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<br />DIVISION OF MINERALS AND GEOLOGY <br />Depanmenl of Natural Resources <br />1 J 13 Sherman Sl., Room 215 <br />Denver, Colorado 80203 <br />Phone: 13031 86h~15h7 <br />FA%: (3031 032-0106 <br />July 10, 1996 <br />Mr. Mike Savage <br />Savage and Savage <br />464 West Sumac Court <br />Louisville, CO 80027 <br />Dear Mr. Savage: <br />iii iiiiiiiiiiiu iii <br />STATE OF COLORADO <br />II~~~ <br />DEPARTIv1EtJl' OF <br />NATURAL. <br />RESOURCES <br />Roy Romer <br />Gnvanor <br />dames 5. Lachhead <br />E.ecwrve Dneuw <br />Michael B Lang <br />Division Direc lur <br />After meeting last week, I reviewed your proposals for soil and vegetation work associated <br />with West Elk's possible expansion into Sylvester Gulch. The work outlined in your <br />proposals would appear to satisfy the regulatory requirements for baseline data and <br />vegetative reference areas. I have made some comments below which you might take into <br />consideration before you begin field work. <br />In regard to establishment of historic records, I would suggest we discuss some of the points <br />below prior to any additional work on your part. <br />BASELINE DATA COLLECTION <br />The soil mapping work should be done at the equivalent level of a first order soil survey <br />where soil boundaries are defined throughout their length. I am not sure how detailed the <br />Forest Service mapping for this area is, since I do not have that information in the office. <br />I would suggest mapping at a scale of 1:200, as you proposed for the vegetation mapping. <br />The vegetation sampling plan sounds adequate. It might be worthwhile to collect woody <br />plant density data in the riparian community if a seed mix and/or success standard for that <br />community need to be developed. I do not know the status of grazing in the study area. <br />Ideally, grazing exclosures should have been constructed during the season of sampling. If <br />the area is available for grazing, the impact of grazing should be evaluated in some manner. <br />Finally, the sample adequacy calculation in your proposal suggests using a Student's t value <br />for the 95% confidence level. The t values from atwo-tailed test at the 90% confidence <br />level would be adequate. <br />