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GREYSTONE ®DAM SAFETY INSPECTION WORKSHEET <br />(Reference: Dam Safety Manual, State Engineer's Office, State of Colorado. Review this <br />manual for inspection techniques prior to making an inspection. Much of the information <br />required is already entered on this worksheet. Underlined areas and the table require <br />additional entries based on your findings.) <br />Operator: SLURCO CORPORATION <br />Facility: Canadian Mine, C-81-026 <br />Date of Inspection: i =~:3 % s 9 C. <br />Weather: C/-~„ ,-_ ~ <br />Pond Identification and Use: Pond Number 002, formerly sedimentation, currently <br />livestock and wildlife. <br />Type of Dam, Spillways: Earthfill. Primary spillway: Corrugated Metal Pipe riser <br />(24"), with weep holes. 6 each 3"-diameter, at 1~" and <br />23.5' below the top. Emergency spillway: Open <br />trapezoidal with riprap. <br />Estimated Actual (Maximum) Capacity: 9.5 acre feet <br />Estimated Surface Area: This is the :~ ~~t ..----L. <br />surface area of the standing water at the <br />time of the inspection. From the water <br />elevation determined below, use the <br />following table to make the estimate: <br />8224.1 (emergency spillway) 3.55 acre <br />8222.3 (top of riser)..... 2.87 acre <br />8221.05 (upper weep holes) 2.35 acre <br />8220.3 (lower row of holes) 2.12 acre~~ ,~; ~ i 2 . ~.' <br />8218 ..................... 1.34 acre <br />8216.9 (bottom of riser).. 0.69 acre <br />8216 (upstream toe of dam) 0.25 acre <br />8215.6 (bottom of pond) .. 0.00 acre <br />Pond 002, Page 1 of 5 <br />