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4 • In the TEA !/CO-010-9-183 Seciton IV ld prepared by the BLM, there occurs a statement that Wyoming Fuels will avoid mining through all drainages. As this is not true, Wyoming Fuels must acquire written permission from the BLM to mine through the North Fork of Bolton Draw as shown on the mine plan of April 14, 1981. Main Bolton Draw The 55 acres of land historically flood irrigated (discussed on Page 110) should be shown on a map. The records of diversions of the Bolton Ditch, indicated in the Willard Owens Associates report, show that the ditch has been used as recently as 1976. This suggests that flood irrigation in Bolton Draw is conceivably a current agricultural practice. Is there any other additional information which can be provided to support the applicant's contention that Bolton Draw, as indicated on page 111, is generally not suitable fox growing cash crops? To the degree possible, the applicant should indicate how the 55 acres of historically irrigated land was used in the past. Information concerning the success of these practices should be provided, if the information is available. The applicant should quantify, to the degree possible, Che amount of available water which naturally originates within the basin, vs. Chat amount contributed by. irrigation return flow trom the trans-basin Spear ditch diversion. As stated on page 112, studies concerning subirrigation potential were limited only to the North Fork. To what degree is subirrigation of importance along Main Bolton Draw? All available information in the permit application indicates that the Main Bolton Draw is a probably AVF; information must therefore be provided to substantiate the existence and importance of alluvial ground-water in the main draw, especially from a subirrigation standpoint. Other indicators of sub irrigated conditions, including vegetation surveys and soil characteristics (mottling, rooting depths, etc.) should also be included if the information is available. To what extent could seepage from the sedimentation ponds impact the potential AVF along Bolton Draw? Assuming that the ponds contain water with an increased salt content (due to evaporation and storage of pit-inflow groundwaters) is it possible that salt-laden waters could migrate to the potential AVF via shallow groundwater flow? How would this affect the subirrigation potential of the Bolton Draw AVF? 2.10 Maps and Plans 2.10(2) Permit & Adjacent Areas The statement of map certification is not acceptable. All maps and drawings, which require professional engineer certification, must bear the seal and signature of a Registered Professional Engineer.