SLO 46 Corridor Improvements


California Department of Transportation

Completion Date



California Department of Transportation


Paso Robles, California

Delivery Method

Construction Manager/General Contractor (CMGC)



Contract Value

$268 million
SLO 46
Aerial of two new bridges
Aerial of new SR 46 lanes open to traffic
Aerial side view of new bridges

Atkinson is providing CMGC services for the conversion of existing two-lane SR-46 to a four-lane divided expressway, east of the town of Shandon in San Luis Obispo County stretching for 13 miles. The project also includes constructing a trumpet style interchange at SR-46/SR-41. The project is broken down into three segments: Cholame, Wye, and Antelope Grade, and includes seven bridges, 24 miles of two-lane continuously reinforced concrete pavement (CRCP), 5.5 million cubic yards of earthwork, two mini-CHP inspection stations (non-habitable), associated drainage and roadway work, third-party utility coordination, and environmental permitting support.