Type 1 Drainage Error - Double Fetch Compound Erosion

This video walks through a compounding erosion scenario, also known as a "double fetch", where water that should be shed from a roadway is instead dumped back onto the road at a later point. Due to an undersized and under-maintained culvert with inadequate grade to keep it clear, and a second culvert with improper discharge of high-energy water close to the road edge, the erosive force is compounded until it is capable of ripping massive gullies in the fragile sandstone soil of the Santa Cruz Mountains.
Situations like this are not uncommon where road construction, maintenance and design are often piecemeal. Without a complete understanding of the water picture over the entire road course and multiple, not necessarily similarly incentivized property owners, it is easy to see how compound erosion situations develop as each property owner does just enough to make it "not my problem"...until it becomes everyone's problem.
Illustrated as well are simple, relatively inexpensive fixes that can and will save major maintenance expenses down the line.
For more information on ecologically sound low-standard road design and drainage we highly recommend Bill Zeedyk's booklet A Good Road Lies Easy On The Land. Download link available below.
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Do you normally grab poison oak bushes like that? Ive learned a lot from just a couple if your video's, thank you!