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The Pamphlet Collection of Sir Robert Stout: Volume 63

10.—Water Guage

10.—Water Guage.

If any dispute shall arise between holders of water-rights deriving their supply from the same creek or water-course, relative to the quantity of water to which each of them, the said holders, is or may be entitled, the following shall be taken to be a head of water, and such holders shall be limited thereto:—

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A stream of water guaged by a box, 12 feet long, 10 inches deep, and 20 inches wide, all measured in the clear. The box shall be covered throughout. The upper or entrance end of such box may be left entirely open; but the lower end, or end of exit, shall be fitted with a bar 2 inches high, affixed to the floor of the box, and with a pressure or headboard, 6 inches deep, affixed to the top of the box, leaving an aperture of 2 inches in depth, and of the full width of the box.

(a.)If more than one sluice head of water requires to be guaged, the guage-box should be enlarged horizontally to ensure accurate measurement. But when this cannot be done owing to natural obstacles, or other sufficient reasons, the guage-box may be enlarged perpendicularly, in which case the depth of the pressure or headboard shall be reduced at the rate of 1 inch for every additional head of water that is perpendicularly measured.
(b.)The guage-box shall at all times be placed on a level. When water is taken from one source only, the supply shall be guaged 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 guage-box shall be placed immediately below such side stream, or the last of such side streams.
(c.)The velocity of the water above the guage-box shall, if required, be lessened by the construction of a dam bank, or by levelling the race for a distance of 30 feet; and such velocity shall not exceed an average of 1 foot per second in the said 30 feet, to be guaged by a float.