Bonnie Clare Road

Project Description

Death Valley Route 11 also known as Bonnie Clare Road begins at the intersection of California State Highway 190 just south of the turn off for Daylight Pass Road and proceeds north then east to the Park Boundary at the Nevada state line. Bonnie Clare Road is located within Inyo County in southwestern California. The road is located within Death Valley National Park and is owned and maintained by the National Park Service.

On the evening of Sunday, October 18, 2015, a torrential storm dropped nearly 3 inches of rain in just five hours on the northeast section of Death Valley National Park. Floodwaters destroyed the road through Grapevine Canyon to Scotty’s Castle. This flood came on the heels of several other October flash floods, with cumulative damage effecting both the Scotty’s Castle and Badwater areas.

This scope of work is for the final design of portions of Bonnie Clare Road from the intersection with Ubehebe Crater Road (mile post 32.5), north east toward the Park boundary (mile post 41.25). In particular the roadway requires spot repairs to sections of the roadway that were damaged by the flood and full reconstruction from mile post 36 to 41.25. The total project length is 8.75 miles.

From mile post 36 to the water intake system east of Scotty’s Castle, the alignment will match the existing alignment. A section of roadway will require full reconstruction at this location. There is potential to require water training features in the wash as the existing flow path of the wash has been filled in by degradation resulting from the flood event. The portion of road in Grapevine Canyon will be realigned from the previous alignment up and out of the wash. The intent is to move as much of the roadway out of the wash as is feasible.

Key Project Dates

Advertise: Spring-Summer 2018
Construction: Summer 2018 – Summer 2019

Project Photos

Existing damaged area

Existing damaged area.


Existing roadway and damaged roadway

Existing roadway and damaged roadway.

Map showing general vicinity of project
View a larger interactive map of the project area.

Project Details
Project # CA ERFO DEVA 11(1)
Project Name Bonnie Clare Road
Location Inyo County
FLMA Death Valley National Park
Status In Development

Contact Information

Project Manager: Brent Nagen
Phone: 720-963-3411
Email: Brent.Nagen@dot.gov

Federal Highway Administration
Central Federal Lands Highway Division
12300 West Dakota Avenue
Lakewood, CO 80228
720-963-3500