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BUREAU OF RECLAMATION REPORT not related directly to the extension and should be independently investigated. The project extension would have no effect on municipal and industrial water supplies, flood and silt control, drainage, navi- gation, recreation, and stream pollution abatement. Extension Works and Costs The Pine River project extension would consist of the enlargement and extension of eight major canals and ditches, the construction of a new diversion dam, and the construction of numerous small distribution laterals. The largest canal affected would be the King Consolidated which would serve 9,620 acres in the western part of the Pine River project area. The canal would be enlarged to a capacity of 295 second- feet for 11.6 nules and extended for an additional 26.6 miles. Con- crete chutes would drop the water 80 feet at the beginning of the extension and 66 feet at a point 2.4 miles along the extension. The other canals and c;litches would be the Pine River Canal and the Myers- Asher, Bennet and Myers, Bear Creek and Pine River, Sullivan, Shroder Extension, and Thompson Epperson ditches. These would serve a total of 5,530 acres in scattered tracts throughout the project area. The new diversion dam would be a low concrete weir and compacted earth-fill dike that would be constructed at the head of the King Consolidated Canal to replace a temporary diversion structure. The laterals that would be constructed would extend from the main canal and ditch chan- nels to the individual tracts of project lands. Most of the work on existing canals should be undertaken during the nonirrigation season to avoid interference with canal operation. No unusual construction prob- lems would be involved. Detailed engineering information on the features included in the extension and the estimated construction costs of the features are sum- marized in the table on the following page. As shown by the table the construction costs would total $4,142,000 or $4,088,250 exclusive of nonreimbursable money expended for investigations and surveys from the Colorado River Development Fund. The cost estimates are based on December 1949'prices and include allowances for engineering, overhead, contingencies, and rights-of-way. The operation, maintenance, and replacement costs of the extension works would amount to about $15,150 annually on the basis of 1939-1944 prices. Annual payments in that amount would provide for proper opera- tion and maintenance and sufficient replacements to insure the works a useful life of 150 years. Extension Lands Lands in the extension inClude 1,360 acres of Class 1 land or land highly suitable for irrigation farming and 13,790 acres of Class 2 land g