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Q r- c .. ~.' Bond retirement should have begun in January 1946 but no bonds were retired in either 1946 or 1947, although interest payments have been paid currently. ~ Needs for Development , , 16. Successful crop production in the Chino Valley Project area requires irrigation to augment the light precipitation. The water supplies available to the District, however, are not sufficient to irrigate adequately all of the 2,53B acres of land under irrigation. Supplemental water therefore is needed to furnish a more nearly ade- quate water supply for irrigation farms of the area. Plan of Development 17. Three alternative plans for improving the present ~~ter supply of the District w~re inv~stigated by the Bureau of Reclamation. Under the first plan, the connecting cut between Watson Lake and Wil- low Creek Reservoir would be widened and deepened to permit excess water from Granite Creek to be diverted and stored in Willow Creek reservoir which normally does not fill. This would result in develop- ing an additional water supply averaging 355 acre-feet annually. In addition the 11 miles of main cmlal would be lined either with three- inch reinforced concrete or with Ii inch Gunite lining to reduce exces- sive seepage losses. This plan was eliminated from further considera- tion because the storage of Granite Creek water which now spills would invite litigation with downstreom water users having rights asserted to be senior to those of the Chino Valley Irrigation District. In fact, downstream water users have stated that they would contest any attempt- to increase the capacity of present storage facilities of the District. Investigations therefore were concentrated on possibilities for utiliz- ing more effectively the present water supply. , 18. The second plan was confined to lining the 11 miles of main canal in the same manner as contemplated under the first plan. It was discarded because of the heavy expense, in relation to the amount of water saved, of reshaping the entire canal by use of compacted fill, and protecting it from erosion from side drainage. , ! 19. Under the third plan, all existing structures would be left unchanged but a 36-inch concrete pipe ~~uld be installed throughout the length of the main canal to reduce excessive transmission losses due -to' the canal extending through loose gravel, sand and loamy sand materials. It would also prevent present difficulties-caused by erosion of the canal from its collecting of side drainage. The present pump in the well of the District would be operated during the six-months of the irrigation season to augment the surface water supply. , . ~ ~ ~ ~ ~ ~~ 20. This plan was selected as the most attractive of the three, considering cost in relation to additional water that would be made available for irrigation, The elimination of canal erosion would reduce the costs of proper maintenance, and the reduction of seepage 4