Posted on 02/12/2017 4:26:47 PM PST by janetjanet998
Edited on 02/12/2017 9:33:58 PM PST by Admin Moderator. [history]
The Oroville Dam is the highest in the nation.
The procedure that is often followed in a big wash out of an drainage structure and flow way is to cap the area with heavy boulders that cannot be dislodged or to cap it with concrete. However, before you do that topping of the area where water is going to flow you need to replace the lower surged that has been washed away. It is generally necessary to use something such as large broken rock which bears weight due to edge to edge hard contact. (Called RipRap) Earth or gravel if used would be washed away just as the subgrade was before.
The rip-rap is delivered and often left in geotextile fabric bags to lock it into wads that won’t displace. These bags have a high tensile strength even though they are not fully closed.
Generally this whole sub-grade fill will be capped with larger rock, concrete topping or a combination of both of those items.
Part of the problem is that the runoff area was allowed to be covered with small trees digging into the earth — as they washed or their root balls washed out it pulled the grade apart. Look at new run off areas in any retention basin — earth with thick grass — not saplings and trees.
Black Locust can be used for bank erosion but this was just poor maintenance in my opinion.
Lets see if they top these bags and I turn out to be correct.
Wx forecast from wee hrs of morning; scroll to bottom:
5” to 8” expected
http://www.ar15!.com/media/mediaFiles/277447/Capture-146405.png
Oh no doubt. Was simply reflecting on the history and seeing a younger Gov Reagan. Interesting.
Info on dam; supplies more than 2/3 of the States water
http://www.freerepublic.com/focus/f-news/3524930/posts?page=1#1
It’s hard to pack and leave.
I’ve run from several hurricanes not knowing what would be left when we got back.
A little wry humor just to bring a smile in the midst of worry:
When I was preparing my home for Alicia, I took a yard swing down from a beautiful old oak tree.
After Alicia, the oak tree had fallen over but my swing was safe in the garage.
:-/
You’re in my prayers.
Holy crap. You’d think the governor would have the entire state mobilized. If this dam supplies 2/3 of the STATE, this should be ALL hands on deck.
What am I missing?
Besides the obvious snark, leftist gov, conspiracies, red county ;) This is unbelievable . Even if it’s “JUST” the spillway flooding over it’s a nightmare. The levees downriver ...crops destroyed...houses, livestock..all the unforseens..
What am I missing?
https://m.youtube.com/watch?v=jYcSt5tlTXM
Listen quick before it’s taken down.
Between :30 and :50.
“The dam is not gonna make it.”
Sorry I was unclear. I said what I’d do IF I were there. I’m in Florida and know about evac and living without power for 2 weeks etc. Been through several hurricanes;)
Love the swing story AND I’ll take the prayers too:)
Save it if you can!
I’m very hearing impaired, so can’t listen, but can send it on...
Post 887.
Listen quickly before the video is removed.
I have never seen a State level commitment to upgrade all the levees and structures in the central valley. Instead, it is treated as thought the Federal Government should just show up and start a giant waterway project because California is so important.
They feel like it should be paid for by the nation, IMHO.
For fellow conservatives, I apologize if this seems harsh toward your state but that is how it looks to an outsider.
This
This video is worth watching.
I made a post yesterday where I said I had not seen the mobilization of equipment, trucks, cranes, multiple helicopters, light plants for 24 hour operation and other things that are typical in a giant construction operation if they are going to save this thing.
This video is more like what I would expect.
Ok...the dam itself????
Is this guy reliable I wonder...or playing..messing with people..
(I often play devil’s advocate)
just got an update, don't know how true it is, but it's reliable source, that the dam's not gonna make it, that it's not working
In case the YT vid gets scrubbed, download it here (16MB):
Could be rumor, could be true, could be both - but there it is if anyone wants it.
Can any of y’all save it?
See my comment upthread, with the comment from one of the folks that viewed it.
My state (NC) has for over a decade been forcing owners of earthen dams to remove all tree growth because the roots compromise integrity of the dam, as well as update or remediate spillways, even small private dams if there are populated areas downstream. Not a cheap proposition, even spread across a homeowners association, I know it happened with my former lake house. My “share” was determined by lake frontage, $3,000.00. Some property owners are electing to just take out the dam. Funny, the Ag Extension pretty much subsidized them, back in the day. Flood control, water retention for irrigation. They’ve aged, not been properly maintained and now pose a risk of flooding if they fail.
Thanks for that. It may (or not) be important to have.
yw .. cheers
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.
