Wyoming State Water Plan, Wyoming Water Development Office
Rafting on Snake River Lake Marie, Snowy Mountains Wyoming Wind River Range picture

STATEWIDE FRAMEWORK PLAN: Updated Data Tables
UPDATED: Data Table

Table 4-1 Total Annual Flow1,2,3
Basin Area Ratio Based on
Normal
Conditions		 Yield
Wet Normal Dry
acres4 ac-ft/ac ac-ft ac-ft ac-ft
GREAT BASIN
  Bear River   960,000   0.55   888,000   526,000   234,000 
COLORADO RIVER
  Green River4   13,440,000   0.19   3,746,000   2,617,000   1,543,000 
MISSOURI RIVER
  Northeast Wyoming5   7,680,000   0.03   407,000   240,500   138,000 
  Powder/Tongue River   7,232,000   0.14   1,418,000   982,600   694,000 
  Platte River6   15,424,000   0.08   2,249,000   1,307,000   1,105,000 
  Wind/Bighorn River   12,928,000   0.36   5,856,000   4,629,000   3,514,000 
  Yellowstone River7   1,792,000   1.76   3,623,000   3,150,000   2,374,000 
COLUMBIA RIVER
  Snake/Salt River8   3,264,000   1.08   5,047,000   3,540,000   2,179,000 
Total  62,720,000   0.27   23,234,000   16,992,100   11,781,000 
  1. Estimates are based on outflow plus depletions from the current river basin plans.
  2. Depletion estimates are from the current river basin plans.
  3. Depleted flows are based on outflow estimates from the current river basin plans.
  4. Wyoming's Share of Green River Basin flows under the Colorado River Compact were not prepared in basin plan.
  5. Excludes the flows for the Little Missouri and Niobrara Rivers.
  6. The Platte River system is fully appropriated. Estimates exclude the flows and depletions from the Horse Creek and South Platte Drainages.
  7. Drainage area is within Yellowstone National Park and includes estimates for the Madison, Gibbon, Firehole and Gallatin Rivers.
  8. Excludes the flows for the Henrys Fork and Teton Rivers.