1. Teton Basin Study Teton Lake vs Teton Dam

7. Mean Annual Flows Henry’ Fork (at Ashton) 1394 cfs Fall River (at Yellowstone Canal) 905 cfs Teton River (at St. Anthony) 805 cfs Bitch Creek (Tributary of Teton) 350 cfs ? Conant Creek (Tributary of Fall River) 90 cfs ?

8. Comparison to Colorado Mean Flow Drainage Area Colorado River (at Dotsero, CO) 2097 cfs 4,394 sq. mi. Fall River (at Yellowstone Canal) 905 cfs 320 sq. mi. Teton River (at St. Anthony) 805 cfs 890 sq. mi. Total (Teton and Fall River) 1710 cfs 1, 210 sq. mi.

9. Spring Runoff (in cfs) Jan Feb May June June Max Fall River 437 407 22912227 3715 Teton River 426 387 16212111 4788

12. Comparisons Teton Dam Teton Lake Surface Elevation: 5,332 ft. Surface Area: 3.3 sq. mi. Head (at 100% full): 323 ft. Total Capacity: 288,250 ac. ft. Active Capacity: 200,000 ac. ft. Surface Elevation: 5,570 ft.* Surface Area: 6 sq. mi. Head: 500 ft.* Total Capacity (1): 215,040 ac. ft. Total Capacity (2): 253:440 ac. ft. Active Capacity: 200,000 ac. ft.* * To Be Determined