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~. ' Mr. E. Peter Matthies - 2 - April 16, 1991 More information will be required on the haulage route into the loadout site. Is the road labeled "Haul Road" on Figure 4.2-4 a public road? If not, width, gradient, and surfacing information for the portion to be traveled by haul trucks is needed pursuant to Rule 2.05.3(3)(c1(il. Similar data must be provided for parts of the gravel pad leading to the coal storage pile. Drainage system designs fora 10-year 24-hour runoff (4.03.1(4)1 and surfacing information (4.03.1(51) must also be provided. The surface water calculations indicate that all structures as designed should meet the design criteria, however several items of information are missing. An engineering drawing of the pond design must be provided and must be certified by a registered professional engineer (Rule 2.05.3(4)(a)(i)(A)1. A map or maps must also be provided showing locations of all surface water control structures. In addition, the runoff calculations were handwritten and difficult to follow, and more legible calculations would be useful for the permanent record on this site. The section on Protection of the Hydrologic Balance should be expanded to include a discussion of the water rights information requested above, based on the proximity of established water users to the loadout site. Additional information concerning possible impacts of the proposed loadout facility on alluvial valley floors in the vicinity is required. Irrigated land should be mapped on Figure 5.1-1, and water sources should be listed if available. Any available water quality data on surface water and alluvial ground water from the area of the operation would be very useful, as would the water rights listing mentioned above. The Division also requests a more detailed topographic map which clearly shows the relationship of the loadout site to the Colorado River alluvium. Figure 5.1-1 has a 40-foot contour interval, which is too large to determine the relationship, while the topographic information in Figure 4.2-3 does not extend beyond the industrial site itself. The map should indicate the flow oath of discharges from the existing settling pond and the proposed sediment pond. The Division is attempting to review this application as quickly as possible, as you requested. Please call me if clarification is needed on any of these questions. Sin erely, ~~~~ ~ ~~ William B. Crick Reclamation Specialist WBC/ern Enclosure(s) CC: Mike Savage, MLRD Steve Renner, MLRD Mike Galloway. Adrian Brown Consultants 4923E