Moses Lake, WA 98837, USA

Rock Island Irrigators meeting to be held March 13

All Rock Island Reservoir irrigators are urged to attend an informational meeting on Thursday, March 13 about the implications of the reservoir drawdown resulting from the discovery of a 65’ crack in a Wanapum Dam spillway on February 24.

According to a press release from the Washington State Horticultural Association, a drawdown of water levels upstream from Wanapum Dam in the Rock Island reservoir was initiated by Chelan County PUD to protect the power generating equipment at Rock Island Dam from catastrophic damage. Power generation ceased at Rock Island on March 3 until river levels could stabilize at 609 feet above sea level at the Rock Island Dam headwater. Under normal conditions, river levels in the Rock Island reservoir are between 612-613 feet. On March 8, Chelan PUD was able to restart power generation at Rock Island.

The extent and cause of the damage at Wanapum Dam is not known, the press release said. As a result, it is uncertain how long it will take to restore the river levels above Wanapum Dam to more normal conditions. There are three significant factors coming together that need to be considered:

  • Agricultural interests will need water to commence crop protection applications, frost protection and irrigation
  • Adult and juvenile salmon runs both upstream and down will require adequate river flows
  • Power generation and dam safety will need to be addressed

It is estimated that about 150 individual irrigators and three irrigation districts are drawing from the Rock Island reservoir. Grant PUD will be working with irrigators impacted by the drawdown to the Wanapum reservoir.

The March 13 meeting will be held from 5:30PM – 7:00PM at the Confluence Technology Center, 285 Technology Center Way, Wenatchee. For more information, contact Bruce Grim at bruce@wahort.org.

RSS WSDA RSS Newsfeed

  • WSDA issues 2018 dairy nutrient management grants November 2, 2018
    WSDA this week announced the recipients of eight water-quality project grants funded by fines issued to dairies for improper recordkeeping or manure management.
  • WSDA issues 2018 dairy nutrient management grants November 2, 2018
    The Washington State Department of Agriculture (WSDA) this week announced the recipients of eight water-quality project grants funded by fines issued to dairies for improper recordkeeping or manure management.
  • WSDA expands apple maggot quarantine into Methow Valley October 11, 2018
    WSDA is expanding the state`s apple maggot quarantine into parts of Okanogan County, in an effort to slow the spread of this invasive pest and protect commercial apple production.
  • WSDA trappers start annual hunt for pests May 31, 2018
    WSDA has begun its annual hunt for pests that threaten the state`s agriculture industry. Trappers are hitting the road to set traps throughout the state to monitor for the introduction or spread of a variety of invasive pests, including gypsy moths, apple maggot and Japanese beetle.
  • Season to treat invasive Spartina starts in June May 16, 2018
    The Washington State Department of Agriculture (WSDA) will begin this year`s treatment season for Spartina on June 1 with the treatments continuing through November. Survey and eradication efforts of the aggressive, noxious weed will take place in multiple areas, including Grays Harbor, Hood Canal, Willapa Bay, Puget Sound, the north and west sides of the […]