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I I I I I I I I I I I I I I I I I I I that the repairs were only partially successful. Many iron-stained seeps occur over the entire length of the original concrete arch conduit, usually associated with cracks, construction joints, and porous concrete. Many of the seeps emerged from areas patched or grouted duri ng the 1986 repai rs. A detailed log of the outlet conduit inspection is provided in Appendix A. It was only possible to inspect the inside of the intake structure, which appeared to be in good condition except for a minor leak from the upper gate. The gates and operators appeared to be in satisfactory condition. The outlet works stilling basin is in good condition following the repairs. The only defect noted was minor spal1ing of the concrete in the floor slab. 1.4 Service Spillway The service spillway is located in a natural saddle about 200 yards to the 1 eft of the dam in the northwest corner of the reservoi r. The spi 11 way consists of a 25-foot wide concrete overflow weir at elevation 9087.0. The control structure is connected to a 12-foot long horizontal concrete apron at elevation 9076.0 by a 2H to 1V concrete chute. The concrete sidewalls on the crest and chute are 1-foot high, while the apron has 3-foot sidewalls. Spillway discharges enter a riprap-1ined channel which extends from the end of the concrete apron approximately 300 feet downstream to a 60-i nch di ameter cul vert whi ch passes the flow beneath Colorado H; ghway 14 into Joe I~ri ght Creek. The channel is roughly U-shaped, approximately 10 feet wide at the top and 4 feet deep. The concrete service spillway is in pOOl' condition. Several small cracks were observed in the crest, chute, and sidewalls for the apron. Apparently the unders1 ab drai nage provi ded duri ng or; gi na1 constructi on is inadequate, as seepage emerges through cracks in the lower portion of the chute and the apron sidewalls. Standing seepage water and debris obscured the apron floor slab. 1231 H -42-