feet
above each other vertically, will enable the engineer to determine the
height of the dam and to ascertain the contents of the reservoir with
the water at any depth.
Reservoir Statistics.—On
the head-waters of one of the branches of the Yuba River in Nevada
County, at an elevation of fifty-three hundred feet above sea-level,
the North Bloomfield Company has established a complete system ol
reservoirs for the storage of water. Their Bowman reservoir and the
small ones above it contain about 1,050,000,000 cubic feet of water.
The catchment area is 28.94 square miles. The cost of the reservoirs
and dams to date is $246,707.51, including the cost of distributing
reservoirs.
The
Rudyard or English reservoir of the Milton Company since its
enlargement contains 650,000,000 cubic feet of water, having a
high-water area of 395 acres, fed from a catchment basin of 12.1 square
miles. The reservoir is formed by three dams. The back wall of the
centre dam has a vertical height of one hundred aad thirty-one feet.
The walls are of dry rubble stone covering a solidly filled timber
crib. The total cost of the reservoir to date is $155,000.
The
storage reservoirs of the Eureka Lake and Yuba Canal Company consist of
the French reservoir, 661,000,-000 cubic feet capacity, area 337.32
acres; Weaver Lake reservoir, 100,000,000 cubic feet capacity; and
Faucherie reservoir, 58,800,000 cubic feet capacity, high-water area 90
acres; having, therefore, an aggregate capacity of 819,800,000 cubic
feet of water.* The catchment basins of most of these reservoirs are in
a rugged, mountainous region, and in ordinary seasons 60 to 80 per
cent, of the rain and snow fall flows into the reservoirs.
Distributing Reservoirs.—Independent
of these reservoirs, all mines, at convenient distances from their
works, have what are called distributing reservoirs, which receive the
water from the main ditch for delivery to the
* See report of J. D. Hague, M.E., pp. 15, 16, and 17.
