Oroville Dam Week 2: Snow Melt Threat

27 02 2017

Breitbart News Northern California Snowmelt Crisis as Temps Rise into 70s

” . . . as temperatures rise to 65 degrees in mid-mountain elevations at the 6–8,000 foot levels that received 3 feet of snow in the last set of storms, 13-degree-above-average temperatures are about to trigger an early spring snowmelt,”

NOTE: Upper Feather River data and dam data links are on last Monday’ post.

orovillemaps_goto

KRCR –  Feb. 26 – Shasta Lake Area gets a SNOW WARNING

...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 2 PM THIS AFTERNOON UNTIL 10 PM PST THIS EVENING... * TIMING...
Snow will begin this afternoon and taper off to lighter snow late this evening. * MAIN IMPACT...Weekend travelers could experience travel delays, chain controls, and slick roadways. * SNOW AMOUNTS...Between 2 and 4 inches of snow expected for mountain passes, including Interstate 5 north of Lake Shasta.

Sacramento Bee

  • Can Oroville Dam’s badly damaged spillway hold up through the rainy season?

    ” . . . with at least five more weeks to go in California’s rainy season, and billions of gallons of water waiting to rush into the reservoir when the snowpack blanketing the Sierra Nevada melts this spring, the question on the minds of many living in the Sacramento Valley is this:
    Just how long can the badly damaged spillway hold up?

  • Oroville Dam’s banged-up spillway to shut down Monday

    “. . . DWR said it will begin dialing back the flows at 6:45 a.m. Monday, bringing the releases to a halt by sometime in the afternoon. DWR said it plans to keep the outflows at zero “for several days”.
    Dam operators have been moving in equipment to a water channel beneath the spillway in order to remove the pile of mud, concrete and other debris that’s accumulated since the crater developed Feb. 7. The pile is backing water up into the dam’s hydro plant, making it impossible to restart.”

  • This winter has bashed the heck out of California roads

THURS.

LA Times Snowpack levels surge in the Sierra Nevada, helping to power California out of drought  . . . “Helping”??

San Fransisco ChroniclePhenomenal’ California snowpack nears record depths

Near-record Sierra snowpack — 185 percent of average

FRI.

USA Today – Out West, the snow is so deep that scientists don’t have any tools to measure it

” . . . A greater percentage of precipitation coming in the form of rain instead of snow and irregular snow-melt cycles makes it more difficult for communities to capture water for public use.
“Instead of making its way into our faucets, the snow we have now could be washed away into the ocean . . . .””

snowpack_chart

LINK –  http://youtu.be/sJyU_ctqi08

redLINE

Good film of the damage from Oroville Dam outflow –

LINK-  http//youtu.be/Lq0A5kj9iBw

TruthOut More Near-Disasters Like Oroville Are Very Likely in the Future, Say Experts

” . . . .There are a number of dams with similar spillway problems [as Oroville], or where the inflow can exceed what you can release as outflow out of the dam and that puts them in a dangerous situation. There’s some water purveyors that are looking at new water projects that would make it even worse, like the Merced Irrigation District, which wants to raise the emergency spillway at Exchequer Dam on the Merced River so that it could store more water, but that would further reduce their ability to manage the reservoir during a flood event like this.”

This North Coast Journal blog takes issue with Breitbart News story earlier this month about the Klamath River. . . .
” . . . The Klamath Project — featuring seven dams, a series of canals and pumping stations — was designed to divert water from the river into an irrigation system that allowed for the transformation of hundreds of thousands of acres of rangeland into farmland. The Klamath River Hydroelectric Project, meanwhile, included eight dams — including the four slated for removal — and, as its name attests, was aimed to providing cheap hydroelectric power to farmers and ranchers in the area. . . “ – (Has a good map.)

