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JAN-20-99 WED 10125 AM DMG DURANGO FIELD OFFICE <br />'' it ~,I,'4~ <br />~__ --- -~ <br />ALAN O. COX <br />CDAFOMTf MANpOFq~ FNYIgONMENTAL AFFAIRS <br />FAX N0. 97~ 7+5104 P. 02 <br />' Receive ~~'~~ <br />~~~~ C <br />'~A~I 19 79gy <br />January $, 1999 <br />State of Colorado <br />Division of Minerals and Geology <br />Durango Field Office <br />Q84 Turner Drive, Suite F101 <br />Durango, CO 81301.7910 <br />'~(on of~,re~e~ O!-ice <br />ass a cat,lagr <br />CERTIFIED MAIL -RETURN RECEIPT flEQUESTED P 298 872 175 <br />Attit: Mr. Steve S. Shuey, Reclamation Specialist <br />R£: Bulldog Mine Reclamation Protect <br />Infiltration Treneh Monitorino <br />December, 1998 Monthlv Reoart <br />Dear Mr. Shuey: <br />Pursuant to the Technical Revision to the Reclamation Permit for the Bulldog Reclamation Project <br />pertaining to installation and operation of an infiltration trench to accommodate seepage from the 9360 <br />edit, altaclLed is a copy of the monthly monitoring data and associated water quality analyses. This is <br />the fourteenth monthly report as required under the approved TR. <br />We continue to control and manage seepage water emanating from the edit. Seepage flows were <br />directed into the infiltration trench at all times. Flow rates directed to the infiltration trench werr, below <br />lire 30 gpm threshold, as noted in the attached summary table. Trench performance continues to meet <br />or exceed expectations. The two (21 vadose zone piezometers adjacent to the infiltration trench were <br />monitored per the Technical Revision conditions. Vadose zone water was not detected in the <br />piezometers nor was there evidence of surface water in the vicinity of the trench. Vadose zone <br />piezometer monitoring data is attached wish other monitoring data for the trench and edit flows. One <br />water quality sample (12.98 Trench Inletl was [aken during the report period on December 4, 1998. <br />Analytical data are attached. <br />In addition, as part of this monthly report and in accordance with the 9360 Level Adit Grosure Monitoring <br />Plait, dated April 1998, Windy Gulch monitoring was continued during this period. Onc water quality <br />sample 112-98 WGL Weir) was taken on December 4, 1998. Analytical data are attached. Minimal flow <br />was observed due to frozen conditions at the weir at the limo of sampling. A visual estimate of less than <br />5 gpm through the existing weir was made at this time. <br />Thank you for your limo and attention on this matter. If you have any questions, please contact me in <br />the San Francisco office. <br />Very Truly Yours, <br />cc: R. Callan, Grants <br />F. Martinez, Alamosa BLM <br />Flotmer, Colorado WOCD, Denver <br />HOMESTAKE MINING COMPANY I' Denver <br />854 CALIFORNIA gtgEET. SAN FPANp;fn•CA ~IOB~7~GE (~15)De M1LI50 <br />