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From: Jeff Liebermann <jeffl@cruzio.com>
Newsgroups: rec.bicycles.tech
Subject: Cull Canyon Deep Mud
Date: Tue, 10 Sep 2024 10:56:59 -0700
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This is for Tom.

(Sept 2013)
"Cull Canyon Reservoir / Dam"
<https://www.youtube.com/watch?v=OvZDs5JUr1M>

Compliments of the Castro Valley Sanitary District.
<https://www.facebook.com/CVSan>

Looks like the reservoir has been a problem for at least 11 years. The
video explains why fixing the deep mud problem is difficult.  More
recent photos show a functional lake.  This page explains the
sedimentation problem:
<https://en.wikipedia.org/wiki/Cull_Canyon_Regional_Recreation_Area#Reservoir_sedimentation_issue>
I really like this proposed (political) solution:
"Alameda County engineers have proposed to notch the reservoir's weir.
This would let water flow downstream, leaving the accumulated sediment
behind. Ackerman said that cost would be less than $1 million, and
that the seismic threat would be eliminated because the (California)
Division of Safety of Dams would no longer consider it a dam if it
didn't hold back water."

Hey Tom.  On your next ride, could you check if the dam has a notch?

In any case, there's no indication that the deep mud will impact Tom's
bicycle rides or the use of the various trails:
<https://www.ebparks.org/sites/default/files/cull_canyon_map.pdf>
Perhaps if you stop spinning your wheels there might be less silt.


-- 
Jeff Liebermann                 jeffl@cruzio.com
PO Box 272      http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann      AE6KS    831-336-2558