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" . . Without the Empire Reservoir Exchange Ac. Ft. with Two Ac. Ft. wi th Narrows only Total annual water supply 117,200 85,000 $44,426,000 $38,334,000 Total cost Service area Riverside, all ditches between and North Sterling Shortages remaining in above service area 15,800 acre-feet, instead of 124,600 acre-feet as at present. Without Empire Exchange and without North Sterling Pump Ac. Ft. with One (Ri verside) Ac. Ft. with Narrows only Total annual water supply 85,000 85,000 $40,319,000 $38,334,000 Total cost Service area RiVerside, all ditches to and including North Sterling Shortages remaining in above service area 44,300 acre-feet, instead of the 124,600 acre-feet as at present. The total cost of a project including all three innovations $44,426,000. Such a project would furnish 117,200 acre-feet of water at the present time level. The Weld County Reservoir would cost $45,459,000 and furnish 85,000 acre-feet of water. Retardation of the winter flows diverted by the North Sterling pump would noticeably increase summer flows downstream. Turning now to the fourth investigation, conducted since our last meeting, we have drilled 7 holes in the Weld County dam site area: 3 holes on the site estimated by the Bureau, and 4 holes on the al ternate s.i te suggested b,y Cecil Osborne l,lf miles downstream. On the original Bureau site we found the greatest depth to shale to be 85 feet below the river level and. on the alternate site to be 100 feet below river level. The material encountered above the shale is quite porous as expected. Since conditions are at least as bad as anticipated orig1.nally, there appears to be no reason to change our estimates of cost for this site. Leakage under the dam will probably be Gomewhat greater than we expected. 5