by the Department of Transportation Federal Highway Administration. The project, designated CO FTNP ROMO 407(1) and titled "Holzwarth Culvert," involves the replacement of a deficient six-barrel corrugated metal arch pipe culvert with a new steel girder bridge located in Rocky Mountain National Park approximately nine miles north of Grand Lake, Colorado, at an elevation of 8,900 feet along US Highway 34. The existing culvert conveys Colorado River flow and provides access to the Holzwarth Historic Site, employee housing, and National Park Service and Forest Service recreation areas. Solicitation Number 6982AF27B000004 was advertised in September 2026 with an anticipated award in December 2026.

The scope of work encompasses removal of the existing culvert, construction of a new steel girder bridge with cast-in-place concrete deck, installation of new bridge abutments and micropiles, temporary stream diversion with riprap placement, new aggregate roadway surfacing, relocation of an existing electrical line, and relocation of historic head gates to a new concrete slab. Principal work items include bridge removal (1 each), aggregate roadway surfacing (120 tons), prefabricated steel bridge installation (10 feet wide by 48 feet long, 1 lump sum), micropiles 8.68 inches diameter (180 linear feet), and temporary stream diversion (1 lump sum). Access constraints require temporary road widening on the approximately 13-foot-wide Holzwarth Culvert Access Road and construction of a temporary truck turnaround, as construction access is limited to 100 feet west of the bridge location.