The project is limited to construction along a 1.9-mile bikeway and multi-use trail including seasonal drainage crossing number one that will be at the western end of Phase 4a and will involve four (4), 15 linear foot 24-inch diameter high-density polyethylene (HDPE) culvert pipes, two concrete headwalls, 52 feet of pipe railing (handrail), 125 square feet of rock riprap, and 4.5 tons of asphalt on six cubic yards of base (trail). Seasonal drainage crossing number two that will be constructed toward the middle of Phase 4a will involve a 24 linear foot precast 2-foot-high x 10-foot-wide span open bottom culvert with concrete footings and headwalls, 20 linear feet of pipe railing (handrail), 140 square feet of rock riprap, and 1.9 tons of asphalt on 2.6 cubic yards of base (trail). Seasonal drainage crossing number three, four and five that will be constructed the same as number two and will have a soft surface dirt trail constructed over them that will include an armored drain swale and stream crossing. A trail with Truckee River access will be constructed by hand as a small single track soft-surface trail that will meander through the sage flat to provide a river access point for trail users. Three bridges will be constructed, including: the 206-foot Truckee Springs Pedestrian Bridge spanning over the Truckee River with the abutments located outside the floodplain; a 20-foot vehicle crossing bridge constructed with prefabricated truss and abutments over the perennial stream near South River Street (which includes dewatering and installation of an 8-inch sleeved waterline under the bridge for the Truckee Donner PUD); and another crossing over the same perennial drainage will be constructed as a 58-foot pedestrian crossing. The construction of the second pedestrian crossing will include a prefabricated truss bridge with abutments, dewatering of the area, rock lining of channel, and revegetation.