Buchanan Road

Project Description

The Federal Highway Administration, Central Federal Lands Highway Division (FHWA-CFLHD), in cooperation with Forest Service–Stanislaus National Forest (STF) and Tuolumne County, improved a portion of County Road 460507, formerly known as Forest Highway 191, and, also known as Buchanan Road. The improvements included (1) rehabilitation of 0.6 mile of Buchanan Road beginning in Tuolumne at Carter Street; (2) reconstruction of 1.9 miles of Buchanan Road from Tuolumne to the Buchanan Mine Road (BMR) Bridge; and (3) removal and replacement of the BMR Bridge to the south of the existing bridge across the North Fork Tuolumne River.


The purpose of the proposed action is to improve the operation and safety of the roadway and reduce maintenance costs.


The need to improve travel characteristics and operational safety on Buchanan Road is driven by the presence of the following roadway conditions and design deficiencies that affect its operational condition:

  • Insufficient roadway widths
  • Structurally deficient pavement conditions
  • Sub-grade settlement and fill slope movement
  • Poor surface drainage and non-functioning ditches
  • Substandard sight distances and road side hazards
  • Substandard road geometrics (steep grades and sharp curves)
  • Cut-slope instability in steep cut areas
  • Lack of guardrail in the steep descending portions of the canyon
  • Lack of clear zone in portions of the canyon
  • Functionally obsolete BMR Bridge

Key Project Dates

Advertise: Summer 2017
Construction: Fall 2017 – Fall 2018

Project Photos

Construction - Setting girders

Construction - Setting girders.



Environmental Documents

View a larger interactive map of the project area.

Project Details
Project # CA FLAP 460507(1)
Project Name Buchanan Road
Location Tuolumne County
FLMA Stanislaus National Forest
Status Completed

Contact Information

Project Manager: Wendy Longley
Phone: 720-963-3394
Email: Wendy.Longley@dot.gov

Federal Highway Administration
Central Federal Lands Highway Division
12300 West Dakota Avenue
Lakewood, CO 80228