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Blackleggs Creek
Big Run AMD
Treatment
Complex
Indiana County, PA
Big Run AMD Treatment Complex
Big Run #2
Big Run #2 Intake Valve
Big Run #2 Limstone Bed Piping
Big Run #2 Settling Wetland
Big Run #2 Iron Coating of Limestone
Big Run #2 Limestone Washing and
Replacing
Big Run #2 OM&R
• System is too small for flow requires constant
adjustment of boards in drop boxes
• Requires regular flu...
Big Run #7
Big Run #7 Mine Water Capture
Big Run #7
Pipe Labyrinth
Big Run #7 Drop Boxes
Big Run #7 OM&R
• Cleaning Debris around mine opening
• Cleaning Stone
• Flushing
• Cleaning and replacing stone
• Cloggin...
Big Run #7A Mine Blowout
#7A #8
Big Run #7A Mine Blowout
Big Run #7A Incidental Coal Extraction
Big Run #7, #7A, and #8 Combined
Discharges of Big Run #7A and #8
#7A #8
Big Run #8 Construction Logistics
Big Run #8 Drilling to Locate Mine
Portal
Big Run #8 Partial Construction to
Protect Against Possible Mine Blowout
Big Run #8 Construction Challenges
Big Run #8 COG and Robot Exploration
Big Run #8 Mine Water Capture
Big Run #8 Mine Water Inflow
Management
Big Run #8 Completed System
Big Run #7, #7A, and #8 Combined
Big Run #8 OM&R
• Ponds too small to treat the flow and iron
levels due to space constraints. We have full
iron clogging e...
Big Run #3 Silo Pad
Big Run #3 Lyme Dosing Silo
Downstream of the Big Run AMD
Treatment Complex
-50
0
50
100
150
200
250
Combined Total and Hot Acidity (mg/L)
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 ...
Big Run AMD Treatment Complex
OM&R
• During normal flow, 1hr/wk
• During high flow it is easy to spend >20hrs/wk
• Not eno...
Blackleggs Creek Watershed
Association and Cooperative Trout
Nursery
• Find us on Facebook at Blackleggs Creek
Thanks,
Art...
Art Grguric, Backleggs Creek Watershed Association, Operations and Maintenance Panel
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Art Grguric, Backleggs Creek Watershed Association, Operations and Maintenance Panel

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Approaches to operations and maintenance of AMD treatment systems. Learn how they deal with tough O&M issues.

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Art Grguric, Backleggs Creek Watershed Association, Operations and Maintenance Panel

  1. 1. Blackleggs Creek Big Run AMD Treatment Complex Indiana County, PA
  2. 2. Big Run AMD Treatment Complex
  3. 3. Big Run #2
  4. 4. Big Run #2 Intake Valve
  5. 5. Big Run #2 Limstone Bed Piping
  6. 6. Big Run #2 Settling Wetland
  7. 7. Big Run #2 Iron Coating of Limestone
  8. 8. Big Run #2 Limestone Washing and Replacing
  9. 9. 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
  10. 10. Big Run #7
  11. 11. Big Run #7 Mine Water Capture
  12. 12. Big Run #7 Pipe Labyrinth
  13. 13. Big Run #7 Drop Boxes
  14. 14. Big Run #7 OM&R • Cleaning Debris around mine opening • Cleaning Stone • Flushing • Cleaning and replacing stone • Clogging pipes
  15. 15. Big Run #7A Mine Blowout #7A #8
  16. 16. Big Run #7A Mine Blowout
  17. 17. Big Run #7A Incidental Coal Extraction
  18. 18. Big Run #7, #7A, and #8 Combined
  19. 19. Discharges of Big Run #7A and #8 #7A #8
  20. 20. Big Run #8 Construction Logistics
  21. 21. Big Run #8 Drilling to Locate Mine Portal
  22. 22. Big Run #8 Partial Construction to Protect Against Possible Mine Blowout
  23. 23. Big Run #8 Construction Challenges
  24. 24. Big Run #8 COG and Robot Exploration
  25. 25. Big Run #8 Mine Water Capture
  26. 26. Big Run #8 Mine Water Inflow Management
  27. 27. Big Run #8 Completed System
  28. 28. Big Run #7, #7A, and #8 Combined
  29. 29. 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.
  30. 30. Big Run #3 Silo Pad
  31. 31. Big Run #3 Lyme Dosing Silo
  32. 32. Downstream of the Big Run AMD Treatment Complex -50 0 50 100 150 200 250 Combined Total and Hot Acidity (mg/L)
  33. 33. 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.
  34. 34. 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
  35. 35. Blackleggs Creek Watershed Association and Cooperative Trout Nursery • Find us on Facebook at Blackleggs Creek Thanks, Art GrGuric Watershed and Nursery Manager

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