ida-kooten8450-1_plans_RFP.pdf

This document is a Plans for Proposed Project prepared by the U.S. Department of Transportation Federal Highway Administration for the Yellowstone Trail Road, Segment 1 improvement project located in Coeur d'Alene National Forest, Kootenai County, Idaho. The project involves road rehabilitation, bridge construction, and rock stabilization work on a 0.20-mile segment of roadway.

The project includes comprehensive construction specifications and detailed engineering plans covering roadway excavation (222 cubic yards), asphalt concrete pavement Type 1 (136 tons), structural concrete (31 cubic yards), precast prestressed concrete slabs with 48-inch voiding at 21-inch depth (330 linear feet), reinforcing steel (2,400 pounds), bridge railing in concrete (55 linear feet), rock bolts at 25 kips capacity (235 linear feet), rock dowels (195 linear feet), and reinforced shotcrete (150-173 square yards). Soil erosion and sediment control measures include fiber roll (120 linear feet) and check dams (3 each). Temporary traffic control work encompasses single-lane I-90 closure management with detour signage and construction-phase traffic control supervision (120 days). Permanent traffic control includes guardrail systems with Type 31 beam guardrail in both 6-foot and 9-foot post configurations (420-500 linear feet), terminal systems, structure transition railing (23 linear feet), and pavement markings (1,120-1,235 linear feet each for white and yellow). Utility work requires 6-inch PVC conduit (480-500 linear feet), utility boxes/pullboxes (2 each), and utility trenching (240-270 linear feet). Slope stabilization incorporates temporary rockfall protection and reinforced shotcrete details. The project is designed for a maximum design speed of 25 mph with a 6% maximum grade, utilizing Standard Specifications for Construction of Roads and Bridges on Federal Highway Projects, FP-24.