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<br />Payton and Brendecke (1985) analyzed records of two precipitation <br />stations in the Boulder Creek watershed. These two sites are south of <br /> <br /> <br />Estes Park, at elevations of 9,900 feet (3,018 meters) and 12,280 feet <br /> <br /> <br />(3,743 meters) and have record lengths of 21 and 18 years. They found <br /> <br /> <br />rainfall intensities to decrease with elevation. The data were fitted to <br /> <br /> <br />an exponential probability distribution and, using the PMP value of 10 <br /> <br /> <br />inches (254 millimeters) for 6 hours for these sites reported by Miller <br /> <br /> <br />et al. (1984), estimated the return period to be much greater than 10,000 <br /> <br /> <br />years. Although this type of extrapolation, based on short-term data, may <br /> <br /> <br />not be justified, it does demonstrate the controversy surrounding PMP <br /> <br /> <br />values at this elevation. <br /> <br />/9 <br />