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~ MISSOURI RIVER BASIN PROJECT
. -- _, Farwell Unit. Nebraska
UStf General Information
Sherman Dam is the principal feature of the Farwell unit. It was constructed to provide
Type: Homogeneous earthfill
Location: 4. 5 miles (7. 2 kilometers) northeast of Loup City, Nebr. , on Oak Creek
68, 211 acre-feet (84, 138, 000 cubic meters)
Structural height: 134 feet (40. 84 meters)
Located in the dam near the toe of the left abutment and consists of a drop inlet or morning- glory- type inlet structure, an 8-foot-diameter (2. 44-meter) concrete, circular conduit, a hydraulic-jump-type stilling basin structure, and an outlet channel. It is capable of discharging 1, 095 second-feet (31 cubic meters per second) back into Oak Creek.
Located adjacent to spillway and consists of a drop-inlet-type inlet structure, 96-inch-
Arcadia Diversion Dam
Type: Concrete gate structure with embankment wings
Structural height: 36 feet (10. 97 meters)
Height above streambed: 8 feet (2. 44 meters)
Weir crest (spillway) length: 388. 5 feet (118. 49 meters)
Total crest length: J./7, 960 feet (2, 426. 20 meters)
Weir crest elevation: 2201. 00 (670. 86 meters)
Volume (cubic yards): 2/14, 000 (10, 704 cubic meters)
I/Includes length of desilting works.
Spillway: Twelve 30- by 10-foot (9.14- by 3.05-meter) radial gates
Sherman Feeder Canal
Capacity: 850 second-feet (24. 07 cubic meters per second)
Description: Most of its length either earth-lined or unlined with a maximum base width of 28 feet (8. 53 meters) and a maximum depth of 8. 5 feet (2. 59 meters)
Included as an integral part of the canal is the Sherman Tunnel. The concrete tunnel
Radiating southeasterly from Sherman Dam are a group of canals which convey supplemental water to some 52, 530 acres (21, 258 hectares). The Farwell Main Canal, with an initial capacity of 960 second-feet (27.18 cubic meters per second) begins at the outlet works below Sherman Dam. This canal, in addition to supplying water to irrigable land, also supplies water to the Farwell South and Farwell Central Canals. The Farwell Canals, for the most part, have unlined earth sections and have maximum capacities as follows:
Farwell Main and Lower Main--37. 5 miles (60. 3 kilometers)--960 second-feet
(27.18 cubic meters per second) Farwell Central--18. 5 miles (29. 8 kilometers)--170 second-feet (4. 81 cubic meters
Farwell South and Upper South--39. 7 miles (63. 9 kilometers)--340 second-feet (9. 63 cubic meters per second)
Note: Metric equivalents are in parentheses ( ). See appendix E for conversion factors.
Frontispiece. --Aerial view of downstream face of Sherman Dam. Spillway outlet is at left, and control house, outlet works and beginning of Farwell Main Canal are in center. P-707-D-42952 FOREWORD
Technical records of design and construction are a series of publications which record the planning, design, construction, and initial operation of Bureau of Reclamation structures.
This technical record of design and construction for Sherman Dam is divided into three parts. Part I is devoted to general planning, historical information, a brief description of the features, a summary of costs and geology. In part n, there are three chapters covering the design of the various features and their components. Part HI contains one chapter on contract administration and one chapter comprising a concise narration of construction operations.
This technical record was prepared by the Technical and Foreign Services Branch of the Office of Chief Engineer in Denver, Colo., from final design reports submitted by the design branches, final construction reports and cost information submitted by the field offices, and various planning reports. Acknowledgment is gratefully made to the designers and field personnel for their contributions to this work.
There are occasional references to proprietary materials or products in this technical record. These must not be construed in any way as an endorsement, as the Bureau cannot endorse proprietary products or processes of manufacturers or the services of commercial firms for advertising, publicity, sales, or other purposes.