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outfall on upper Hubberson Gulch, and Pond 016 and 006 outfalls on Hubberson <br />Gulch tributaries. <br />SG9 is located upstream from Pond 017, and above any mine related discharges in <br />the south extension area. Monitoring was conducted from 1997 through 1998, and <br />reinitiated in 2000, with monitoring conducted June and September. <br />SG7 (upstream of 006 Gulch confluence and downstream of 016 Gulch confluence) <br />is monitored monthly for flow and field parameters, and triannually for the <br />parameters noted in Appendix 15-1 of the permit application package. The total <br />dissolved solids (TDS) plot provided for this site in the 2003 AHR indicates an <br />increasing trend. The PHC predicts an irrigation season average TDS value of <br />1787 mg/1. For 2003, the observed value was 1110 mg/1. <br />FGl (Hubberson Gulch downstream of 006 Gulch confluence) is equipped with a <br />continuous flow recorder and water quality samples are obtained triannually for the <br />parameters listed in Appendix 15-1. The TDS plot in the 2003 AHR indicates an <br />increasing trend. The PHC predicts an irrigation season average TDS value of <br />2193 mg/1 for this site, while a value of 1480 mg/1 was reported in the 2003 AHR. <br />SG9, SG16 and SG17 were added to the monitoring program within PR-02. SG16 <br />and SG17 were the baseline sites for Ponds 016 and 017, respectively. These sites <br />have been replaced by Colorado Discharge Permit System (NPDES) monitoring <br />sites located at the Pond 016 and 017 outfalls. <br />Dry Creek <br />One site is monitored on Dty Creek,, downstream of mining (SGS). Flow and field <br />parameters are measured monthly, and water quality samples for the parameters <br />listed in Appendix 15-1 are taken triannually. The TDS plot included in the 2003 <br />AHR indicates an increasing trend. The Seneca II-W PHC predicts an average <br />irrigation season TDS value of 2451 mg/1 at this site, while a value of 1825 mg/l <br />was observed in 2003. The ephemeral drainage tributary to Dry Creek, which <br />drains the "D" Pit reclamation area in the northern portion of the original permit <br />area, is monitored at the Pond 005 outfall NPDES site. <br />Sage Creek <br />SCC monitors one NPDES site on Sage Creek, at the Pond 009 outfall. Flow and <br />field parameters are recorded monthly upstream, and triannual samples are taken <br />for the parameters listed in Appendix 15-1. In addition, SCC monitors an NPDES <br />site at the Pond 015 outfall, located on a south tributary of Sage Creek. <br />Seneca Coal Company has installed a sediment control system to divert, convey <br />and/or treat surface water runoff in and around the mine site. The sediment control <br />Seneca II-W Findings Document 40 June 12, 2006 <br />Permit Renewal No. 5 <br />