USGS designs fishway for Little Falls Dam

Potomac River fish get a boost from Massachusetts scientist

Note to Editors: After a ceremonial dam-breaking on Tuesday, Oct. 12 at 10:30 a.m., USGS scientists will be available for interviews on anadromous fish, river engineering, Potomac river flow and drought; photo opportunities will exist during demonstrations of the working fishway model. Directions at end of press advisory.

Interior Secretary Bruce Babbitt joins federal, state and local government agencies and private organizations at a dam-breaking event for invited officials and other guests at the Little Falls Dam on the Potomac River to celebrate the placement of a novel fishway designed by the USGS. The ceremonial dam-breaking will occur at 10:30 a.m. on October 12.

"For seven years I've watched hundreds of cities restore their communities by restoring their rivers," said Babbitt. "Since 1959, Little Falls dam has kept seven species of shad, herring, perch and striped bass from spawning in our neighborhood. That ends today. Under an innovative new fishway designed by the USGS, the current still flows downstream but now the fish can flow back up. And I've got my fishing rod ready to meet their return."

USGS scientist Mufeed Odeh at the S.O. Conte Anadromous Fish Laboratory in Turner Falls, Mass., has designed a new fish passage device for Little Falls Dam based on the hydrological and engineering requirements of the dam and the biological needs of migrating fish, especially American shad, that are expected to use the passageway.

American shad and other anadromous fishes ascend rivers from the sea for spawning as part of their normal life cycles. The 12-foot vertical barrier created by the dam at Little Falls prevents the fish from reaching about 10 miles of historical prime breeding and spawning habitat above the dam. The inability of the fish to traverse the dam m

Contact: Olivia Ferriter
United States Geological Survey

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