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M =total number of sample elements that which exist within each primary unit • <br />~ m =number of primary unit elements actually sampled in each primary unit <br />Confidence limits for comparisons to reference areas were calculated using the formula 'for <br />Post-mining Comparisons on page 17 of CMLRB (1988), using an estirciated t-value of 1.65. <br />~ Confidence limits for areas not being compared to a reference area (i.e. shrub density), were <br />calculated as 1.65 standard errors of the mean, i.e.: <br />s <br />cont. interval = 1.65 <br />Jn <br />Climatic Data <br />'I Precipitation data from the Seneca II Mine for the period of January 1982 through July 1993 <br />~ were provided by SCC. Since the long-term average for the mine exists for only 10 years, the <br />long term average monthly precipitation data from the National Oceanic and Atmospheric <br />Administration (NOAA) for the nearby town of Hayden was used as an appropriate base for <br />~~ comparison. Information on degree-days was also derived from the NOAA records at Hayden. <br />it (temperature data for Hayden were not, at the time of writing, officially published; they were • <br />provided in unofficial form by the Colorado Climate Data Center at Colorado Slate University in <br />Fort Collins). <br />8 • <br />