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Hubbe rson Gulch / Dry Creek . <br />- Surface Water Site SW-S2W-SG9 (WSN9). This tlubberaon 411th site is upstream of mine <br />related discharges at the proposed II-W South Expansion area. 2t is not part of the <br />required monitoring program. Monr CO ring at this site began in August 1997. Data is <br />provided here to supplement those data previously submitted as part of that permit <br />revision. No monitoring vas performed in the 1999 calendar yaaz. <br />- Surface Water Site SW-SZW-SG17 (WSH17). This tlubberaon Gulch site exists at the site oP <br />the proposed NPDES 017 pond in the II-W South Expansion area. It is not part of the <br />required monitoring program. Monitoring at this site began in August 1997. Data rs <br />provided here to supplement thoaa data previovsly submitted an part of that permit <br />revision. No monitoring vas performed in the 1999 calendar yaaz. <br />- Surface Water Site SW-52W-SG16 (WSH16). This tlubberson 411th tributary site exists at <br />the site of the proposed NPDES 016 pond in the II-W South Expansion area. It is not pazt <br />of the required monitoring program. Moni toranq at this aita began in August 1997. Data <br />is provided here to supplement thoa¢ data previously submitted as pazt of that permit • <br />revision. No monitoring vas performed in the 1999 calendar yaaz. <br />- Surface Water Site 3W-52w-SG7 (WSN7). This site is located on Hubberson Gulch upstream <br />o£ the confluence of vane diachargea contained in 006 Gulch. Monitoring here began in <br />April 1987. Ravier of its hydrograph ahors typical aaaaonal variation due to anorpa<k <br />runoff in the spring. The peak £lor this yoaz vas loraz than that obeerv¢d in the prior <br />four years. Ire TDS plot indicates a nearly level trend. <br />- NPDE9 006 (NPDES6). This site is located on a tributary to Hubherson Gulch referzad to <br />as the 006 Gulch. Construction of the 006 Pond ras completed October 1989. This pond <br />collects all mine dischazgea from the current south mining azea. Tha first hydrograph <br />supplied shore data far this yaaz; the second ahors all data collected since the site <br />began diachazging. Raviev of the flow hydrogzaphe indicates typical seasonal variation <br />due to enormelt runoff in the spring, with additional peaks due to pit pumpage, pond <br />clean-out, and zainfall events. The rater year average floes (Prom weekly measuraamnta) <br />since this pond began to discharge aze: <br />• <br />~2 <br />