Replace Culvert on Davis Stream

This contract requires the contractor to provide all tools, labor, equipment, supervision, transportation and materials necessary to remove an existing culvert system, consisting of three culverts, and replace them with an open channel structure. Work is to be done in accordance with all existing Federal, State and local codes. The proposed structure is a box-bridge set on concrete block abutments with a clear span between abutments of 17.5', a rise above the stream bed of almost 4', and a length (deck width) of 21'. The elevation of the stream bed at the inlet will be set at ˜722.3', and the stream bed at the outlet will be set at ˜722.0' feet to provide the appropriate slope. The bottom of the proposed abutments are to be set at approximately 720' in elevation, avoiding dominant scour forces, and large rock will be used to armor the abutments to protect them from scour during extremely large flow events. Banks should be built inside the abutments on this armor rock for terrestrial animal passage, and to concentrate low flows. The road elevation will be raised ˜1' at the crossing to ˜727.75' to provide sufficient capacity, so fill (˜75 yds) will be needed to taper this fill to the existing road surface on each side.

Division 02 -	Existing Conditions, Subsurface Investigation.
Division 03 -	Concrete, Concrete Reinforcing, Cast-in-Place Concrete.
Division 05 -	Metals, Structural Metal Framing, Metal Decking.
Division 23 -	Heating, Ventilating, and Air Conditioning (HVAC), Facility Fuel Piping, Facility Fuel-Storage Tanks.
Division 31 -	Earthwork, Clearing and Grubbing, Grading.
Division 32 -	Exterior Improvements, Fences and Gates.
Division 33 -	Utilities, Storm Drainage Utilities.