2009-07-01_REPORT - C1980007 (6)

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West Elk Mine 2008 Annual Hydrology Report 11 • • Table 3. Summary of the Surface Water Monitoring Program o? Monitoring Station Monitored Area Flow Measurement Field WQ (pH, EC, T) Annual Lab Water Quality period of Record Sur ace Stations Upper N. Fork Drains a Basin Upper Deep Creek Up-gradient of SE mine panels Instantaneous, 3 x Year 3 x Year Peak Flow Period ") 1996 to present Lower Deep Creek Down-gradient of SE mine panels Instantaneous, 3 x Year 3 x Year Peak Flow Period(') 1996 to resent Upper Raven Gulch East of W. Flatiron Area Instantaneous, 3 x Year 3 x Year Peak Flow Period 'Z 005 to present Lower Raven Gulch East of W. Flatiron Area Instantaneous, 3 x Year 3 x Year Peak Flow Period 005 to resent Down-gradient of Box Canyon Box Canyon Panels Instantaneous, 3 x Year 3 x Year Peak Flow Period" 1999 to present North Fork Upper Up-gradient of mine facilities and Low Flow Period, Peak 3 (USGS 09132500)) mine discharge. Continuous 3 x Year ) Irrigation Season ( 1977 to present Up-gradient of mine surface Upper Sylvester Gulch facilities area and NE mine panels Instantaneous, 3 x Year 3 x Year Peak Flow Period(" 1977 to resent Down-gradient of mine water fiddle Sylvester Gulch discharge point and NE mine panels ontinuous 3 x Year Peak Flow Period (0 1977 to resent own-gradient of mine surface Lower Sylvester Gulch facilities area and NE mine panels Instantaneous, 3 x Year 3 x Year Peak Flow Period") 1977 to resent Surface Stations Lower N. Fork Drains a Basin own-gradient of mine facilities Low Flow Period, Peak orth Fork Lower and mine discharge. Instantaneous, 3 x Year 3 x Year Irrigation Season ' 1935 resent Lower Gribble Gulch ithin completed NW mine panel area Instantaneous, 3 x Year 3 x Year Peak Flow Period" 1977 to present Surface Stations Minnesota Creek Drains a Basin Up-gradient of un-mined SE coal Lick Creek Flume lease area Continuous 3 x Year Peak Flow Period 1977 to present Upper Dry Fork Flume South of the Divide Area Continuous 3 x Year Peak Flow Period (2) 1977 to present Middle Dry Fork Flume South of the Divide Area Continuous 3 x Year Peak Flow Period 1977 to resent Lower Dry Fork Flume own-gradient of SE mine panels and un-mined SE coal Continuous 3 x Year Peak Flow Period ' 1977 to present lease area Poison Gulch South of the Divide Area Instantaneous, 3 x Year 3 x Year Peak Flow Period 005 to present Deer Creek South of the Divide Area Instantaneous, 3 x Year 3 x Year Peak Flow Period (2) 005 to present Horse Gulch South of the Divide Area Instantaneous, 3 x Year 3 x Year Peak Flow Period(') 1977 to present East Gulch, East of Horse Gulch South of the Divide Area Instantaneous, 3 x Year 3 x Year Peak Flow Period ' 1977 to resent Up-Gradient of Dry Fork and west of un-mined SE coal lease Upper Minnesota Creek (USFS) area Continuous 3 x Year Peak Flow Period 1977 to resent own-gradient of Dry Fork, SE 1937-1947 and Lower Minnesota Creek (USGS) mine panels, and SOD area Continuous 3 x Year Peak Flow Period" 1985 to present Dee Creek Ditch Flume South of the Divide Area ontinuous 3 x Year Peak Flow Period (2) 006 to resent Minnesota Reservoir Flume South of the Divide Area Continuous 3 x Year Peak Flow Period "1 006 to present aseline starting in South Prong Creek' Mouth of South Prong Creek Instantaneous, 6 x Year 6 x Year Peak Flow Period(2) 2017 Stations listed upstream to downstream For sites with more than 5 years of data, lab parameters include TSS, TDS, Cond., PH, and Fe (dins & tot) For sites with 5 years or less data see Table 2 North Fork of the Gunnison and Middle Sylvester Gulch expanded parameters include those listed in Table 2 for surface water plus chromium, nickel, silver (total), cyanide (total), nitrite(as N), nitrate (as N), alkalinity (Total CaCO3), carbonate, hydroxide, and ortho-phosphate " S Prong Creek is not part of the current (WY 2008) monitoring program. June 2009 HydroGeo, Inc.