Laserfiche WebLink
John H, Ferguson <br />PD Box 2030 <br />Durango, CO 81302 <br />(970)247-3448 <br />Jerry Sandell <br />Sil~erton CO 81433 <br />Subject: Storm Water Information for US Lime Monarch Quarry <br />Dear Jerry: <br />The following information is for application in the storm <br />water permit for the 19onarch Quarry. This area is that which runs <br />into the western edge of the pit. R substantial amount of the <br />area in question is partially drained along the course of the old <br />pit access road. This road is well constructed with frequent <br />water bars. In addition to the water bars there are several <br />drainage sumps where the runoff is caused to percolate into the <br />limestone. Rll the water in this small drainage is collected in a <br />sedimentation pond in the bottom of the disturbed area. <br />Rcreage of drainage: 125' <br />Vegetation Coverage: 307. Thin spruce and fir forestz <br />Hydrologic soil classification B ' <br />Rverage slope 267.` <br />5 year 24 hour precipitation event in tenth of an inch: 185 <br />Total precipitation in storm event: <br />125 Acres ?{ 1.8 in./12= 18.75 acre feet 18.75 acre ft = 816750 cu <br />ft. <br />Map furnished US Lime <br />' Cak:ulafed pholometricaly by map compilers <br />Monarch Quarry and Madonna Mine Soils information- Northern San Isabel Weslern Pike Nat. Forest <br />Soils and ecolological survey Draft <br />' Map compilers <br />` NOAA Atlas 2, Volume Ifl Prepared for US DA, Soil Conservation Service, Engineering Div. <br />