Water Measures and Equivalents

1 acre-foot == 43,560 cubic feet == 325,900 gallons (an acre-foot is the amount of water required to cover one acre one foot deep)

1 cubic foot == 62.4 lbs. water == 7.48 gallons

1 cubic foot per second (cfs) == 448.8 gallons/min

• 1 cfs for:
  • 1 hour == 26,930 gallons == 0.083 acre-feet
  • 1 day == 646,400 gallons == 1.983 acre-feet
  • 30 days == 59.5 acre-feet
  • 1 year == 724 acre-feet

1 million gallons (mg) == 3.07 acre-feet

1 million gallons per day (mgd) == 1.55 cfs == 1,120 acre-feet/yr

Typical water flows and storage capacity to help put these measures into perspective:

• Average flow of the North Platte River at Fort Steele == 1,158 cfs
• Peak flow of the North Platte River at Fort Steele (1988) == 6,160 cfs
• Average annual discharge of the North Platte River == 839,000 acre-feet
• Storage capacity of Alcova Reservoir == 184,000 acre-feet