Kirker Pass Truck Climbing Lane, Contra Costa County, CA

The project widened Kirker Pass Road to accommodate a truck climbing lane (approximately 2 miles long) from an access driveway at Sleep Train Pavilion parking lot (southwest end) to the intersection of Hess Road and Kirker Pass Road (northeast end.) The existing Kirker Pass Road was constructed on cuts into the native soil, bedrock, and on engineered fills; and serves as an important interregional east-west link between Concord and Pittsburg/Antioch. The project included five retaining walls, mostly in fill. Two walls are in major cuts with complex geologic conditions requiring special wall designs. All work was performed in accordance with Contra Costa County requirements, and included coordination with the Contra Costa Water District (water tank site), Concord, and obtaining county permits. Studies included downhole tele-view for bedrock/slide mapping, geophysical testing; and installation of inclinometers for monitoring slopes during construction. The project was awarded 2021 Project of the Year by the American Public Works Association,  Northern CA Chapter.

The project had similar elements (on a smaller scale) to the Jameson Canyon Road Project, and widened Kirker Pass Road to accommodate a truck climbing lane (approximately 2 miles long) from an access driveway at Sleep Train Pavilion parking lot (southwest end) to the intersection of Hess Road and Kirker Pass Road (northeast end.) The existing Kirker Pass Road was constructed on cuts into the native soil, bedrock, and on engineered fills; and serves as an important interregional east-west link between Concord and Pittsburg/Antioch. The project included five retaining walls, mostly in fill. Two walls are in major cuts with complex geologic conditions requiring special wall designs. All work was performed in accordance with Contra Costa County requirements, and included coordination with the Contra Costa Water District (water tank site), Concord, and obtaining county permits. Studies included downhole tele-view for bedrock/slide mapping, geophysical testing; and installation of inclinometers for monitoring slopes during construction. The project was awarded 2021 Project of the Year by the American Public Works Association, Northern CA Chapter.