Saving Seafood

Balancing Energy Production and Aquatic Resources in the Roanoke River

July 23, 2026 — At the Roanoke Rapids Dam, a hydroelectric facility on the Roanoke River in North Carolina, NOAA Fisheries collaborated with Dominion Energy and partners to evaluate how adjusting the flow of water affects migratory fish and mussel populations in the river. Monitoring results are helping to ensure these aquatic organisms have the water flow and habitat they need, while maintaining robust energy production.

When large hydroelectric dams are constructed, the natural river flow is often modified. Water may be diverted through a hydroelectric powerhouse to generate electricity, then into an engineered channel. As a result, portions of the natural river may be cut off or receive less frequent water flow. This alters the river habitat below the dam, which can affect fish and aquatic organisms.

Since the Roanoke Rapids Dam was built, dam operators have diverted a majority of the water flow through a constructed channel so it can be used for electricity generation. This cut off water flow in a portion of the natural river, which became known as the bypassed reach.

In 2004, the Federal Energy Regulatory Commission issued a new license to Dominion Energy to operate the hydroelectric dam. At that time, NOAA Fisheries worked with Dominion Energy and other state and federal resource agencies to develop a new, multi-staged water flow pattern for the bypassed reach. Water flow would be increased during certain times of the year to ensure enough habitat was present for American shad and other migratory fish downstream. Three flow levels were planned for the first 20 years of the license: low, medium, and high. The new license also called for regular surveys to monitor the response of fish and aquatic organisms to the different flows.

In 2024 and 2025, scientists evaluated how the three flow levels had affected American shad, eel, and mussels. The results showed that populations in the bypassed reach increased during the medium and high flows, compared to the low flow level. However, the benefits of the high flow pattern were not significantly different from the medium flow pattern. That meant more water could be diverted to the powerhouse for energy production, without negatively impacting fish and mussels.

Based on these findings, Dominion Energy will use the medium flow pattern for the remaining 18 years of the hydroelectric license at Roanoke Rapids Dam. This allows them to generate more electricity during periods of peak demand, while also providing enough water in the river for migratory fish, like American eel and American shad, and other aquatic organisms like mussels during critical stages in their life cycles. The result is a win-win between resource agencies and industry, with parties coordinating closely and recognizing the importance of balancing power production and aquatic resources.

Read the full article at NOAA Fisheries

World’s largest dam removal project gets approval

August 4, 2023 — In a historic move, U.S. regulators have given the green light to a groundbreaking plan to demolish four dams on the lower Klamath River in California, paving the way for the largest dam removal and river restoration project in the world.

The Federal Energy Regulatory Commission’s unanimous vote on the proposal represents a major milestone for the $500 million demolition plan, which has been ardently supported by Native American tribes and environmentalists for years. The ambitious initiative aims to restore the lower half of California’s second-largest river to its natural free-flowing state, effectively opening up hundreds of miles of critical salmon habitat.

For Native tribes that have relied on the Klamath River and its salmon for their way of life, the dam removal represents a long-awaited victory. Situated in a wild and remote area straddling the California and Oregon border, the dams’ presence has hindered the migratory routes of salmon for over a century. With the removal of these barriers, the salmon’s path to their spawning grounds will be restored, reviving not only the ecological health of the river but also preserving the cultural heritage of the tribes.

Read the full article at the National Fisherman

Gas pipeline would ‘rip up the clam beds’ in New Jersey for New Yorkers’ sake, foes say

March 27, 2019 — Richard Isaksen has been clamming and crabbing in Raritan Bay and fishing lower New York Bay for 50 of his 63 years. It’s a hard life, but it’s the only one he knows, and all he wants for himself and his fellow fishermen is to be able to keep plying those waters.

“We ain’t asking for nothing,” said Isaksen, of Middletown, who’s the skipper of the 65-foot fishing boat Isaetta and president of the Belford Seafood Coop in Monmouth County. “We just want to make a living.”

But that could much tougher, Isaksen said, if state regulators join federal counterparts in approving the so-called Rarian Loop, a 23-mile underwater natural gas pipeline that would run along the sea floor across Raritan Bay and Lower New York Bay to Brooklyn.

“They’re going to interrupt everything in the bay,” said Isaaksen, whose Monmouth County fishing cooperative belongs to a coalition of environmentalists, fishermen and elected officials opposed to the project. “They’re going to rip up the clam beds. They’re going to destroy the crab beds where the crabs bed down. And then it goes out to Brooklyn, south of the Rockaways, right? That’s where we do our fluke fishing.”

The Williams Companies, Inc., a Tulsa, Oklahoma-based company, has already been granted permits by the Federal Energy Regulatory Commission for the Raritan loop, part of Williams’ Northeast Supply Enhancement project, a $1 billion expansion of the 10,000-mile Transco Pipeline network stretching from Texas to New York.

Read the full story at NJ.com

Susquehanna River: Deal reached on fish, eel passage at Conowingo Dam

May 3, 2016 — Exelon Corp. has pledged in a deal announced last Monday to work to enhance spawning fish passage at Conowingo Dam over the next 50 years, seeking to revive the Susquehanna River’s meager stocks of American shad and river herring.

The Chicago-based company and the U.S. Fish and Wildlife Service said they had reached agreement to improve at least one of two fish lifts at Conowingo and meanwhile start trucking migratory shad and river herring upriver past it and three other dams in Pennsylvania.

The agreement comes after years of negotiations between the company and wildlife agencies and conservation groups, which were seeking to revive the once-legendary spawning runs of shad and herring. The number of returning fish each spring has been trending downward since the 1980s, and wildlife agencies and conservationists wanted Exelon to make potentially costly upgrades to fish lifts there as a condition of renewing its federal license to operate the hydroelectric facility.

The company’s license to operate Conowingo expired in 2014, but the Federal Energy Regulatory Commission has extended the permit while the parties — including Maryland —attempt to hash out their differences. An even more contentious issue involves what Exelon may have to do about the buildup of nutrient-laden sediment in the dam’s reservoir, which studies have shown could complicated efforts to restore the Chesapeake Bay’s water quality.

Read the full story at the Bay Journal