Upstream view of the Strathcona Dam. BC Hydro’s proposed upgrades include a deep excavated channel on the right of the dam and photo, and then the relocation of the spillway gates into the new channel. Where the existing gates are located, a concrete overflow spillway at a high reservoir level elevation is proposed. BC Hydro photo

Design work underway on Strathcona Dam upgrade near Campbell River

Project will allow facility to draw water in the event of an earthquake

Design work continues on BC Hydro’s Strathcona Dam upgrade in hopes of getting BC Utilities Commission approval in 2022.

The design of the water discharge upgrade to Strathcona Dam will allow for BC Hydro to draw down the Upper Campbell Reservoir level after a severe earthquake.

The upgrades will also provide better downstream water management reliability for downstream fish habitat flows to flood risk management.

“For a few years now we have been meeting and consulting with First Nations, government agencies and stakeholders on the project as we continue to refine the design,” says BC Hydro spokesperson, Stephen Watson. “While day-to-day it is very safe, the Strathcona facility has deficiencies that may limit its ability to operate or cause it to fail following a severe earthquake. A new low level outlet, which is a deep excavated channel, will allow us to lower the reservoir level after an earthquake to minimize risks to the dam. The final design will ultimately be developed and then we’ll go to the BC Utilities Commission for approval in around 2022.”

For BC Hydro there are two main project objectives.

First, to excavate a deep channel in bedrock on the right bank of the dam, and then construct a new water release outlet structure to allow for a deep reservoir level drawdown. The new structure is planned to be about 32 m long, 17 m wide, and 29 m high. The concrete structure will house two water discharge gates. The gates will allow the reservoir to be lowered below the normal operating level, which will reduce the risks to the dam. It will also provide downstream flood risk management operations. The channel length is about 330 metres.

Second, the project will remove the three 61-year-old spillway gates and hoist system and construct a new concrete passive overflow spillway. The crest of the spillway will be positioned so water only free-spills during large storm events. The two new gates within the excavated low level out channel will provide improved water management flexibility for fish habitat flows, power generation and flood risk management.

Watson said there are currently no plans to lower the water level at Upper Campbell Reservoir/Buttle Lake during construction. Construction of the low level outlet channel will take place downstream of a temporary rock plug, which is a portion of the channel at the upstream end that will be excavated last. Work on the overflow spillway will likely take place downstream of a temporary bulkhead or during low reservoir periods. The project, when completed, will not change BC Hydro’s existing water license for storage levels or water release, though the utility will go through a Change of Works application to the Comptroller of Water Rights on the facilities modified configuration.

“We are looking to have funding approval and regulatory approvals, such as the BC Utilities Commission, by around late 2023,” said Watson. “The procurement process may also begin in 2022 and construction may begin in early 2024.”

Watson said the road across the dam will be temporarily closed for about three years during the construction period. The existing Strathcona Dam Campground is planned to be permanently closed as early as late summer 2020, with the new Upper Campbell Reservoir Campground opening around the same time. The new campground will be managed by BC Hydro in the same way as the existing campground.

RELATED: BC Hydro to relocate popular Campbell River-area campground to ‘Little America’

Information on the project, as well as the proposed John Hart Dam Seismic Upgrade Project and Ladore Spillway Seismic Upgrade Project, is available at BC Hydro’s Campbell River Hydroelectric Facilities Discovery Centre at the Elk Falls parking lots, which is open Tuesday, Thursday and Saturday. Project community engagement comment forms are available to be filled out.

The Strathcona Dam holds back water within the Upper Campbell Reservoir/Buttle Lake. It’s located about 32 km west of the City of Campbell River. Constructed in the 1950s as part of the Campbell River hydroelectric system, the Strathcona Dam is 53 metres high and 511 metres long, and is made of compacted earthfill with a concrete spillway structure. In 2010, BC Hydro seismically upgraded the water intake tower, which allows water to enter and pass through the dam to the generating station.

For any enquiries about the project, contact Stephen Watson at 1-250-755-4795 or steve.watson@bchydro.com.

