By Dylan J. Darling
the fish ladder project at Opal Springs Dam
About the dam and the multimillion-dollar project, according to the website OpalSpringsPassage.org:
• The Opal Springs Dam diverts the Crooked River into pipes, delivering water to spin a turbine. At normal flows, most of the river is diverted, leaving 50 cubic feet per second of water directly below the dam, where the river is back to full strength.
• As part of installing a fish ladder, the diversion wall would be raised 2 to 6 feet using inflatable bladders to increase the amount of water in the pool.
• The changes would provide water to fill the fish ladder as well as additional water when needed to assist with downstream passage.
The big effort to restore ocean-going fish runs in Central Oregon’s major rivers has put the focus on a small diversion dam a half-mile up the Crooked River from Lake Billy Chinook.
Tucked into the Crooked River canyon, the Opal Springs Hydroelectric Project diverts water from the river through a power-producing turbine for the Deschutes Valley Water District. The structure also prevents salmon and steelhead from swimming upstream.
Over the past three years, fish tracked with radio tags by Portland General Electric through Billy Chinook, particularly steelhead, overwhelmingly swam to the Crooked River arm of the lake, said Brett Hodgson, district fish biologist for the Oregon Department of Fish and Wildlife in Bend.
That piqued the state’s interest in seeing a fish ladder installed at the diversion, he said, which would give the fish access to more than 100 miles of spawning and rearing habitat upstream.
“Passage at Opal Springs is the No. 2 fish passage project in the entire state for ODFW,” Hodgson said, “so we view it as critically important.”
The only fish passage project ahead of Opal Springs are the dams along the Snake River in Hells Canyon.
The state is not alone in its interest in Opal Springs. A contingent of fish and water groups — the Northwest Steelheaders, Central Oregon Flyfishers, the Native Fish Society, WaterWatch, the Crooked River Watershed Council, the Wild Salmon Center and the Wild Steelhead Coalition — have joined together to support a website, www.opal sprignspassage.org, explaining the situation and asking for donations to help change it.
Yancy Lind, conservation chairman of the Central Oregon Flyfishers and past president of the Northwest Steelheaders, said he spearheaded the website, the point of which is to raise visibility about Opal Springs.
Like Hodgson he said steelhead have been drawn to the Crooked River since 2012, when Portland General Electric and the Confederated Tribes of Warm Springs started releasing upstream-migrating fish into Billy Chinook’s waters. The power company and tribes co-own the Pelton Round Butte dam complex, which creates Billy Chinook. They began restoration efforts for salmon and steelhead last decade as part of renewing a federal license for the power-producing dam project. The centerpiece of the work is a $100 million submerged tower that helps direct fish migrating downstream.
For decades the Pelton Round Butte dam complex had been a barrier for fish trying to swim out to sea as they would become lost in the turbulent currents in the lake. Now with the tower in place, Portland General Electric and the tribes have been trapping steelehead and salmon coming in from the Pacific Ocean and up the Deschutes River, hauling them by truck and releasing them into Billy Chinook.
Once in the lake, the fish have three main options of where to go — the Metolius River, the Deschutes River and the Crooked River.
Data provided by Portland General Electric show so far the bulk of the fish, mainly steelhead, head to the Crooked River.
“The fish have clearly spoken,” Lind said.
But there they hit the Opal Springs diversion dam. While a trap-and-haul effort has been underway there, Hodgson said only about 50 percent of the fish swim into the traps. Installing a fish ladder would give the fish the ability to swim up and over the dam, he said, and greatly increase the number of fish making it upriver.
While the Opal Springs Hydroelectric Project, installed in the 1980s, is not due for a new federal license itself until 2032, Lind said he is encouraged to see the water district wanting to do something about the fish passage problem now. The diversion produces about 32 million kilowatt hours annually, power which the district sells to Pacific Power, according to the district website.
The district reached an agreement in fall 2011 with federal and state agencies, as well as Trout Unlimited, to add a fish ladder at Opal Springs.
As planned, the project would cost $7.5 million to $8 million in all, Hodgson said. The water district has already committed $4 million to the project and the Oregon Watershed Enhancement Board has put up $1 million so there are still millions of dollars left to find.
“The only thing we need to make this project go forward is money,” Hodgson said. He said there could be more grants available.
Lind said he hopes his website will also bring in money to support the cause.
While many restoration projects, including course correction and small dam removal, focused on Whychus Creek, a tributary of the Deschutes, for whatever reason the steelhead are drawn to the Crooked River, said Chris Gannon, executive director for the Crooked River Watershed Council.
“A lot of people have thought the Crooked is not the place these fish would want to go,” Gannon said.
Although the river can be warmer and have less water than other options, he said these factors could work in its favor. Steelhead rely on cues from the river to know when to migrate and the harsher the conditions in a river, the stronger these cues may be.
So far the fish are choosing the Crooked River.
“There is just no doubt about that,” Gannon said.
— Reporter: 541-617-7812, email@example.com
How are reintroduction efforts working for the fish?
“We are currently in the last month of the 2014/2015 return year. The good news is that we are getting a lot more fish back, the bad news is that, just like prior years, the fish all want to go up the Crooked.
In the 2013/2014 return year 50 steelhead adults were released into Lake Billy Chinook. 48 of these fish were radio tagged and 4 of those tagged fish were not subsequently found. … The final reading showed 26 steelhead in the Crooked River river or arm of the lake. 22 were passed above Opal Springs, 8 of which made it upstream of Highway 97. … 16 steelhead were in the Metolius arm of the lake and some were up river. Of those, 11 had first attempted to go up the Crooked River. No steelhead were planted in the Metolius and it is not their historical habitat.
One fish was in the Middle Deschutes and one was in the Deschutes arm of the lake. As of the end of the 2013/2014 season, three adult steelhead and three Chinook have returned to the Middle Deschutes/Whychus Creek in all return years combined.”
— Email from Yancy Lind, with OpalSpringsPassage.org