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0009Sli . nepvrt of the Regional Director wa tel' through the Ft. Laramie Canal to the Gering & Ft. Laramie Icrigation District at the state Une Wile 85.4), where it is measured by a Parshall flume; and for delivering water to the Lingle Powerplant. Water is also diverted from the Ft. Laramie Canal within the Goshen District to delivery points on several laterals crossing the state line, one of which is the Horse Creek Lateral. . 18. The need for a regulatorJ offstrea~ reservoir some place along the Ft. Laramie Canal was reco6nized in the original plan of developnent. The assumed velocity in the canal is 2.5 feet per second, or 1.7 miles per hour. That rate of flow imposes a delivery control problem on the Ft. Laramie Canal because of its 1)O-m11e length. Five days are normally required for water to flow from the Whalen Diversion D~ to the lower end of the project. Water that has been diverted to meet a specific demarxi now must be wasted back to the river should the need cease before the water reaches the point of delivery. Likewise when a derand cannot be anticipated in advance, as the occurrence of a sudden hot spell. water cannot now be delivered to the critical area in time to be of ~ximum benefit. This time lag in the control of water has been detrimental to the most economical ~se of water and to th~ Toast efficient delivery of water. Considera- tion has been given to enlarging the Ft. Laramie Canal but this was deemed uneconomical because it would necessitate expensive enlarge- cent of the tunnels at 1. ile L.7 and rile 13 (approximate). Enlarge- cent of the canal would only partially solve the problem because the waste of water to the river probably would be increased and the problen of well regulated delivery would still exist. 19. A reservoir site on Horse Creek, in Wyoming, was inclu:1ed in the original project plan by the Bureau of ~eclamation as shown on Exhibit 1, tl3enera.l Uap". Geologic investigations at several Horse Creek damsites disclosed the probability of excessive over- burden of gravel. hence the sites were deemed to be not feasible. 20. As a~ alternative, investigations were made of a reservoir site on Dry Creek Drain, in Nebraska. flater studies indicate that the combinod inflow to the potential reservoir from natural runoff of the 21.6 square mile drainage area of Dry Creek an:!. from unavoid- able wastes of the Ft. Laramie Canal and Horse Cree~ Lateral would have averaged a,Loo acre-feet annually during the pericxi 1933-19L6. The reservoir \volld not be used for storage purposes otrer than to impound water for release to the Horse Creek Lateral systen: upon demand. The reservoir co'ud also be fUled in the spring with surplus flood "aters from the ~;orth Platte River which the Guernsey Reservoir cannot store, by diversion to the Ft. Laramie Canal and release to the proposed reservoir through the wasteway at !'ile 88.3. The Horse Cree~ Lateral, below the Dr1' Creek diversion, serves about 8,100 acres of irrigable land. .Tith the potential reservoir i.n operation deliv- eries could be made to the Horse Creek Lateral system witbout . s (Rev.)