Miner's inch: Difference between revisions
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*[http://www.idwr.idaho.gov/water/rights/INST_FOR_APP_FOR_PERMIT_10-10-2007.pdf Idaho government definition] |
*[http://www.idwr.idaho.gov/water/rights/INST_FOR_APP_FOR_PERMIT_10-10-2007.pdf Idaho government definition] |
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*[http://www.leg.state.nv.us/NRS/NRS-533.html Nevada government definition] |
*[http://www.leg.state.nv.us/NRS/NRS-533.html Nevada government definition] |
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*[http://legis.state.sd.us/statutes/DisplayStatute.aspx?Type=Statute&Statute=46-1-7 South Dakota government definition]*[http://www.leginfo.ca.gov/cgi-bin/displaycode?section=wat&group=00001-01000&file=1-26 California government definition] |
*[http://legis.state.sd.us/statutes/DisplayStatute.aspx?Type=Statute&Statute=46-1-7 South Dakota government definition] |
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*[http://www.leginfo.ca.gov/cgi-bin/displaycode?section=wat&group=00001-01000&file=1-26 California government definition] |
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[[Category:Units of flow]] |
[[Category:Units of flow]] |
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Revision as of 22:58, 15 March 2016
The miner's inch is a unit of flow in terms of volume per unit time, usually in relation to flow of water. The definition of a miner's inch varies by location.
In hydraulic mining and some forms of placer mining, as well as ore dressing, a large and regular supply of water is needed. 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 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'.
Definition
Historically, the unit lacked a firm definition or equivalent measurement, and varied by location, leading to confusion within the mining industry.[1][2] In 1905, its usage in California was standardized.[2] Today, the standards are:[citation needed]
- 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
State regulations sometimes forbid the use of the unit without its being associated with a definition in the same document.
References
- ^ Placer Mining. Scranton, PA: Colliery Engineering Co. 1897. pp. 76–80.
- ^ a b Wilson, E. B. (1907). Hydraulic and Placer Mining. New York: John Wiley & Sons. pp. 91–92.