Re: Cull Canyon Deep Mud

On Fri, 10 Jan 2025 21:43:59 GMT, cyclintom <cyclintom@yahoo.com>
wrote:

On Tue Sep 10 10:56:59 2024 Jeff Liebermann  wrote:

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.

>
These are the same engineers who said that they would have Redwood Road repaired in 2 months!

They changed their minds, ran out of money, or had something more
important to fix on Jan 18, 2024:
<https://www.acpwa.org/about-us/roadclosure.page>
"This section remains closed indefinitely due to large sinkhole"

Original closure notice Jan 4, 2023:
<https://www.acpwa.org/acpwa-assets/docs/Press-Release/Redwood-Road-Closure-January-4-2023-New.pdf>
"Redwood Road has three areas of failure. The largest failure area is
currently being repaired and is scheduled to be complete by the end of
November. The other two failures, are anticipated for completion by
January 2025, weather dependent."

I'm fairly familiar with the local road closure announcements.  I
don't know about Alameda county, but in about 50 years in Santa Cruz
county, I've never seen an announcement that it will be fixed "in 2
weeks".  That kind of announcement is highly prone to confusion
because it doesn't specify when the 2 weeks will start.  In this case,
Redwood Dr will hopefully be completed "by Jan 2025, weather
dependent).  If it's by the end of January 2025, then you have about 2
more weeks to wait.

The Dam was BUILT with a runoff that diverted the flow through a concrete bypass if the reservoir got too large. That reservoir was there for a reason. It supplied fire hydrants for a dozen housing projects in the area. When the mud filled the reservoir Cull Creek diverted over to run directly through that bypass and it appears to be a permanently cut channel now.
>
Since you NEVER rode bikes for anbything other than cheap transportation (not that there's anything wrong with that) why are you speaking about riding as if you are an ex-pro?

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