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

MAINE: Maine seeks new ESA tools to speed Atlantic salmon recovery

July 16, 2026 — The Maine Department of Marine Resources (DMR) is asking federal fisheries officials to evaluate whether existing authorities under the Endangered Species Act (ESA) could help accelerate Atlantic salmon recovery while maintaining current protections.

In a June 4 letter to the National Marine Fisheries Service, DMR Commissioner Carl Wilson requested that NOAA review whether the ESA could provide additional flexibility to expand Atlantic salmon recovery efforts. The Bangor Daily News reported that the request could eventually create opportunities for tightly controlled, conservation-oriented catch-and-release fishing if the species recovers.

The request follows decades of habitat restoration, fish passage improvements and river connectivity projects that have benefited Atlantic salmon and other sea-run fish. However, Sean Ledwin, director of the DMR Bureau of Sea Run Fisheries and Habitat, said adult Atlantic salmon returns remain very low despite those investments.

Read the full article at the National Fisherman

MAINE: Maine is exploring a path that could bring back Atlantic salmon fishing

July 13, 2026 — The Maine Department of Marine Resources is asking a federal agency to review whether existing endangered species laws could provide new tools to accelerate Atlantic salmon recovery, an effort the state says could eventually create opportunities for tightly controlled catch-and-release fishing if the species recovers.

In a June 4 letter to the National Marine Fisheries Service, DMR Commissioner Carl Wilson asked the National Oceanic and Atmospheric Administration to evaluate whether authorities under the Endangered Species Act could provide additional flexibility to expand Atlantic salmon recovery efforts while maintaining existing federal protections.

The request comes after decades of habitat restoration, improved fish passage and river connectivity projects that have benefited Atlantic salmon and other sea-run fish, but adult Atlantic salmon returns remain very low despite those investments, according to Sean Ledwin, director of DMR’s Bureau of Sea Run Fisheries and Habitat.

Read the full article at the Piscataquis Observer

MAINE: Costs, fish, property values are factors in the future of 3 Mousam River dams

December 29, 2015 — KENNEBUNK, Maine — A Kennebunk electric utility is weighing whether to remove the three lowest dams on the Mousam River or face potentially costly upgrades to restore fish passage to a river that once hosted large runs of spawning fish.

Trustees at Kennebunk Light & Power District have until March 2017 to decide whether to seek federal relicensing of three dams that the nonprofit utility owns on the Mousam River or propose several alternatives for the facilities. One option under serious consideration – and being pursued by local conservationists and sportsmen – is the removal of some or all three of the dams, including the large Kesslen Dam located in the heart of downtown Kennebunk.

The Mousam River is the only major river system in Maine emptying into the Gulf of Maine that lacks any methods for fish such as American shad, alewives or Atlantic salmon to bypass the dams, effectively blocking them from accessing more than 300 miles of watershed. Removing the three dams would allow the lower 9 miles of the Mousam River to flow freely – although an additional 12 dams remain on the upper stretch of river – and is part of an intense river restoration push in Maine.

Read the full story at the Portland Press Herald

 

Conowingo Dam fish-lift overhaul urged to restore Susquehanna’s shad, eels

August 12, 2015 — Federal wildlife officials are calling for Exelon Corp. to overhaul its fish lifts at Conowingo Dam, arguing it’s the only way to revive the Susquehanna River’s depleted stocks of the iconic American shad, eels and other once-important fish.

In comments submitted to the Federal Energy Regulatory Commission, the U.S. Fish and Wildlife Service recommended the lifts be rebuilt and enlarged as a condition of renewing Exelon’s license to generate hydroelectric power at Conowingo.

The service also wants the power company to help more eels get upriver — by truck for now.

Rebuilding the dam’s fish lifts could cost millions of dollars. Exelon is reviewing the wildlife service’s prescription for improving fish passage, said Robert Judge, a spokesman for the Chicago-based parent of Baltimore Gas and Electric.

The service’s proposal comes after years of negotiations between Exelon and officials from Maryland, Pennsylvania and federal agencies over the dam’s relicensing, which has been hung up in part by debates over how to deal with a buildup behind the dam of bay-fouling sediment and nutrient pollution washed down the river.

The company’s license to operate Conowingo expired last year, but the federal commission has extended the permit while the parties attempt to work out their differences over the sediment buildup, fish passage and other issues.

“We’ve reached a crucial period,” said Genevieve LaRouche, supervisor of the wildlife service’s Chesapeake Bay field office. “It’s a 46-year license. It’s kind of a once-in-a-lifetime opportunity to do something.”

LaRouche said the service hasn’t costed out the upgrades yet. But state and federal officials have previously said current fish passage facilities could be tweaked for less than $1 million, while replacing both fish lifts could run $24 million or more.

Read the full story at The Baltimore Sun