The miner's inch
is a unit of flow in terms of volume per unit time. It is sometimes used in relation to flow of water
- 1/60 ft³/s (472 mL/s) New Zealand
- 1/50 ft³/s (566 mL/s) southern California, Idaho, Kansas, Nebraska, New Mexico, North Dakota, South Dakota, Utah, Washington
- 1/40 ft³/s (708 mL/s) Arizona, northern California, Montana, Nevada, Oregon
- 1/38 ft³/s (745 mL/s) Colorado
- 1/36 ft³/s (787 mL/s) British Columbia
The miner’s inch was derived from the amount of water that would flow through a hole of a given area and a given pressure (for example, 4-6 inches of water, or 1-1.5 kPa). The word 'inch' actually refers to the area of the hole in 'square inches'. State regulations sometimes forbid the use of the unit without its being associated with a definition in the same document.