Project Location: The project site is located in Eastern Nevada County approximately 6 miles east of the Town of Truckee and encompasses three adjacent sites: the two bridges located on Hirschdale Road, 17C-045 over the Truckee River and 17C-046 over the UPRR; and improvements associated with an alternative access route along West Hinton Road (Boca Quarry Road), Hinton Road, and construction of a new “Quarry Bypass Road.”
Project Description: The Nevada County Department of Public Works (DPW) is proposing to remove two structurally deficient/functionally obsolete bridges near the community of Hirschdale and construction of an alternative access route to maintain access to private properties east of the existing bridges. The Truckee River bridge (No. 17C-0045) was constructed in 1926 and is 248 feet long, and 25 feet, 6 inches wide. The Hinton Overhead Bridge (No. 17C-0046), which crosses the Union Pacific Railroad (UPRR), was constructed in 1926 and is 171 feet long and 25 feet, 6 inches wide. Initially, the two bridges were planned for replacement. After evaluation of project alternatives, which included the preparation of preliminary design plans, environmental studies and cost benefit analysis, and in consultation with Caltrans, the County determined that the preferred alternative would be to remove the bridges and construct an alternative route at significant cost savings.
Truckee River Bridge: Hirschdale Road would be closed for public use from the western approach of the Truckee River Bridge to the eastern approach of the Hinton Overhead Bridge during construction. Demolition of the Truckee River Bridge would begin with removal of the deck followed by removal of the piers and abutments. To prevent debris from falling into the Truckee River during demolition, a tarp or equivalent would be used during saw-cutting or chipping operations and while the superstructure is being prepared for removal in sections, to catch dust, slurry or chunks of concrete before debris enters the Truckee River. The prepared sections of superstructure would be lifted off of the piers and abutments by crane and placed on flatbed trucks for removal from the project area. When the superstructure sections are lifted out by crane, the tarp (or equivalent) would also be lifted away with those sections.
Hinton Overhead Bridge: Demolition would include the removal of the deck followed by removal of the piers and abutments. The removed sections of superstructure would be lifted off of the piers and abutments by crane and placed on flatbed trucks for removal from the project area. A temporary protective structure or other preventive measures that would be acceptable to the UPRR would be used to prevent debris from falling onto the railroad tracks during superstructure demolition.
Alternative Access Route: The alternative route would include minor improvements to West Hinton Road (Boca Quarry Road), Hinton Road and Hirschdale road, and construction of a “Quarry Bypass Road.” West Hinton Road (Boca Quarry Road) would retain its existing gravel surface and drainage ditches, however, approximately 0.6 mile from the intersection with Stampede Meadows Road, along the northerly side of West Hinton Road, an earth berm up to 450 feet long, approximately 10 to 12 feet high, and 30 feet wide would be constructed using excess grading material from the construction of the proposed “Quarry Bypass Road.” Approximately 0.25 mile north of the quarry, the new Quarry Bypass Road would diverge from the existing West Hinton Road (Boca Quarry Road) alignment and continue south, bordering the southwesterly limits of Boca Quarry for approximately 0.7 miles, until it nears I-80, at which time it would turn to the east and terminate at existing Old Hinton Road just north of I-80. The Quarry Bypass road would involve new construction that would include grading, paving, roadside ditches and culverts. Grading would involve cuts and fills up to 40 feet in height. Upon project completion Hirschdale Road would be closed by Nevada County from the western approach of the Truckee River Bridge to the eastern approach of Hinton Overhead Bridge; thus restricting landowner access to parcels (or portions of) via a public roadway owned and maintained by Nevada County.
Funding: Federal Highway Bridge Program (HBP), Measure F State Exchange, and Prop 1B.
Total Budget: $5,818,419
This Notice of Availability serves as public notice that the Nevada County Department of Public Works has prepared a Mitigated Negative Declaration for the project identified above. As mandated by Public Resources Code §21091, the minimum public review period for this document is 30 days. The public review period for the proposed project is from May 16, 2014 to June 16, 2014. Comments must be received by 5 p.m. on the last day of the comment period, June 16, 2014. Send comments to David A. Garcia, Jr., Transportation Planner, at David.Garcia@co.nevada.ca.us, or mail comments to:
David A. Garcia, Jr., Transportation Planner
Nevada County Department of Public Works
950 Maidu Avenue
Nevada City, CA 95959
Comments received on this Initial Study will be considered by the County Board of Supervisors prior to approval of the project. The Board of Supervisors will hold a public hearing before it considers certification of the Initial Study and approval of the proposed project.
In addition to online, the Proposed Mitigated Negative Declaration can be viewed at the following locations:
Nevada County Department of Public Works Town of Truckee Community Development Department
950 Maidu Avenue Truckee Town Hall
Nevada City, CA 95959 10183 Truckee Airport Road
Hours: 8 a.m. - 5 p.m. Mon. - Fri. Truckee, CA 96161
Hours: 8 a.m. - 4 p.m. Tue. - Fri.