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-4- In order for the Division to approve the surface water monitoring plan described in the initial application on pages 780-109aaa and bbb, additional clarification was required. The following stipulation was necessary for permit approval and the requirement to submit an annual hydrologic report remains in place. Therefore, the original stipulation has been modified to the following: Stipulation No. Rl THE PERMITTEE IS REQUIRED TO SUBMIT TO THE DIVISION A YEARLY REPORT ON THE PROGRESS OF HYDROLOGIC MONITORING MHICH INCLUDES ALL DATA COLLECTED FOR THAT YEAR AND A DISCUSSION ON ANY CONCLUSIONS MHICH CAN BE DRAMN FROM THE DATA. The data submitted in Table 10 of the original permit application did not support the conclusion that coal dust does not affect water quality in the swamp adjacent to the tipple. In order to clarify this issue, the following stipulation was necessary: The applicant should re-analyze and resubmit the existing data in Table 10 to consider the effects of coal dust on water quality in the adfacent swamp, or alternatively the applicant should redesign the water monitoring program at the tipple to collect usable data. This information should be submitted to the Division no later than April 1, 1981. This stipulation has been resolved. Hydrologic data submitted during the previous permit term indicates that no significant effects to the surface water hydrologic system have been detected. This 1s priearlly due to the reduction in coal production from previously anticipated levels. This section 1s in compliance with ell appllcabTe requirements, with continued acceptance of the stipulations. YI. drol 1c Balance: Ground Water (2.04.5, 2.04.7, 2..05.3(4 ~~r.-a~ Kerr Coal Compard, to the original permit application, presented data concerning the grourM rater hydrology of the mine area. As part of the baseline hydrologic investigation, aquifer tests were performed on the Sudduth Coal seam and its underburden. Aquifer testing of the overburden was performed reported by Marren Hoffstra in a USGS Open File Report entitled 'Hydrology of the McCallu• StuQy Area'. The Sudduth Coal-seam had two pumping tests-run, one on a faulted area near Bush Draw and another on an unfaulted area. The peraeab111ty of the faulted area w s calculated to range between 16.5 gypd/ft2 and 25.4 gpd/ft2 to 4.0 ggpd/ft~. This permeability 1s sufficient to transmit and store water for limited beneficial use. and can be expected to yield fraa 10 to 40 gallons per minute.