We just put this video in the comments – showing the dam damage now that they turned the tap off…

22717_damdamage

LINK –  http://youtu.be/9lmYJAg3Evs

morepostsdam

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24 responses

27 02 2017
flyingcuttlefish

San Jose floods: City’s failure to raise alarm contrasts response to crisis at Oroville Dam
http://www.mercurynews.com/2017/02/26/san-jose-floods-citys-failure-to-raise-alarm-contrasts-response-to-crisis-at-oroville-dam/

27 02 2017
flyingcuttlefish

28 02 2017
flyingcuttlefish

28 02 2017
flyingcuttlefish

28 02 2017
flyingcuttlefish

Weather [sent in] –
For Oroville We’re showing Clear with the following exceptions:

-Mar 4
62° /44°
A couple of afternoon showers

-Mar 4
62° /44°
A couple of afternoon showers

-Mar 12
67° /42°F
Periods of rain

-Mar 13
62° /44°
Rain

Then Thunderstorms starting on Mar 16-20, with Some Rain of the 21st! Thunderstorms are not the norm for this part of the US.

1 03 2017
flyingcuttlefish

1 03 2017
flyingcuttlefish

1 03 2017
flyingcuttlefish

FEB 28 Resevoir levels chart – [PDF]
http://cdec.water.ca.gov/cgi-progs/products/rescond.pdf

2 03 2017
flyingcuttlefish

Infographic: Serious snowpack –
http://infogr.am/serious_snowpack

2 03 2017
flyingcuttlefish

2 03 2017
flyingcuttlefish

2 03 2017
flyingcuttlefish

2 03 2017
Keith C. Mandeville

Very informative video from a person on the ground walking the entire area. He talks to some key officials and gives some informed insight into the whole operation. Look at all the chemtrailing at about 24 minutes into the video. Notice all of the rock debris they’re placing by the emergency spillway. That debris is so loosely packed that any water flowing down the emergency spillway will have no problem pushing that debris right down the Feather River.

2 03 2017
flyingcuttlefish

I think the loose debris fell down there from above or was exposed.
Yes, I like that guy … he’s the one who gave the alert about the spillway gates operating on backup power.
Plus I had no idea they strung those big lines by helicopter.

2 03 2017
Keith C. Mandeville

Construction work on the spillway and diversion canal.
Watch “Lake Oroville Spillway March 1, 2017” on YouTube

——————–
I can’t zoom the video or any kind of size reference can be made. However, the spillway concrete does look pretty thin.
Watch “OROVILLE DAM UPDATE – 03-02-2017 – Lake Oroville Dam Spillway Damage Revealed” on YouTube

2 03 2017
flyingcuttlefish

I zoom in by making the vid full screen,
mouse over the vid, right click it and zoom option shows.
Most of these vids have poor resolution as default and, by hand, you have to click the little cog icon on the lower right side and make it hi-def.

3 03 2017
flyingcuttlefish

some nice hi-def images

5 03 2017
flyingcuttlefish

flyover footage –

3 03 2017
flyingcuttlefish

3 03 2017
flyingcuttlefish

UH-OH –

3 03 2017
Oroville Dam: All Hope Rests on the Power Plant | flying cuttlefish picayune

[…] NEW film footage posted in the comments on the week 2 post […]

3 03 2017
Keith C. Mandeville

On a similar note, Dutchsinse is concerned about the lack on M4.0 or greater earthquakes on the Pacific coast and inland. Looks like pressure could be building this area.

Oroville Dam faces another risk: Earthquakes from rapid rise in water levels.
Excerpt: …winter of 1974-75 unusual was that water levels had to be reduced to their lowest level since the reservoir was first filled to repair intakes to the hydroelectric power plant.
Months later, there was an unprecedented refilling of the lake that ended in June 1975.

Then the earthquakes started.

Instead of fewer than five earthquakes a month in a zone within 25 miles from the dam, as had been the case for the previous year, June and July suddenly saw more than 10 earthquakes each month.

Then the largest earthquake in the sequence hit: a magnitude 5.7…

That August became a banner month for earthquakes around Oroville Dam — more than 3,000 temblors were recorded, before fading to more than 700 a month later and over 100 by October.

http://www.latimes.com/local/lanow/la-me-ln-oroville-earthquake-20170302-story.html

3 03 2017
flyingcuttlefish

yeah – see the YS blog (comment on recent post)
http://ysamok.wordpress.com/

4 03 2017
flyingcuttlefish

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