Study Zones

The Project area is broken into Study Zones (study areas) based on geo-political distribution.
(Click on map thumbnails to view larger maps, approx. 1M each.)

The 4 Study Zones are:

  1. Glacial Lake Missoula—Montana
  2. Idaho Panhandle & East Central Washington—Washington/Idaho
  3. Mid-Columbia—Washington/Oregon
  4. Gorge, Lower Columbia, and Willamette—Washington/Oregon




1. Glacial Lake Missoula

Montana: Area includes all of historic Lake Missoula, including the Clark Fork to the state line.

Target dates for Study Zone meetings (Missoula, Montana):




2. Idaho Panhandle and East Central Washington

Washington/Idaho: Areas include Pend Oreille, Coeur d’Alene, Post Falls, Spokane, Odessa, Moses Lake, Coulee Dam, Channeled Scablands area, Dry Falls, Potholes, and the area north of State Route 26.

Target dates for Study Zone meetings (Spokane, Washington):

  • June 3, 4
  • August 5, 6
  • Spring 2000



3. Mid-Columbia

Washington/Oregon: Tri-Cities, Walla Walla, the area south of State Route 26, Yakima, Umatilla, Hermiston, to the John Day Dam.

Target dates for Study Zone meetings (Richland, Washington):

  • June 8, 11
  • August 10, 11
  • Spring 2000



4. Gorge, Lower Columbia, and Willamette

Washington/Oregon: includes the area west of the John Day Dam, Stevenson, the Dalles, Hood River, Astoria, Portland, Eugene, Salem, Vancouver, Longview, and up the Cowlitz River to Castle Rock.

Target dates for Study Zone meetings (Portland, Oregon):

  • June 15, 18
  • August 17, 19
  • Spring 2000


Joint Study Team Meeting (Moses Lake, Washington):

Composition of Study Zone Working Teams

Duties of Study Zone Working Teams