DWR: Crews will be ready to work on main Oro. Dam. chute May 1st

The Department of Water Resources is expecting to resume work on the main Oroville Dam Spillway chute in the beginning of May as long as the weather allows.

Posted: Feb. 21, 2018 6:45 PM

The Department of Water Resources is expecting to resume work on the main Oroville Dam Spillway chute in the beginning of May as long as the weather allows.

Scroll for more content...

In terms of the dollar amount, that number remains at $870 million, and the DWR is operating as if FEMA will reimburse about 75% of that cost.

Most of the work this year has been focused on the emergency spillway.

The underground secant pile wall that's being built up to 65 feet into bedrock is now 95% complete and will be done in March. This wall is being built 730 feet downhill of the emergency spillway.

They're also still working on the roller compacted concrete splash pad and will start placing the concrete as early as next week.

The RCC Splash pad, in conjunction with the secant pile wall, will armor the existing hillside, reducing the type of uphill erosion that occurred last February if the emergency spillway were ever to be used again.

As far as the primary spillway, that work is still scheduled to start at the beginning of May.

That work includes removing the original 730 feet leading up to the radial gates and replacing that portion with structural concrete.

The energy dissipaters at the base of the spillway will also be hydro blasted and resurfaced; when the main spillway is done in 2019, it will have a design capacity of 270,000 cubic feet per second. This is different than the operational capacity as the spillway has never exceeded 160,000 cubic feet per second.

The DWR still needs 1.2 million tons of aggregate for the remaining roller compacted concrete, and workers established a site next to the spillway and last began blasting and excavation operations which will continue into the fall .

Department spokespeople would not comment on any of the lawsuits that have been filed, saying they can't comment on pending litigations.

Related Content

Article Comments

Chico
Overcast
59° wxIcon
Hi: 65° Lo: 53°
Feels Like: 59°
Oroville
Overcast
62° wxIcon
Hi: 65° Lo: 54°
Feels Like: 62°
Paradise
Overcast
59° wxIcon
Hi: 58° Lo: 48°
Feels Like: 59°
Chester
Overcast
50° wxIcon
Hi: 51° Lo: 43°
Feels Like: 50°
Red Bluff
Overcast
57° wxIcon
Hi: 62° Lo: 54°
Feels Like: 57°
Willows
Overcast
59° wxIcon
Hi: 66° Lo: 54°
Feels Like: 59°
Much cooler and active weather ahead for your Friday
KHSL Radar
KHSL Temperatures
KHSL Watches & Warnings

Community Events