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lr: ~ c: ... ~/~.~ ~-_J Springs Springs originate from the lower edges of talus deposits on the west slope of the West Elk Mountains in Gunnison National Forest. The town of Crawford pipes an adequate municipal supply of water from a spring in sec. 8, T. 15 s., R. 91 W. Another spring in secs. 12 and 13, T. 50 N., R. 6 W., is planned for development by the cathedral Wdter Association. Both springs are at elevations above 7,000 feet and are relatively inaccessible between November and May, owing to mud and snow. A laboratory analysis of the spring water used by Crawford is shown on table 1. The chemical quality of Crawford water is better (where comparison can be made) than that of water from the King well, which taps the Dakota Sandstone. RECOMMENDED PLANS FOR DEVELOPMENT OF PARK SERVICE WATER SUPPLIES Three plans are submitted for developing a water supply for the Park Service recreation area at Crawford Reservoir: (1) drill a test well to penetrate the Dakota Sandstone completely at the recreation area; (2) develop water supplies from the Smith Fork, upstream from the Iron Creek confluence; and (3) develop springs in Gunnison National Forest. plan l.--Drill a test well to tap the Dakota Sand- stone at the Park Service proposed well site. (See figs. 2 and 4.) By fully penetrating the Dakota, a yield of at least 15 gpm can be obtained. For well- completion planning, the driller should keep an accurate log, noting depths of all changes in rock cuttings and in drill speed. Representative rock cuttings should be taken at 5-foot intervals. The driller also should note the depths of changes in mud circulation and in water level. The upper 25 to 50 feet of the Dakota probably is interbedded with a relatively large amount of carbo- naceous shale, and hence the top of the Dakota may not be.readily recognized from rock cuttings and drill speed. The top of the Morrison probably will be more apparent, by recovery of varicolored-shale cuttings.