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• • iii iiiiiiiiiiiiiiii 999 I N T E R MEMO O F F I C E To: Bill Carter From: Susan Burgmaier Subject: Bowie No. 1 Mine (C-81-038) -Annual Reports Date: November 6, 1997 1 have completed my review of the 1996 Annual Hydrology, Subsidence, and Mine Inflow reports for [he Bowie No. I Mine prepared by Bowie Resources, Ltd. (BRL). [reviewed the surface water portion of the hydrology report in great detail, for both compliance with the monitoring plan and the effects, if any, of the mine on the hydrologic balance. 1 reviewed the groundwater section of the hydrology report and the subsidence and mine inflow reports for compliance with the approved monitoring plan, and a general review of the data. I did not see any data which caused alarm, unless noted below. I also did a general review of the ] 995 subsidence report, as I understand this was not yet done. Annual HKdrology Report The probable hydrologic consequences (PHC) section of the permit application states that the mine has potential to increase the sediment load of surface waters adjacent to disturbed areas, but predicts that the sediment ponds treating disturbed area runoff will adequately reduce sediment load prior to release off-site. Streams within and adjacent to the permit area are not expected to be adversely impacted by subsidence; Steven's Gulch and East Roatcap will be protected under the approved subsidence control plans. The PHC further states, regarding groundwater, that no groundwater impacts area anticipated within the mine site, due to a lack of groundwater resources. No regional groundwater impact is expected from subsidence, and any significant change in groundwater quality is expected to be negated by dilution. 1 based by review on a comparison of the PHC and monitoring data to date. The data I reviewed from surface water monitoring supports the PHC predictions. Following are my comments which can be forwarded to the operator. The following required data are missing from the 1996 Annual Hydrology Report. a. All required data for ponds 14-1 and 14-2 (quarterly flow/water level and field parameters, annual full suite analysis). The operator .vas reportedly unable to locate these two monitoring points during on attempt in November. b. All data for the first three quarters at pond 14-3; the site was visited in November only, the requirement is quarterly field parameters and an annual full suite analysis.