✨ Mining Regulations
METHOD OF GAUGING
Level of Water in Race.
10 in...
12 ft. 0 in.
LAID HORIZONTAL.
This box will give a discharge of about 66 cubic feet of water per minute. If more than one sluice head of water requires to be measured, the gauge box should be increased in width twenty inches for each additional head, all the other dimensions remaining as before. When this cannot be done, owing to natural obstacles or other sufficient reason, the gauge box may be enlarged perpendicularly, as follows:
The depth of the pressure or head board is to be reduced one and one-eighth inches, the aperture increased in height two inches, and the height of the gauge box consequently increased seven-eighths of an inch for each additional head of water that is perpendicularly measured, the height of the bottom bar and width of the box remaining constant throughout.
FOR ONE HEAD.
Pressure Board, 20 in. x 6 in.
Aperture, 20 in. x 2 in.
Bottom Bar, 20 in. x 2 in.
FOR TWO HEADS.
Pressure Board, 20 in. x 4 ½ in.
10 ½ in...
Aperture, 20 in. x 4 in.
Bottom Bar, 20 in. x 2 in.
FOR THREE HEADS.
Pressure Board, 20 in. x 3 ½ in.
11 ½ in...
Aperture, 20 in. x 6 in.
Bottom Bar, 20 in. x 2 in.
FOR FOUR HEADS.
Pressure Board, 20 in. x 2 ½ in.
12 ½ in...
Aperture, 20 in. x 8 in.
Bottom Bar, 20 in. x 2 in.
FOR FIVE HEADS.
Pressure Board, 20 in. x 1 ½ in.
13 ½ in...
Aperture, 20 in. x 10 in.
Bottom Bar, 20 in. x 2 in.
FOR SIX HEADS.
Pressure Board, 20 in. x ½ in.
14 ½ in...
Aperture, 20 in. x 12 in.
Bottom Bar, 20 in. x 2 in.
If the quantity to be vertically measured exceeds six heads, a separate box must be provided for the gauging of each six heads, or fraction of six heads.
When water is taken from one source only, the supply shall be gauged at the head of the race or the source of supply, but if the race is fed or supplied in part by any side stream or streams, the gauge box shall be placed immediately below such side stream, or the last of such side streams.
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Westland Provincial Gazette 1871, No 9
✨ LLM interpretation of page content
🗺️
Rules and Regulations of the County of Westland Gold Fields
(continued from previous page)
🗺️ Lands, Settlement & Survey9 March 1871
Gold Fields, Regulations, Mining, Claims, Westland