Los Angeles Section ASCE
Riverside/San Bernardino Branch
Historic Civil Engineering Landmarks

Ridge Route
Landmark No. 8

Los Angeles Section
Master Landmark List
Wikipedia Assembly Bill
98-2001
Historic US 99 Guide Ridge Route
Preservation Organization
2008-2009-Award
 
LA Times Map
Source: http://www.calgold.com/CalGold_Club/map_RidgeRouteMap.closed.pdf