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
2007: Data Table

Estimated Average Annual Irrigation Water Requirement (IWR) from Most Recent Update
River Basin Total IWR Active
Irrigated
Lands		 Unit IWR Total IWR Unit IWR
Wet Normal Dry Wet Normal Dry
ac-ft acres ac-ft/ac ac-ft ac-ft/ac
 Bear (2011)1   99,401   64,000   1.54                   
 Green (2010)4   446,718   334,500   1.34   486,531       406,905   1.34       1.22 
 Northeast (2003)   103,000   77,000   1.33   95,000   103,000   126,000   1.23   1.34   1.64 
 Platte (2006)2   658,000   612,000   1.08                   
 Powder/Tongue (2002)   238,000   161,000   1.47   217,000   238,000   289,000   1.35   1.48   1.8 
 Snake/Salt (2014)   84,671   99,029   0.855   84,671   84,671   84,671   0.855   0.855   0.855 
 Wind/Bighorn (2010)1   1,178,600   634,300   1.86                   
 Total (2007)  2,940,000   1,944,000   1.473            

Values in RED indicate basins updated since previous statewide plan.

  1. Bear and Wind/Bighorn River Basin Plans did not calculate normal, dry, and wet year scenarios but overall averages.
  2. Platte methodology does not afford calculation of irrigation water requirement; values estimated by applying average CU:IWR ratio from other basins.
  3. Average unit IWR.
  4. Normal CIR was not calculated in this Agricultural Use Memo, WYRAG Memo, 2009. Total IWR/CIR and Active Irrigated Lands are both average values of the wet and dry year numbers.