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The Leadville Mill M1990-057 <br /> TABLE OF CONTENTS <br /> the east by the Leadville Sanitation District facility and on the north, west and south <br /> by lands zoned Industrial/Mining (IM). Twe Fesidences aFe 400 8004 west f the <br /> preperty. Man-made structures within 200ft of the permit boundary include: <br /> • Gas pipeline (Xcel Energy); <br /> • Utility power lines (48kV) (Xcel Energy); <br /> • Sewer pipeline (Leadville Sanitation District); <br /> • 2 roads (access to Benson, Fowler, Wood, and Phillips properties); <br /> • Benson residence; <br /> • Concrete structure (Phillips property); and <br /> • Polishing pond and perimeter fence-between Mill and Sanitation Facility <br /> property boundary (Leadville Sanitation District). <br /> The man-made structures are identified on Figure 6-2, Leadville Mill Site Specific <br /> location and structure compensation agreements and an engineering report are <br /> presented in Sec. 13.0, Exhibit L. <br /> There are two distinct topographical features describing the Mill property. The <br /> northern portion of the property consists of a moderately steep, south-facing slope, <br /> draining to the south. The average grade of this slope is 25% and ranges in elevation <br /> from 9,760ft to 9,730ft. The southern portion of the property consists of a gently <br /> sloping area that drains toward the west-southwest. The average channel grade of the <br /> ^utheFn sle-p is 3% and the slope on the southern portion of the property ranges <br /> from 9,730ft to 9,700ft at the southwest property corner. <br /> An unnamed 1-3ft wide drainage channel enters the property on the eastern <br /> boundary, adjacent to the northwest corner of the Leadville Sanitation District <br /> polishing pond. This channel geeeFaGly flows to the southwest across the property, <br /> crossing under two access roads. The channel flows into what appears to be an old <br /> soil conservation drainage ditch in the southwest corner of the property and the water <br /> then flows along the eente F to the northwest to the southwest, exiting the property <br /> on the western boundary. Undisturbed area runoff water to the North of the unnamed <br /> drainage channel reports to the channel. The flews are limited and the ,ulv is , ndeF <br /> its the ^ eFty onto aR existiFig . ad drainage netwed( 12-inch CMP culverts are <br /> designed to convey a 10-year 24-hour storm event. Water exits the property into an <br /> existing road drainage network flowing to the Highway 24 drainage network and then <br /> to California Gulch. <br /> Version 3 December 2020 1-3 <br />