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Colowyo, C1981-019, PR3 adequacy <br />February 25, 2011 <br />3. It was not stated in the text whether the Collom expansion area has a mining history. Please <br />include a statement indicating any mining history and include the details requested in Rule <br />2.04.3(3)(a-f) if there is a history of mining in the proposed disturbance area. <br />Rule 2.04.5 General Description of Hydrology and Geology <br />The application is adequate with regard to this Rule. <br />Rule 2.04.7 Hydrology Description <br />In Table 2.04.7-45, some of the data may be in error. For the stream flow data, some of the <br />dates are consistent with data on the USGS web site, but some are not. For example, the web <br />site indicates peak flow data from 1904 to 2009 for site 9251000 (Yampa River near Maybell), <br />but the table in the application has different dates. Another example is site 9250700 (Morgan <br />Gulch) as the wrong year is listed in the table; it should be 1980 not 1981. Please check this <br />data and correct as necessary. <br />2. Spring V25 is described as being in Collom Gulch but is shown in Little Collom Gulch. Please <br />review and correct as necessary. <br />3. Table 2.04.7-44 lists registered wells in the proposed permit and adjacent area. Map 11B <br />shows all drill holes and wells in the permit and adjacent area, with the wells identified by the <br />well permit number listed in the table. Many inaccuracies were noted, however, including <br />wells not on the map, or not on the map in the location as stated in the table, as noted below: <br />• #2231 Elton not shown on Map 11B <br />• #175219 Dudek not on Map 1113 <br />• #81006 Avgares Deno not on Map 1113 <br />• #211362 Ricks not on Map I IB <br />• #237612 Plumb not on MapI IB. <br />Please correct the map and/or the table to accurately identify all wells not owned by Colowyo <br />or affiliates of Colowyo. The Division suggests creating a second map showing only wells <br />(drill holes excluded) and clearly indicating those wells not owned by Colowyo. Many of these <br />wells owned by others are in close proximity to proposed operations in Collom. Please see <br />Rule 2.04.7(1)(a)(iv) and (b) for specific well information requirements. <br />Rule 2.04.7(1) Groundwater Information <br />1. Please add a notation to Table 2.04.7-42 explaining the meaning of the abbreviation "ND".