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Goals For Changes In Pelton-Round Butte Dam Complex Operations

  • The goals for changed operations of the Pelton-Round Butte Project should be to:
    • Meet the requisite water quality standards for pH, dissolved oxygen, and nuisance periphyton as required by the Pelton-Round Butte Dam Section 401 Certificate Water Quality Management and Monitoring Plan, as well as those standards set forth by state and federal law.
    • Eliminate nuisance periphyton communities.
    • Re-establish healthy macroinvertebrate populations.
    • Maintain or improve fish reintroduction efforts above Round Butte Dam.
  • This would be accomplished by:
    • Developing additional methods to support reintroduction of anadromous species above the reservoirs.
    • Recalibration of surface water withdrawal with management of nutrient load as a priority goal.
    • Determining a baseline of present conditions from the Reregulation Dam to the mouth.
    • Monitoring the full 100 miles of the lower Deschutes River for the following parameters:
      • Temperature, pH, dissolved oxygen, chlorophyll-a, periphyton and nutrients. Dissolved oxygen and pH collected with continuous data recorders over a minimum of 24hrs per sample period.
    • Monitoring of biological impacts to include algal communities, algal biomass, and macroinvertebrates.
    • Portland General Electric/The Confederated Tribes of the Warm Springs Reservation, as owners/operators of the Pelton-Round Butte Project, join with the DRA to encourage the Oregon Department of Environmental Quality to complete TMDLs for the upper and lower Deschutes basins within an acceptable time period.


Nuisance periphyton on the lower Deschutes River
Nuisance periphyton on the lower Deschutes River
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