Miner's inch

The miner's inch is a method of measuring the amount of flow a particular water supply system (such as a flume or sluice) is capable of supplying.

The miner’s inch measures the amount of water that would flow through a slot of a given area at a given pressure (for example, at a head of 6 inches of water, or 1.5 kPa.)

Historically, the unit lacked a firm definition or equivalent measurement, and varied by location, leading to confusion within the mining industry.

[2] Today, standards vary across jurisdictions, with values between 1⁄60 and 1⁄36 cu ft/s.

State regulations sometimes forbid[citation needed] the use of the unit without its being associated with a definition in the same document.