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Resources - Measurements and Conversions

Measurements and
Conversions


Section Township
Range


State of Colorado
River Basins


Denver Basin Aquifers


Federal and Regional Resources


Droplets of Water Wisdom




cfs = Cubic Feet Per Second
af/yr = Acre-Feet Per Year
af/mo = Acre-Feet Per Month
gpm = Gallons Per Minute


Equivalency Table
cfs 1.00 1.38 1.66 2.23
af/yr 724 1000 1200 1620
af/mo 60 83 100 135
gpm 449 619 745 1000


1 cfs 646,300 gals. per day
449 gpm
per 24 hrs. 1.983 af
per 30 days 59.5 af
per year 724.0 af
1 gpm 1,440 gals. per day
0.0022 cfs


1 acre foot 0.504 cfs - day
43,560 cubic feet
325,900 gallons
1 cubic foot 7.48 gallons
62.4 lbs. of water
1 million gallons 1.548 cfs - day

Miner's Inches*

State

Conversion

Colorado and
Default values for other states

38.4 miners inches = 1.0 cfs

1 miners inch = 11.7 gpm

California*

40 miners inches = 1.0 cfs

1 miners inch = 11.2 gpm

*The term "miner's inch" is not definite without specification of the head or pressure. It has been defined as the amount of water that will pass in twenty-four hours through an opening one inch square under a pressure of six inches, however, it varies by locality.
-Alfred H. Ricketts, American Mining Law with Forms and Precedents, 4th ed., California Division of Mines Bulletin 123, p.26 (Feb. 1943).

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