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.
One of the weather guys on Fox 2 in the bay area has a degree in geology as well as a doctorate in meterology.
For years he has warned areas in common flooding area to get rid of the upstream debris/often dead trees in the river plain and dead brush.
Then, they need to dredge down stream to the bay to prevent flooding down stream an a regular if not yearly basis.
Exactly your #1 and #2.
1a) Clear the river of a lot of the debris. Couple of big clam shell passing it to track excavators just to get it out of the river bed, simultaneous with —
1b) Cut a new pathway for water below the break that would not continue to add as much debris to the river channel.
Not surprising is how some of the local environazis fight his suggestions and yours.
* quickly dredge as much as possible and dump it on land for later removal
* use sheet piling to divert the dam tailwater around the foot of the spillway
I would love to add sheet piling to the mix. Normal strength sheet pile won’t drive into areas of solid bed rock and heavy sheet piling that you could almost cut the rock with are going to penetrate rock layers that are solid enough without the cut that you want to rely upon them later, IMHO.
You idea has another merit however. In the river bed, upstream of the dispersion flow area on the original spillway path, a sheet pile wall in the river bed would keep debris from heading upstream once repairs are made.
| |
| |
| spillway |
| |
| |
--------------- ------------------------------
/
river /
/
/
/
=========== piling ===========
river
-------------------------------------------------------
The condition of the riverbed is unknown. It could be a problem. The bank opposite the spillway could be cutout if needed and protected with piling.
Wow.
Not going to be all that cold in the FR basin.
http://forecast.weather.gov/MapClick.php?lat=39.7663&lon=-120.6185#.WLXXCf4zU5s
That is bigger than a “wow”.
It is at least a “holy crap”.
The brown rock turned into silt and mud. The harder gray rock turned into a huge gravel bar. Look at all the gray rock in the cut. It’s harder than the brown rock but it’s not a hard rock.
Thanks for the links
When the night low temps are over freezing, that increases the daytime thawing when those temps are in the 40-50’s.
...and then add pulverized concrete slabs, twisted re-bar, tree trunks, etc. to the mix...
Simply amazing.
Those guys have a heck of a task ahead of them.
They better get a move on.
What is that asphalt looking pile made of? Is that pile of whatever going to be removed by some means? Gutwrenching mess of hi tech engineering left in the control of the White Rabbit junk scientists!
Mostly pulverized rock theoretically to be removed by the cranes and drag-lines on the barges.
Thanks. Looks like 3 barges, cranes and 1 truck in the picture above. Perhaps they’ve decided there isn’t time enough to remove all that heavy debris? Sort of disheartening really.
Probably not practical...
Might not be practical, but it would be more fun.
Nothing more boring than watching a drag-line work.
Supposedly there is an upstream barge crew,
and a downstream barge crew,
and a ground assault crew from the far bank of the river.
We shall see...
They will keep the main spillway shut-off as long
as the weather cooperates.
Lake level is now at 841 feet, and creeping up very slowly.
Apparently, water @ 100,000cfs smashed them to smithereens, returning them to their aggregate state, cement notwithstanding.
Holey Moley :-\
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