NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#151

Post by RTH10260 » Fri Mar 16, 2018 9:53 pm




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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#152

Post by vic » Wed Apr 04, 2018 1:03 pm

http://www.chicoer.com/general-news/201 ... hin-a-week
Oroville >> The partially repaired main spillway at Oroville Dam may be put into use this week or next, according to the state Department of Water Resources.

The oncoming storm is expected to raise the water level of Lake Oroville to 830 feet above sea level, which requires stepped-up releases to 14,500 cubic feet per second under DWR’s flood control plan for April.

That is the maximum flow possible through the Hyatt Powerhouse at the base of the dam with the five turbines that are currently functioning.
:snippity:
DWR had planned to shut down one of the penstocks to the Hyatt Powerhouse this month for routine maintenance. That plan has been dropped due to the weather situation, according to Erin Mellon, assistant director for public affairs for the Department of Water Resources.

The lake is up 68 feet since the first of March.
:snippity:



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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#153

Post by RTH10260 » Wed Apr 04, 2018 4:46 pm

vic wrote:
Wed Apr 04, 2018 1:03 pm
http://www.chicoer.com/general-news/201 ... hin-a-week
Oroville >> The partially repaired main spillway at Oroville Dam may be put into use this week or next, according to the state Department of Water Resources.

:snippity:

The lake is up 68 feet since the first of March.
:snippity:
Ooops - quite a surprizing jump in water level! Just a few weeks back they hoped to get done without using the spillway cause the snowfall in the mountains was little. The construction engineers wont be happy, they already were building an access road below the spillway to fix those huge blocks that brake the water power. I guess the water will wash that part of road away.



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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#154

Post by much ado » Wed Apr 04, 2018 7:08 pm

RTH10260 wrote:
Wed Apr 04, 2018 4:46 pm
Ooops - quite a surprizing jump in water level! Just a few weeks back they hoped to get done without using the spillway cause the snowfall in the mountains was little. The construction engineers wont be happy, they already were building an access road below the spillway to fix those huge blocks that brake the water power. I guess the water will wash that part of road away.
Just in case anyone is interested here are some interesting pages from the California Department of Water Resources...

This one shows the water level of the main California reservoirs. For each, it shows a bar of today's water level as a portion of total capacity with a red line that indicates the historical average water level for this time of the year. Almost all are at or above 100% of the historical level for this date.

http://cdec.water.ca.gov/resapp/RescondMain

Clicking on the bar for a reservoir will bring up a graph of the water level in the reservoir for the current water year, which begins on October 1. Here is the graph for the Oroville reservoir, which shows the recent jump. It is currently at 78% of the historical average level for this date. You can select the years you want to display. Clicking on '2016-2017' will show last year's level, which exceeded capacity.

http://cdec.water.ca.gov/resapp/ResDetail?resid=ORO



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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#155

Post by RTH10260 » Thu Apr 05, 2018 4:44 pm

from our flying reporter:




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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#156

Post by RTH10260 » Sat Apr 07, 2018 3:21 pm

short update by Juan Browne, you will not miss anything by skipping this clip. Management summary: it doesn't look like the spillway will be used this season.




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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#157

Post by Azastan » Sat Apr 07, 2018 4:57 pm

RTH10260 wrote:
Sat Apr 07, 2018 3:21 pm
short update by Juan Browne, you will not miss anything by skipping this clip. Management summary: it doesn't look like the spillway will be used this season.
I don't know if that's a plus or a minus for the people who rely on that water.



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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#158

Post by much ado » Sat Apr 07, 2018 5:22 pm

Azastan wrote:
Sat Apr 07, 2018 4:57 pm
RTH10260 wrote:
Sat Apr 07, 2018 3:21 pm
short update by Juan Browne, you will not miss anything by skipping this clip. Management summary: it doesn't look like the spillway will be used this season.
I don't know if that's a plus or a minus for the people who rely on that water.
The diagram below was published last year. Water has been released this year through both the powerplant and the river outlet to keep the level in the reservoir low enough that the main spillway would not be needed. As a result, the level in the Orovile reservoir is at only 78% of the historical average for April 6. Most of the other state reservoirs are close to or above 100% of the April 6 average. (See the link to reservoir levels a few posts back.) So they are glad that the rain yesterday did not produce so much snowmelt and runoff that the main spillway was needed. That's what they hoped.

