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Exhibit 71 Hydrologic Characterization South of the Divide Area and Monitoring Plan 19 <br />4.3.1.5 Raven Gulch <br />Raven Gulch is a perennial stream that drains the east side of the West Flatiron Tract. The Upper Raven <br />Gulch monitoring station is a new site, established in 2005, and is located upstream at the confluence with <br />the West Flatiron drainage. The Lower Raven Gulch monitoring station is also a new site (2005) and is <br />located at the mouth of Raven Gulch neaz its confluence with the North Fork of the Gunnison Rivet The <br />locations of these monitoring sites are depicted on Map I. Routine monitoring of the Upper and Lower <br />Raven Gulch monitoring stations began in May 2005. <br />4.3.2 Lower North Fork Drainage Basin Surface Water Monitoring Stations <br />4.3.2.7 North Fork Lower <br />The North Fork Lower monitoring station monitors the North Fork of the Gunnison River down-gradient <br />of the WEM facilities area and mine discharge points (Map 1). <br />4.31.2 Lower Gribble Gulch <br />Gribble Gulch is an ephemeral stream that flows only in response to storm events and spring runoff. This <br />stream drainage drains the western WEM panel azea. The Lower Gribble Gulch station is located west of <br />the WEM (Map 1) and was established to monitor the effects of mining in the west and northwest mine <br />panel azea. <br />4.3.3 Minnesota Creek Drainage Basin Surface Water Monitoring Stations <br />4.3.3.1 Lick Creek Flume <br />Lick Creek is an ephemeral stream that is tributary to Upper Minnesota Creek and flows only in response <br />to storm events and spring runoff. The Lick Creek drainage drains the southern part of the SOD coal <br />lease area (Map 1). This monitoring station was established in 1977 when MCC was planning to develop <br />this tract. The site was also established as part of the Minnesota Creek Water Augmentation Plan (W WE, <br />1986). <br />4.3.3.2 Drv Fork <br />Dry Fork is a tributary stream to middle Minnesota Creek. The Dry Fork drainage drains the northern <br />portion of the SOD azea and the area south of the SE mine panel's area adjacent to mine Panels 12 and 13 <br />(Map 1). There aze three monitoring stations in the Dry Fork drainage: Upper, Middle and Lower Dry <br />Fork (Map 1). These stations were established to monitor the effects of mining along the drainage and to <br />support the Minnesota Creek Augmentation Plan. Upper Dry Fork Flume was relocated in the fall of <br />2005. MCC will initiate baseline monitoring of this site in the 2006 and routine monitoring will begin in <br />2007 (Table 7). <br /> <br />Apri12006 AydraGeo, lne <br />