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TABLE 3 (Cont. ) <br /> Spillway Data Summary <br /> Sediment Pond 002 <br /> Orifice Coef. . . . . 0.600 <br /> Manning Coef. 0.025 <br /> Inlet Elevation. . 5700. 10 <br /> 25-year, 24-hour Peak <br /> Stage. . . . . . . . . 5700.75 <br /> The entrance to the emergency spillway is located more than three (3) <br /> feet above the principal spillway. There will be no flow through the <br /> emergency spillway inlet as a result of the runoff from a 10-year, <br /> 24-hour precipitation event or less. The peak stage of the 25-year, <br /> 24-hour storm event (Elev. 5700.75) is approximately 2.5 feet below the <br /> top of the embankment. The emergency spillway is capable of passing the <br /> runoff from the 100-year, 24-hour storm event with approximately two <br /> feet of freeboard to ensure no overtopping of the embankment. <br /> Construction Summary <br /> In accordance with Rule 4, Part 4.05.6(7) of the Rules and Regulations <br /> of the Colorado Mined Land Reclamation Board pursuant to the Colorado <br /> Surface Coal Mining Reclamation Act 34-33-101 et seq. , I , James Gary <br /> Schlenvogt, hereby certify that the construction of Sedimentation Pond <br /> 002 was inspected and constructed under my superivision. From October <br /> 21 until November 4, 1987 during construction, I was on site to inspect <br /> and supervise construction of this structure. I , James Gary Schlenvogt, <br /> am a 1975 graduate in civil engineering and I have been a Registered <br /> Professional Engineer in Colorado since October 17, 1980. <br /> The purpose of my inspection and certification was to ensure proper <br /> construction of Sedimentation Pond 002 and to satisfy the requirements <br /> of Rule 4.05.6(7) of the Colorado Mined Land Reclamation Division. The <br /> material was placed in the embankment to meet or exceed the design <br /> specifications. The compaction tests exceeded the design <br /> specifications. This as-built report confirms the construction of this <br /> structure meets or exceeds the Rules and Regulations of the Colorado <br /> Mined Land Reclamation Division. The structure is stable, evidencing no <br /> indications of slope instability. <br /> 6 <br />