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  • Rapid Corps permit promotes Colorado, Utah species protection

    Projects designed to save endangered fish species in Colorado and Utah continue to receive fast-lane processing through a permit issued by the U.S. Army Corps of Engineers Sacramento District office in Grand Junction, Colo.

  • NR 13-043: Walleye in Center Hill Lake threatened by low dissolved oxygen levels

    LANCASTER, Tenn. (Oct. 11, 2013) – Over the past few weeks several dead walleye have been observed at Center Hill Lake. Walleye prefer a cool-water habitat, which means they are usually located fairly deep in the lake this time of year. This year the dissolved oxygen levels in this zone are very low. Data collected yesterday indicated that the only area deeper than about 35 feet that contains any oxygen is a zone between depths of 60-to-90 feet, and even there the levels are quite low.

  • Historic numbers of Chinook salmon passing Bonneville Dam

    Record-smashing numbers of Chinook salmon are heading up the Columbia River and may continue for several more days, the U.S. Army Corps of Engineers said today.

  • Counting Fish in a Fluid Environment

    On a hot, sultry, mid-August day, I’m standing thigh-deep in the slow, muddy Rio Grande watching U.S. Army Corps of Engineers’ Fishery Biologist Dr. Michael “Mick” Porter and Aquatic Ecologist Justin Reale; Eric Gonzalez, Michael Hatch, Matt McMillan, biologists with SWCA Environmental Consultants; and TetraTech biologist Michael Marcus seine for fish.

  • Fish behavior guides riverbank repairs

    The banks of the Sacramento River experience constant erosion and that's a big reason why Sacramento has some of the highest flood risk in the nation. It's also the reason the U.S. Army Corps of Engineers Sacramento District conducts an annual survey of the Sacramento River and its tributaries to determine where the worst erosion is taking place and which erosion sites should be repaired first.

  • Fish behavior guides riverbank repairs

    Reducing flood risk in an environmentally mindful way brought ecologists to the Coleman National Fish Hatchery in Anderson, Calif., March 25-27 2013, to surgically implant electronic tracking devices into hundreds of live fish to study their behavior in the Sacramento River system.

  • Going Green: The Silvery Minnow, Drought and the Rio Grande

    As signs of spring begin to show in the bosque, environmentalists, biologists and others continue their efforts to understand river flow issues along the Middle Rio Grande. Of particular interest are endangered species in relation to water use and jurisdiction. Within the past three years, the drought has proven to be a constant challenge to create and maintain a balanced environment for the silvery minnow to continue to spawn. Due to the drought, the environment needed for natural spawning is not present.

  • EL fish ecologists facilitate sturgeon swim study

    COHUTTA, Ga.--ERDC Environmental Laboratory’s (EL) Fish Ecology Team provided its mobile swim tunnel to the University of Georgia’s (UGA) Warnell School of Forestry and Natural Resources for a study of white sturgeon.

  • Cougar Reservoir going deep this week

    The U.S. Army Corps of Engineers is performing a “deep drawdown” of Cougar Reservoir this week, lowering the reservoir’s surface to 1,500 feet above sea level to test a possible method of improving downstream fish passage past Cougar Dam.

  • Fall Creek Reservoir to "go deep" again this week

    The U.S. Army Corps of Engineers alerts neighbors and visitors to Fall Creek Reservoir that the Corps plans to lower the reservoir’s water level well below normal winter levels this week to assist the downstream passage of juvenile spring Chinook salmon listed under the Endangered Species Act.