Diagram from: https://www.sfchronicle.com/bayarea/art ... 941922.php

Image



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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#159

Post by RTH10260 » Sat Apr 07, 2018 5:22 pm

Azastan wrote:
Sat Apr 07, 2018 4:57 pm
RTH10260 wrote:
Sat Apr 07, 2018 3:21 pm
short update by Juan Browne, you will not miss anything by skipping this clip. Management summary: it doesn't look like the spillway will be used this season.
I don't know if that's a plus or a minus for the people who rely on that water.
The Oroville lake is near full to the limit for safe operation without the spillway, other reservoirs are near to full (check post and link further up). It's a plus for the workers that the spillway does not get used cause they can plan to renovate / rebuild the spillway on the optimal timeline.



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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#160

Post by Azastan » Sat Apr 07, 2018 6:20 pm

Thanks, I reckoned it was probably more of a good thing that the spillway wasn't needed. My spouse was in Yuba City last week visiting his mother and had mentioned that the rivers were running full.



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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#161

Post by RTH10260 » Wed May 02, 2018 6:55 pm

A DWR presentation




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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#162

Post by RTH10260 » Fri May 04, 2018 8:00 am

Our flying reporter with a fresh update too




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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#163

Post by RTH10260 » Sun Jun 10, 2018 1:11 pm

Progress on rebuilding the Oroville spillway




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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#164

Post by Azastan » Sun Jun 10, 2018 3:05 pm

I feel sorry for the worker who broke his leg, but WHOA, I am sure glad I was not the person in the excavator!



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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#165

Post by GlimDropper » Sun Jun 10, 2018 3:50 pm

I love the controlled explosions finishing off the old upper spillway (@6:45), power and precision.



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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#166

Post by Foggy » Sun Jun 10, 2018 4:09 pm

Azastan wrote:
Sun Jun 10, 2018 3:05 pm
I feel sorry for the worker who broke his leg, but WHOA, I am sure glad I was not the person in the excavator!
Whaddya mean? That guy got a ride better than an E ticket at Disneyland! :dance:


Mr. William L. Bryan is the root of a great deal of criminal mischief. And yet, Mr. Bryan remains at large.

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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#167

Post by RTH10260 » Mon Jul 16, 2018 8:19 pm

After being off for a camper holiday with family and stripping down the plane for the yearly revision, oour flying reporter is back again with an Orville update




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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#168

Post by RTH10260 » Tue Aug 14, 2018 5:56 pm

monthly Oroville update, no fly over this time




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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#169

Post by Azastan » Tue Aug 14, 2018 6:07 pm

The flyovers are the best part! Oh well, it's nice to see that they are progressing.



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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#170

Post by RTH10260 » Fri Sep 07, 2018 1:01 pm

a fresh update again with aerial view




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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#171

Post by RTH10260 » Fri Sep 21, 2018 8:10 pm

For once: boots on the ground...




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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#172

Post by RTH10260 » Tue Oct 02, 2018 9:33 pm

ten days later and we get part 2 of Juan Brownes report




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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#173

Post by RTH10260 » Tue Oct 16, 2018 11:37 pm

not directl about the dam but about the use of the stored water




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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#174

Post by RTH10260 » Thu Oct 18, 2018 4:37 pm




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Re: NON-BREAKING PROGRESS UPDATES RE: Oroville Dam

#175

Post by RTH10260 » Wed Oct 24, 2018 11:17 am

Crews are in the final rush for on-time delivery of the refurbished spillway for November 1st.
Race to the Finish on Oroville Dam Spillway Fix

October 3, 2018
Scott Blair

The Lake Oroville spillway’s 400-acre construction site is an intense flurry of activity. In one corner, an excavator driver uses an old tire as a squeegee to clean away loose rock and prep a foundation. In the steeply sloping spillway chute, a crane operator flies in a rebar cage to workers who tie it into neighboring chute wall segments. Everywhere, dump trucks buzz around the circuitous roadways while rock crushers and batch plants keep pace with dozens of dozers and excavators. Drones hover in the sky photographing and surveying the site, while inspectors pour over every detail of the finished assets.

The scale of the task is immense. Once the spillways are complete, crews will have moved over 1 million cu yd of earth, cleaned 239,000 sq yd of foundation bedrock and crushed 2.3 million tons of aggregate—all in just 18 months.

Seemingly chaotic but actually highly choreographed and sequenced, the $1.1-billion Lake Oroville Spillways Emergency Recovery Project moves at an ultra-fast-track pace for one important reason: to repair the structures in time to protect cities, farmland and hundreds of thousands of people downstream of Oroville Dam before Northern California’s rainy season begins in November. The scale of the task is immense. Once the spillways are complete, crews will have moved over 1 million cu yd of earth, cleaned 239,000 sq yd of foundation bedrock and crushed 2.3 million tons of aggregate—all in just 18 months.



https://www.enr.com/articles/45391-a-ra ... illway-fix




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