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Inclined Plane Study Johnstown, PA Greater Johnstown Watershed Association and CME Engineering LP

Inclined Plane Study Johnstown, PA Greater Johnstown Watershed Association and CME Engineering LP. Inclined Plane Discharge (Q). Extent of Mine 72. Bethlehem Mine 72. Lower Kittanning seam Mined out area ≈ 8,540 acres Mine pool area ≈ 5,000 acres

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Inclined Plane Study Johnstown, PA Greater Johnstown Watershed Association and CME Engineering LP

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  1. Inclined Plane StudyJohnstown, PAGreater Johnstown Watershed Associationand CME Engineering LP

  2. Inclined Plane Discharge (Q)

  3. Extent of Mine 72

  4. Bethlehem Mine 72 • Lower Kittanning seam • Mined out area ≈ 8,540 acres • Mine pool area ≈ 5,000 acres • Pool volume ≈ 3.9 billion gals. (60% extraction and 4 ft void height)

  5. Mine 72 mine pool

  6. Mine pool elevations

  7. Discharge culvert at Inclined Plane

  8. Weir at Inclined Plane

  9. Inclined Plane Q • Median 444 gpm • Maximum 1000 gpm • Minimum 150 gpm

  10. Water Chemistry (median values)June 2004 – March 2008 • pH (field) 5.8 • Hot Acidity 363 mg/L • Alkalinity 58 mg/L • Total Manganese 2.1 mg/L • Iron • Total 231 mg/L • Ferrous 239 mg/L • Ferric 0.0 mg/L

  11. Iron mound

  12. Acidity Load • Median Q 1628 lbs/day • Maximum Q 3510 lbs/day

  13. Eliminating Inclined Plane Q • Lower pool elevation to 1150 ft • Mine pool area reduced by about 87 acres • Pool volume reduced by about 11 million gals. • (≈ 3% reduction) • Leaves about 3.8 billion gals. for geothermal

  14. Water temperatureInclined Plane shaft • 56° F • 55° F

  15. Comparison of geothermal and conventional heat sources

  16. Geothermal vs. air source heat pump

  17. Closed Loop System • Ex. Cornell University

  18. Beth 72 Mine PoolGeothermal capacity Estimates

  19. Geothermal capacity based on USDOE estimates • 1,300 ft³ heating-cooling capacity/gpm • 5 gpm usage for typical home • Savings are vs. conventional electric heating and cooling systems, price /Kwh as of Oct. 2008

  20. Next Steps • Funding for: • Pump test • Geothermal heating and cooling feasibility study

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