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<br />PROFESSIONAL ENGINEER'S CERTIFICATION <br />This certification covers the truck Turnaround Loop at the <br />Fish Creek Tipple (CMLRD Permit No. C-036-B1) required under rule <br />4.03.1(1)(d) of the Colorado Mined Land Reclamation Board. <br />The Turnaround Loop has been designed according to the <br />guidelines in IC8758, IISBM 1977. The design speed is 20 mph with <br />a minimum horizontal curve radius of 100 ft. Ditches and culverts <br />were designed to handle runoff from the 10 year 24 hour storm <br />event. There are no design parameters for the Turnaround Loop <br />in the Fish Creek Tipple Permit No. C-036-81 due to designation <br />by the CMLRD after construction that this section of the facili- <br />ties should be classified as a haul road. <br />The Turnaround Loop was upgraded in July, 1984 to reduce <br />grades, provide cross drainage and install a crushed stone surface. <br />In March, 1984, nuclear field density tests were performed by <br />Randall & Associates, Inc., during maintenance of the read to im- <br />prove compaction of some problem sections. The test results are <br />attached and confirm low compaction of the problem sections. <br />Vehicle traffic was used to compact these problem sections and <br />nuclear field density tests were performed by Randall & Associates, <br />Inc. in September, 1985. The test results are attached and confirm <br />that the density exceeds 95~ of AASHTO T-180 which is the normal <br />design requirement for haul roads. The plan location is shown <br /> on Map MR-1, Surface Support Facilities and Structures, and the <br /> profile and typical section is shown in Figure.21. <br />