06/15/2026
Surveying and the Road Ahead⌠and Before. (Part 1)
Through the desert, through the mountains, through the mud, up grades of 30%, and a 170 mile treacherous journey. A journey so unpredictable that San Francisco merchants were preferred over Los Angeles Merchants, even as far as Bakersfield. Travel times over the mountains were unreliable and the stagecoach road was not fit for the Automobile, nor the rapidly changing times.
Preliminary surveys were ordered on January 25th, 1912. Aptly named, W. Lewis Clark, Highway Department Engineer Division VII, set out to map out the LA County section of this revolutionary new road. Clark specialized in the âsublime and ridiculousâ and was tasked with âsuch a choice array of road-building problems.â [1920 California Highways]
He selected 5 potential routes for this stretch of Inland Route. One by one eliminated due to drainage problems. With all existing options disqualified, âMr. Clark girtled his loins, cinched up some pack mules and went over the top via what is today the Ridge Routeâ, bush whacking through the mountains to map out a brand new path.
JB Woodson took the Grapevine portion of the road. He went with the safe route - or so one would think. (Weâll talk more about that later.) His survey stuck closely to the old stagecoach road, looking for solid hillside benches and planned for concrete culverts to cross Grapevine Creek.
Concrete blocks with the letter âCâ were placed at every angle and curve point, along with intervals on straight lines to mark the right of way of this new highway. 444 of them, just barely peeking out of the ground, marked the path of the road that would change the course of history.
Now, why go through such drastic measures when it comes to surveying?
More to come in part 2!
PHOTO: Old Ridge Route, Castaic CA. 8N04 Ridge Route Gallery Collection.