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G-1 Hydrology <br />Map <br />Hayden Gravel Pit <br />DRMS Permit Number: M-1987-164 <br />United Companies <br />Mine Entry Location: Latitude. 4049780 LvngAude: -107-22120 <br />State. CO County: Routt Nearest Town: Hayden <br />Section: 11 Township: 6N Range: 87W PM: 6zh <br />Major -Watershed. Yampa River <br />Map Scale: 1,,: 700 <br />N <br />0 700 1400 <br />Map Georeferencing Information: Datum: NAD83 <br />Projection. CO NORTH <br />Survey Source: CO LIDAR Drawn by: EEL <br />Date: 04115124 <br />Imagery Source-.Google Checked by: EEL <br />Date: 04115124 <br />Survey Date. 2016 Approved by. EEL <br />Date: 04JIS124 <br />Imagery Date. 2013 <br />File Name: HGP-Maps 250501 <br />o <br />3375 West Powers Circle (303)-346-5196 <br />9 <br />jnfo@lewicki.bjz <br />Littleton. CO USA 80123 <br />STORMWATER CONTROL BERM <br />2 MIN. 3.0' <br />. . ....... �0 <br />Drainage Basin 1 <br />Site <br />Condition <br />Area (acres) <br />Curve <br />Number <br />1 00-YR 24-HR <br />Runoff (ac-ft) <br />Sump Capacity <br />(ac-ft)* <br />Base <br />78.4 <br />74 <br />4.5 <br />NIA <br />Mine <br />78.4 <br />82 <br />7.2 <br />11.30 <br />Rec. <br />1 78.41 <br />741 <br />4.51 <br />N/A <br />Drainage Basin 2 <br />Site <br />Condition <br />Area (acres) <br />Curve <br />Number <br />1 00-YR 24-HR <br />Runoff (ac-ft) <br />Sump Capacity <br />(ac-ft)* <br />Base <br />55.0 <br />74 <br />3.2 <br />NIA <br />Mine <br />55.0 <br />77 <br />3.8 <br />7.6 <br />Rec. <br />55.0 <br />74 <br />3.2 <br />N/A <br />*Volume available within pit behind SCM berm. <br />Drainage Basin 3 <br />Site <br />Condition <br />Area (acres) <br />Curve <br />Number <br />100-YR 24-HR <br />Runoff (ac-ft) <br />Sump Capacity <br />(ac-ft) <br />Base <br />87.0 <br />74 <br />5.1 <br />N/A <br />Mine <br />87.0 <br />74 <br />5.1 <br />N/A <br />Rec. <br />87.0 <br />74 <br />5.1 <br />NIA <br />BOUNDARIES <br />DRK4S Permit Boundary <br />ROADS AND RELATED FEATURES <br />Highway <br />Light duty road, paved <br />DRAINAGE DATA <br />Basin 1 Basin <br />62.6 80 Destination <br />Area Composite <br />(acres) Curve Number <br />Drainage Direction <br />Drainage Basin <br />MINING POD CONTOURS <br />Index (k1ining) <br />Intermediate (Mining) <br />Index (Reclaimed) <br />Intermediate (Reclaimed.) <br />