Art Grguric, Backleggs Creek Watershed Association, Operations and Maintenance Panel
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Transcript of Art Grguric, Backleggs Creek Watershed Association, Operations and Maintenance Panel
![Page 1: Art Grguric, Backleggs Creek Watershed Association, Operations and Maintenance Panel](https://reader037.fdocuments.in/reader037/viewer/2022110119/55572f3bd8b42a067f8b50b9/html5/thumbnails/1.jpg)
Blackleggs CreekBig Run AMD
Treatment Complex
Indiana County, PA
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Big Run AMD Treatment Complex
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Big Run #2
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Big Run #2 Intake Valve
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Big Run #2 Limstone Bed Piping
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Big Run #2 Settling Wetland
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Big Run #2 Iron Coating of Limestone
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Big Run #2 Limestone Washing and Replacing
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Big Run #2 OM&R
• System is too small for flow requires constant adjustment of boards in drop boxes
• Requires regular flushing• Predicted dissolution and coating of stone• Plugging of holes in pipes – now using chain-sawed
slats rather than drilled holes• Uncooperative Landowner – during high flow, 10-20%
flow goes untreated• Fear that during high flow a siphon is created• Erosion in Overflow channel
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Big Run #7
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Big Run #7 Mine Water Capture
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Big Run #7 Pipe Labyrinth
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Big Run #7 Drop Boxes
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Big Run #7 OM&R
• Cleaning Debris around mine opening• Cleaning Stone• Flushing• Cleaning and replacing stone• Clogging pipes
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Big Run #7A Mine Blowout
#7A #8
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Big Run #7A Mine Blowout
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Big Run #7A Incidental Coal Extraction
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Big Run #7, #7A, and #8 Combined
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Discharges of Big Run #7A and #8
#7A #8
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Big Run #8 Construction Logistics
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Big Run #8 Drilling to Locate Mine Portal
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Big Run #8 Partial Construction to Protect Against Possible Mine Blowout
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Big Run #8 Construction Challenges
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Big Run #8 COG and Robot Exploration
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Big Run #8 Mine Water Capture
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Big Run #8 Mine Water Inflow Management
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Big Run #8 Completed System
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Big Run #7, #7A, and #8 Combined
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Big Run #8 OM&R
• Ponds too small to treat the flow and iron levels due to space constraints. We have full iron clogging every 4 months. Now we are facing decision of Lime in silo vs. cleaning stone
• Broken valve down over the bank allowing untreated water to escape to stream.
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Big Run #3 Silo Pad
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Big Run #3 Lyme Dosing Silo
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Downstream of the Big Run AMD Treatment Complex
7/28/99 4/11/00 4/21/02 8/3/03 2/18/04 1/22/05 7/9/05 1/21/06 7/22/06 1/17/07 7/21/07 2/4/08 7/27/08 5/3/09 6/26/10 4/6/11 7/18/12-50
0
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100
150
200
250
Combined Total and Hot Acidity (mg/L)
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Big Run #3 OM&R
• At this time, we do not know how much lime is needed/yr or how much it will cost/yr
• The more lime you use, the more sludge is generated for disposal
• No sludge pond, the designed sludge pond is only big enough for #7 but two additional discharges will be sent through silo, #7A and #8
• #3 is a combo of all discharges so it is important to control flow of all other system discharges.
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Big Run AMD Treatment Complex OM&R
• During normal flow, 1hr/wk• During high flow it is easy to spend >20hrs/wk• Not enough sunshine to depend on solar• The more you flush the longer the system is
efficient• Constantly monitoring pH at outflow and
mouth of Big Run
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Blackleggs Creek Watershed Association and Cooperative Trout Nursery
• Find us on Facebook at Blackleggs Creek
Thanks,Art GrGuricWatershed and Nursery Manager