2012-07-02_REPORT - C1980007 (3)

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Monitoring Station fD Monitored Area Flow Measurement Field WQ (pH, EC, T) Annual Lab Water Quality Period of Record Surface Stations Upper N Fork Drainage Basin Upper Deep Creek Up- gradient of SE longwall panels Instantaneous, 3 x Year 3 x Year Peak Flow Period "' 1996 to present Lower Deep Creek Down - gradient of SE longwall panels Instantaneous, 3 x Year 3 x Year Peak Flow Period "' 1996 to present Upper Raven Gulch East of W Flatiron Area Instantaneous, 3 x Year 3 x Year Peak Flow Period ") 2005 to present Lower Raven Gulch East of W Flatiron Area Instantaneous, 3 x Year 3 x Year Peak Flow Period "' 2005 to present Box Canyon Down - gradient of Box Canyon Panels Instantaneous, 3 x Year 3 x Year Peak Flow Period (1) 1999 to present North Fork Upper (USGS 09132500)) Up- gradient of mine facilities and mine discharge Continuous 3 x Year Low Flow Period, Peak Irrigation Season "' 1977 to present Upper Sylvester Gulch Up- gradient of mine surface facilities area and NE mine panels instantaneous, 3 x Year 3 x Year Peak Flow Period "' 1977 to present Middle Sylvester Gulch Down - gradient of mine water discharge point and NE mine panels Continuous 3 x Year Peak Flow Period j3) 1977 to present Lower Sylvester Gulch Down - gradient of mine surface facilities area and NE mine panels Not Measured 3 x Year Peak Flow Period (I) 1977 to present Surface Stations Lower N. Fork Drainage Basin North Fork Lower Down - gradient of mine facilities and mine discharge Not Measured 3 x Year Low Flow Period, Peak irrigation Season "' 1935- present Lower Grabble Gulch Within completed NW mine panel area Instantaneous, 3 x Year 3 x Year Peak Flow Period'" 1977 to present Surface Stations Minnesota Creek Drainage Basin Lick Creek Flume Up- gradient of un -mined SE coal 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 "' —1977 to present Middle Dry Fork Flume South of the Divide Area Continuous 3 x Year Peak Flow Period "' 1977 to present Lower Dry Fork Flume Down - gradient of SE mine panels and un -mined SE coal lease area Continuous 3 x Year Peak Flow Period "' 1977 to present Poison Gulch South of the Divide Area instantaneous, 3 x Year 3 x Year Peak Flow Period "' 2005 to present Deer Creek South of the Divide Area Instantaneous, 3 x Year 3 x Year Peak Flow Period "' 2005 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 present Upper Minnesota Creek (USFS) Up- Gradient of Dry Fork and west of un -mined SE coal lease area Continuous 3 x Year Peak Flow Period "' 1977 to present Lower Minnesota Creek (USGS) Down - gradient of Dry Fork, SE longwall panels, and SOD area Continuous 3 x Year Peak Flow Period "' 1937 -1947 and 1985 to present Deep Creek Ditch Flume South of the Divide Area Continuous 3 x Year Peak Flow Period "' 2006 to present Minnesota Reservoir Flume South of the Divide Area Continuous 3 x Year Peak Flow Period (1) 2006 to present South Prong Creek' Mouth of South Prong Creek Instantaneous, 6 x Year 6 x Year Peak Flow Period ' Baseline will start in —2017 West Elk Mine 2011 Annual Hydrology Report Table 3. Summary of the Surface Water Monitoring Program Stations listed upstream to downstream " For sites with more than 5 years of data, lab parameters include TSS, TDS, Cond , pH, and Fe (diss & tot) 2) 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 CaCO,), carbonate, hydroxide, and ortho - phosphate J) S Prong Creek is not part of the current (WY 201 1) monitoring program June 2012 13 HydroGeo, Inc.