RELATED: Hydro announces more dam upgrades worth ‘hundreds of millions of dollars’

Get local stories you won't find anywhere else right to your inbox.
Sign up here

 

Strathcona Dam and a diagram of the proposed works to the right bank. It includes a deep excavated channel in bedrock, with improved water release facilities. BC Hydro graphic

Just Posted

The Kwiakah First Nation is looking to lease some Crown land at the old Campbell River Gun Range to create a community garden for its members and a series of greenhouses to sell produce to cover operational costs. Black Press File Photo
Kwiakah First Nation looks to open farm at old Campbell River gun range

City defers decision on allowing it until they can consult with other local First Nations

Lilly and Poppy, two cats owned by Kalmar Cat Hotel ownder Donna Goodenough, both have cerebellAr hypoplasia, a genetic neurological condition that affects their ability to control their muscles and bones. Photo by Alistair Taylor – Campbell River Mirror
VIDEO: Wobbly Cats a riot of flailing legs and paws but bundles of love and joy to their owner

Woman urges others to not fear adopting cats with disabilities

Shawn Decaire does a blessing ceremony for the Hama?Elas Community Kitchen in Campbell River. Photo by Marc Kitteringham, Campbell River Mirror
Hama?Elas Community Kitchen progress shared

Strategic planning, progress made on various projects also discussed at CRDCEH meeting

Forestry companies in B.C. agree to abide by the cedar protocols based on traditional laws of the First Nation members of the Nanwakolas Council. (Photo courtesy, Nanwakolas Council)
B.C. forestry companies agree to abide by cedar protocols drafted by Indigenous council

Western Forest Products and Interfor Corporation among companies to adapt declaration drafted by Nanwakolas Council

Campbell River city council has given unanimous support to its mayor to continue the fight for the aquaculture industry on our coast. Black Press file photo
Campbell River city council unanimous in support of fish farms

‘I’m certainly not willing to roll over and accept a bad decision,’ says one councilor

Keith the curious kitten is seen on Nov. 4, 2020 at the Chilliwack SPCA. Friday, Jan. 22, 2021 is Answer Your Cat’s Questions Day. (Jenna Hauck/ Chilliwack Progress file)
Unofficial holidays: Here’s what people are celebrating for the week of Jan. 17 to 23

Answer Your Cat’s Questions Day, Pie Day and International Sweatpants Day are all coming up this week

Is it time to start thinking about greener ways to package cannabis?

Packaging suppliers are still figuring eco-friendly and affordable packaging options that fit the mandates of Cannabis Regulations

JaHyung Lee, “Canada’s oldest senior” at 110 years old, received his first dose of the COVID-19 vaccine on Thursday, Jan. 14, 2021. He lives at Amenida Seniors Community in Newton. (Submitted photo: Amenida Seniors Community)
A unique-looking deer has been visiting a Nanoose Bay property with its mother. (Frieda Van der Ree photo)
A deer with 3 ears? Unique animal routinely visits B.C. property

Experts say interesting look may be result of an injury rather than an odd birth defect

Sooke’s Jim Bottomley is among a handful of futurists based in Canada. “I want to help people understand the future of humanity.” (Aaron Guillen - Sooke News Mirror)
No crystal ball: B.C. man reveals how he makes his living predicting the future

63-year-old has worked analytical magic for politicians, car brands, and cosmetic companies

Terry David Mulligan. (Submitted photo)
Podcast: Interview with longtime actor/broadcaster and B.C. resident Terry David Mulligan

Podcast: Talk includes TDM’s RCMP career, radio, TV, wine, Janis Joplin and much more

Seasonal influenza vaccine is administered starting each fall in B.C. and around the world. (Langley Advance Times)
After 30,000 tests, influenza virtually nowhere to be found in B.C.

COVID-19 precautions have eliminated seasonal infection

Prime Minister Justin Trudeau listens to a question during a news conference outside Rideau cottage in Ottawa, Friday, January 8, 2021. THE CANADIAN PRESS/Adrian Wyld
Trudeau says Canada’s COVID vaccine plan on track despite Pfizer cutting back deliveries

Canadian officials say country will still likely receive four million doses by the end of March

Jobs Minister Ravi Kahlon shared a handwritten note his son received on Jan. 13, 2021. (Ravi Kahlon/Twitter)
Proud dad moment: B.C. minister’s son, 10, receives handwritten note for act of kindness

North Delta MLA took to Twitter to share a letter his son received from a new kid at school

Most Read