Saving Seafood

Maryland requires owner of Conowingo Dam to keep more pollution out of Chesapeake

April 30, 2018 — Gov. Larry Hogan’s administration is requiring the owner of Conowingo Dam to find a way to trap pollution that flows down the Susquehanna River and into the Chesapeake, threatening progress in cleaning up the bay.

For decades, pollution has built up behind the Conowingo. But the dam is now at its capacity and no longer traps sediment and nutrient runoff from across Pennsylvania.

Maryland Environment Secretary Ben Grumbles said a set of “stringent environmental conditions” imposed Friday is part of a broader strategy to speed bay cleanup “and hold our partners accountable for doing their part to create a healthier watershed.”

Dam owner Exelon Corp. needs a water quality permit from Maryland to get a federal license to continue operating. The state issued the new permit with a requirement that Exelon develop a plan to continue trapping the same amount of pollution the Conowingo always has — millions of pounds of nitrogen and hundreds of thousands of pounds of phosphorus every year.

Sediment and nutrients like nitrogen and phosphorus degrade the Chesapeake ecosystem by clouding waters and blocking sunlight, and by fertilizing algae blooms that strip the water of oyxgen.

The permit also requires Exelon to more frequently collect floating trash and debris that builds up at the dam’s edge, potentially through a solar-powered trash wheel like one that has helped clean up Baltimore’s Inner Harbor in recent years.

Read the full story at the Baltimore Sun

 

Long slog ahead for new attempt to move shad past Conowingo, other dams

June 15, 2016 — Leon Senft remembers a time when he and other fishermen lined the shore of the Susquehanna River below the Conowingo Dam and hooked American shad almost as fast as they could cast their lines in the churning water.

“We really had a bonanza there for a while,” recalled Senft, 85, who’s been angling for the big migratory fish longer than most people are alive. “It was not unusual to catch 50–100 a day. My personal best was 175.”

That catch-and-release heyday for Senft was maybe 20 years ago, when American shad appeared to be on the rebound from a severe decline in their springtime spawning runs. Optimism abounded, as a big new fishlift hoisted more and more of them over the 94-foot dam on their way upriver to reproduce.

But the rebound went off the rails. Although the number of American shad getting a lift over Conowingo rose steadily for a decade, it then dropped and kept dropping.

Now, after years of study and negotiations, the U.S. Fish and Wildlife Service and Exelon Corp., Conowingo’s owner, have come up with a new plan for rebuilding the Susquehanna’s runs of American shad and river herring — related species that are even more depleted. In a press release announcing the deal in April, a federal wildlife official called it “a victory for everyone who lives or recreates on the Susquehanna River and the Chesapeake Bay.”

But those close to the situation are still cautious. Given the discouraging track record so far, they say, bringing these fish back will take a sustained effort for decades — if it can be done at all.

“I was around when we did this last time, 25 years ago,” said Bill Goldsborough, senior fisheries scientist for the Chesapeake Bay Foundation. “We thought that was going to do a lot more than it did.”

Read the full story at the Chesapeake Bay Journal

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