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To protect against evaporation Tgsize guzzlers patterned after the ng


in the smooth rock sides of natural catchment b86ins in which animals previously had drowned Water is guided into the storage wult by concrete or stone aprons IA some instances it is possible to te ad

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Document on Subject : "To protect against evaporation Tgsize guzzlers patterned after the ng"— Transcript:

1 To protect against evaporation, T&g-size
To protect against evaporation, T&g-size guzzlers," patterned after the ngeJ.linaaeous guzzlerss which Western States use to conserve water for upland birds, u~re developed, These consist of an underground storage vault, suitably covered to protect against the rays of the sun and with the wter made available to the animals by a ramp uhich permits them to walk to the water's edge, regardless of its depth. Such ramps have also been in the smooth rock sides of natural catchment b86ins in which animals previously had drowned. Water is guided into the storage wult by concrete or stone aprons. IA some instances it is possible to t&e advantage of natural coves on overhanging walls for shade protection against evaporation. IA other instances concrete dams are constructed across gullies or waterways. These dams are usually less than 4.0 feet long and about 10 or 12 feet high. For the first few years these dams impound water which is available for the sheep. Gradually, however, the area behind the dam is filled with sand, silt and rocks. Flood water sosklng into this gravel is stored and protected against excessive evaporation. Capped

2 pipes, which uere installed through the
pipes, which uere installed through the concrete dam when it was built, permit the utilization of this water supply, the drawcoff from the bottcQl being fast enough to supply the needs of the sheep but slow enough to make the supply last for many months. To protect the waterholes from use by animals which can firrd wzter elsewhere, the Fish and Wildlife Service places the waterholes in spots accessible only to bighorns or installs a special fence which permits the passage of sheep but which keeps out larger animala. That such protection is necessary is evidenced by the -&act that one of 10 horses completely utilized one small spring which had previously been used by 30 or ~$0 bighorns. The types of fence ususlly used has the lower strand high enough to permit the sheep to go under but lew enough to keep the horses out. Beoause horses have been able to paw down ordinary fences the Fish and wildlife Service has learned to take speoial precautions. A bra&et, about breast high, is placed on eaoh post. Barbed wire, strung along brackets, keeps the horse too far from the fence proper to allow any pawing down of the wires. xxx - P.N. 336