Laserfiche WebLink
<br /> <br />Applicability of the Probable Maximum Precipitation (I'MP) <br />' Portion of the Study Titled "Site-Specific Meteorological and <br />Hydrological Study of the Williams Fork Drainage Basin" for the <br />Henderson Mill Tailing Pond Drainage Basin <br />' Background <br />' Applied Weather Associates has reviewed the report titled "Site-Specific Meteorological and <br />Hydrological Study of the Williams Fork Drainage Basin" for application to the Hend~;rson Mill <br />' tailing pond drainage basin. The review was conducted by Dr Ed Tomlinson who wa:; the project <br />manager and principle investigator for the Williams Fork study. Although the Williams Fork <br />' study included hydrological computations along with the PMP analysis, only the PMP portion of <br />the study was reviewed for application to the Henderson Mill location. <br />Basin Location <br />The Williams Fork River drainage basin is located approximately 70 miles west-northwest of <br />Denver, Colorado. The basin is approximately 230 squaze miles and is relatively regullar in shape, <br />' about 25 miles long and eight miles wide. The basin ranges from about 7,800 feet in Elevation at <br />the Williams Fork dam to over 13,500 feet along the Continental Divide, the eastern boundary of <br />' the drainage basin. Figure 1 shows the location of the Williams Fork basin west of the <br />Continental Divide. <br />' The Henderson Mill tailing pond drainage basin lies entirely within the Williams Fork drainage <br />basin on the northeast slopes of the Williams Fork Range, approximately equal distance between <br />the top of the Williams Fork River drainage basin to the southeast and the Williams Fork <br />Reservoir to the northwest. The top of the Henderson Mill drainage is approximately 10,000 feet <br />' with the tailing pond having an elevation of approximately 9,600 feet. The basin drains basically <br />from southwest to northeast. Figure 2 shows the basin and major sub-basins within tl~e Williams <br />Fork watershed. <br />1 <br />Page 1 <br /> <br />