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Show On Crow Reservation, Mont., construction was continued on the Agency Canal and Little Big Horn No. 2 Canal, including necessary structures. Necessary maintenance and repairs were continued on Big Horn Agency, Lodge Grass, Pryor Creek, and other canals and ditches, which consisted in replacing the old wooden structures with concrete. At Fort Belknap, Mont., several timber structures were put in during the year and repairs made to others. A new concrete head-gate for the Milk River Main Canal was completed during the year. The construction on the pumping plant to irrigate about 6,000 acres of the best land on the Colorado River Reservation was under way during the entire year. The pumping plant has been completed with the exception of part of the building. About 8 miles of the canal system have been completed. On the Fort Mojave Reservation two pile jetties were constructed for the protection of valuable agricultural land froin the encroach-ment of the Colorado River. These jetties, while not permanent, diverted the current of the flood sufficiently to prevent further damage. Work was continued on the extension of the Spring Creek ditch for the irrigation of the Southern Ute allotments, about 83 miles of ditch and laterals having been completed. The only feasible project for the diminished Southern Ute Reservation has been constructed during this year for a distance of about 3 miles, covering about 600 acres. No construction work was done on the San Juan project in New Mexico, all efforts being confined to repairing damages caused by excessive floods during the year. On the Uintah Reservation, Utah, new work has been confined to the construction of such laterals as were required for present use: necessary maintenance and operation has been done, the force having been reduced accordingly. On the Yalrima Reservation, Wash., the drainage work started during the fiscal year 1911 was practically completed during the fiscal year 1912. Machinery was used almost exclusively, moving during the year a total of over a million cubic yards of material at an average cost of 8.34 cents per cubic yard. These ditches have drawn off water from a large area of land which has been producing crops by subirrigation. The irrigation activities have been restricted to operating and maintaining the system, no new work having been nn-dertaken on account of the condition of the water rights. In this connection it should be mentioned that at the closc of the year there was developed near the geographical center of the irrigable area a large artesian flow at a depth of 510 feet. |
