All eyes on eroding dam spillway

All eyes on eroding dam spillway

All eyes on eroding dam spillway

Built between 1962 and 1968, the Oroville Dam lies about 150 miles (241 km) northeast of San Francisco.

Authorities lifted mandatory evacuation orders Tuesday for communities below the Oroville Dam.

"Officials now anticipate a failure of the auxiliary spillway within 60 minutes", The National Weather Service said in a warning on Sunday afternoon, urging residents to evacuate in a northward direction toward the town of Chico.

In the main spillway, which is lined, or paved, erosion has caused a hole nearly the size of a football field and at least 40 feet deep to form in the lower part of the channel.

However it was still standing almost three hours later as the department said crews would use helicopters to drop rocks to fill a gouge in the spillway.

"We have concluded it is safe to reduce the emergency evacuation order to an evacuation warning", said Honea, who had made the initial call Sunday to evacuate a large swath of three counties below the imperiled dam.

Water cascading into the Feather River from the damaged Oroville Dam spillway in Butte County, USA.

The surrounding area has been evacuated of almost 200,000 people in preparation collapse.

All eyes on eroding dam spillway

Still, evacuation orders remained in place. Engineers don't know what caused the cave-in, but Chris Orrock, a spokesman for the state Department of Water Resources, said it appears the dam's main spillway has stopped crumbling even though it's being used for water releases. Armoring rock and concrete was being placed around the erosion areas downstream of the emergency spillway, she added.

The Department of Water Resources plans to continue discharging flows at a rate of 100,000 cubic feet per second, with the hope of lowering the reservoir level by 50 feet. "If they lose that 30 feet that's gone".

Preston reports that the general consensus from the emergency response teams is that the situation will remain stable into Friday. Evacuation centers were opened for the people leaving the area.

But he said he was told later that the erosion was not progressing as rapidly as earlier feared and that the amount of water flowing over the spillway had dropped quickly.

Residents of Oroville, a town of 16,000 people 65 miles (105km) north of Sacramento, were told to head north. If the level of the lake isn't lowered ahead of that storm, the lake could begin to overflow again, putting the emergency spillway at risk.

"The state is directing all necessary personnel and resources to deal with this very serious situation", Brown said in a statement Sunday.

DWR had said there has been severe erosion on the emergency spillway, not the main spillway which was damaged by concrete erosion on Tuesday.

Recommended News

  • 'The Walking Dead' Spoilers Season 7 Episode 11: Eugene's Compromise

    'The Walking Dead' Spoilers Season 7 Episode 11: Eugene's Compromise

    Another casualty from the meeting: Morgan (Lennie James) loses his aikido staff, a devastating loss for the season one veteran. As usual, it does not go well, especially when an argument with Richard ( Karl Makinen ) becomes a full-blown standoff.

    Bald Eagle live stream shows first egg of the season

    The eagle pair in the National Arboretum in Washington, DC, is keeping watch over an egg that was laid Sunday night. The foundation described itself as is a nonprofit devoted to protection and preservation of the bald eagle.

    Sargento Adds to Recall List After Contamination Concerns

    This might include random checks, increased safety procedures, or an entire supply chain overhaul. This ripple effect is something that manufacturers should pay close attention to.
  • Mid Transfer Window in IPL

    This move is hailed as a major boost to the IPL and will add value to the tournament helping the franchise model evolve. The transfer of a particular player will only take place if there is a demand from another franchise for the player.

    Iron Fist release date, cast and trailer for new Netflix series

    The latest Marvel show Iron Fist hits Netflix next month, and a behind-the-scenes featurette has been released. When is Iron Fist available to watch on Netflix? Marvel's Iron Fist was developed by Scott Buck.

    Northern Dynasty Minerals, Ltd. (NAK) Valuation According To Analysts

    The final trade was registered at $2.26 and the volume by the end of the day had touched 13,197,125 shares. TD Securities' target price indicates a potential upside of 67.79% from the company's current price.
  • Charlie Hunnam Shares Thoughts on 'Sons of Anarchy' Spinoff

    Charlie Hunnam Shares Thoughts on 'Sons of Anarchy' Spinoff

    Other previous characters from " Sons of Anarchy " are also now having their respective projects on the small and big screens. EW has learned the actor will play Esai "Taino" Osorio, the smart and deadly head of the Mayans' Santo Padre Charter.

    7th Pay Commission: Committee on Allowances likely to present its report tomorrow

    After protests and much debate, the commission which was adjudged to give a report on the 7th Pay Commission is expected today. It has been almost eight months since the Narendra Modi government cleared the recommendations of the Seventh Pay Commission.
    Westbound Highway 50 Shoulder Near Bridal Veil Falls Collapsing

    Westbound Highway 50 Shoulder Near Bridal Veil Falls Collapsing

    The department says units have also responded to multiple reports of flooded roadways and trees down across the entire county. There have been countless eye-popping images from the seemingly relentless storms up and down California.
  • Kentucky Derby newest odds and predictions

    Kentucky Derby newest odds and predictions

    The horse almost caught Always Dreaming in Florida but finished the second. - Gunnevera is among the favorites in a betting line. The May’s first weekend has already passed and real fans of races started their preparations for the Derby in Kentucky.

    Fairmount Santrol Holdings Inc. NYSE:FMSA Sees Unusual Volatility in Session

    The stock is now moving above its 20-Day Simple Moving Average of 6.97% with the 50-Day Simple Moving Average of 6.97 percent. The Moving Average SMA50 is 6.97% while SMA200 is 45.67%. (NYSE:FMSA) is now showing its ROA ( Return on Assets) of -16.8%.

    Toyota Prius Prime vs Hyundai Ioniq: Which Tech Suits You Best?

    The new vehicle is outfitted with pedestrian detection, radar cruise control and lane departure alert with steering assist. The new Hyundai Ioniq can be purchased in three different versions, ranging from hybrid to an electric vehicle .

We are pleased to provide this opportunity to share information, experiences and observations about what's in the news.
Some of the comments may be reprinted elsewhere in the site or in the newspaper.
Thank you for taking the time to offer your thoughts.