Challenges and Benefits of Using Mine Pool Water for Hydraulic - - PowerPoint PPT Presentation

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Challenges and Benefits of Using Mine Pool Water for Hydraulic - - PowerPoint PPT Presentation

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Challenges and Benefits of Using Mine Pool Water for Hydraulic Fracturing Tom Gray, PE Heather Trexler, PG July 24, 2012 OUTLINE OUTLINE Availability of mine water Availability of mine water Mine water characteristics Mine

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SLIDE 1

Challenges and Benefits of Using Mine Pool Water for Hydraulic Fracturing

Tom Gray, PE Heather Trexler, PG July 24, 2012

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SLIDE 2

OUTLINE OUTLINE

  • Availability of mine water
  • Mine water characteristics
  • Benefits of using mine water
  • Challenges of using mine water
  • Evaluation and permitting
  • Mine pool management
  • Example projects
  • Conclusions
  • Availability of mine water
  • Mine water characteristics
  • Benefits of using mine water
  • Challenges of using mine water
  • Evaluation and permitting
  • Mine pool management
  • Example projects
  • Conclusions
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SLIDE 3

PENNSYLVANIA’S CURRENT AMD ISSUES PENNSYLVANIA’S CURRENT AMD ISSUES

  • 2,400 miles of abandoned mine

drainage (AMD) polluted streams

  • PADEP has limited funding for

treatment of discharges and cleaning streams

  • Four main classes of discharges:
  • Active operator, treated discharge
  • Closed mine, treated discharge
  • Orphaned discharge (Pre-1977), no

treatment

  • Legacy / Forfeited, discharge

treated by DEP

  • 2,400 miles of abandoned mine

drainage (AMD) polluted streams

  • PADEP has limited funding for

treatment of discharges and cleaning streams

  • Four main classes of discharges:
  • Active operator, treated discharge
  • Closed mine, treated discharge
  • Orphaned discharge (Pre-1977), no

treatment

  • Legacy / Forfeited, discharge

treated by DEP

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SLIDE 4

AVAILABILITY OF MINE WATER AVAILABILITY OF MINE WATER

  • Hydraulic fracturing requires large

volumes of water

  • Water sources are limited
  • Surface water
  • Ground water
  • Water delivery challenges
  • Trucking
  • Piping
  • Large quantities of water are available

from abandoned mines

  • Mine pools are present throughout the

Marcellus Shale Play

  • Hydraulic fracturing requires large

volumes of water

  • Water sources are limited
  • Surface water
  • Ground water
  • Water delivery challenges
  • Trucking
  • Piping
  • Large quantities of water are available

from abandoned mines

  • Mine pools are present throughout the

Marcellus Shale Play

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SLIDE 5

MARCELLUS SHALE MAP – WELLS ONLY MARCELLUS SHALE MAP – WELLS ONLY

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SLIDE 6

WELLS AND MINE DISCHARGES WELLS AND MINE DISCHARGES

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SLIDE 7

MINE WATER CHARACTERISTICS MINE WATER CHARACTERISTICS

  • Typical flow ranges

from 300 gpm to 3,000 gpm (1/2 MGD to 1.5 MGD)

  • Acidic or neutral
  • Iron 1 ppm to 100 ppm
  • Aluminum, manganese
  • Sulfates 50 ppm to

1,000 ppm

  • Typical flow ranges

from 300 gpm to 3,000 gpm (1/2 MGD to 1.5 MGD)

  • Acidic or neutral
  • Iron 1 ppm to 100 ppm
  • Aluminum, manganese
  • Sulfates 50 ppm to

1,000 ppm

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BENEFITS OF USING MINE WATER BENEFITS OF USING MINE WATER

  • Goodwill / Environmental benefit - reduce metal

loadings and pollutants to watersheds

  • Reduce ‘clean’ water withdraw
  • General close proximity and abundant supply of mine

water

  • For active mines – existing infrastructure and clear
  • wnership
  • Less road damage
  • Goodwill / Environmental benefit - reduce metal

loadings and pollutants to watersheds

  • Reduce ‘clean’ water withdraw
  • General close proximity and abundant supply of mine

water

  • For active mines – existing infrastructure and clear
  • wnership
  • Less road damage
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SLIDE 9

CHALLENGES OF USING MINE WATER CHALLENGES OF USING MINE WATER

  • Water Quality
  • Treatment may be required
  • Quality varies
  • Abandoned discharges – unclear
  • wnership of water and liability
  • Impact of withdraw from mine pool
  • Destabilization of mine
  • Flow may be required for a stream
  • Interbasin transfers
  • Water Quality
  • Treatment may be required
  • Quality varies
  • Abandoned discharges – unclear
  • wnership of water and liability
  • Impact of withdraw from mine pool
  • Destabilization of mine
  • Flow may be required for a stream
  • Interbasin transfers
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EVALUATION AND PERMITTING EVALUATION AND PERMITTING

  • PADEP white paper: Utilization of Mine Influence Water in Well

Development for Natural Gas Extraction

  • Environmental impact from mine water and benefit to watershed
  • Current mine water flow and volume at the site
  • Proposed volume to be used
  • Characterization of the mine water
  • Proposed site development, including storage facilities
  • Spill Prevention Plan
  • Evaluation of mine pool
  • History of mining
  • Mine pool recharge rate
  • Potential of impacts due to subsidence
  • Potential of impacts to water supplies
  • Water Management Plan, E&S Plan, NPDES?
  • PADEP white paper: Utilization of Mine Influence Water in Well

Development for Natural Gas Extraction

  • Environmental impact from mine water and benefit to watershed
  • Current mine water flow and volume at the site
  • Proposed volume to be used
  • Characterization of the mine water
  • Proposed site development, including storage facilities
  • Spill Prevention Plan
  • Evaluation of mine pool
  • History of mining
  • Mine pool recharge rate
  • Potential of impacts due to subsidence
  • Potential of impacts to water supplies
  • Water Management Plan, E&S Plan, NPDES?
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MINE POOL MANAGEMENT MINE POOL MANAGEMENT

  • Lower or maintain pool levels to eliminate

unmanaged discharge

  • Complex issues
  • History of mining, multiple discharges
  • Treatment
  • Quality varies with change in pool elevation
  • Operating & maintenance
  • Not an exact science – need for experience
  • Lower or maintain pool levels to eliminate

unmanaged discharge

  • Complex issues
  • History of mining, multiple discharges
  • Treatment
  • Quality varies with change in pool elevation
  • Operating & maintenance
  • Not an exact science – need for experience
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EXPLORATION AND PRODUCTION FIRMS EXPLORATION AND PRODUCTION FIRMS

  • Need water – 5mil gallon/frac
  • Need goodwill – environmental benefit
  • Want low water cost/less road damage
  • Environmental compliance managed by PADEP
  • Need water – 5mil gallon/frac
  • Need goodwill – environmental benefit
  • Want low water cost/less road damage
  • Environmental compliance managed by PADEP
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EXAMPLE PROJECT – DELAWARE RIVER BASIN EXAMPLE PROJECT – DELAWARE RIVER BASIN

  • Project Driver: DRBC surface water use limitations
  • DRBC – Severe limits on GW/SW withdrawals
  • Supports use of treated mine water imported from

Susquehanna River

  • PADEP & Lackawanna River Groups support mine

water use

  • Tetra Tech:
  • Developed concept to use mine pool water
  • Installed weirs & monitored flows and quality
  • Developed conceptual treatment/

transport plan/cost estimate

  • Project Driver: DRBC surface water use limitations
  • DRBC – Severe limits on GW/SW withdrawals
  • Supports use of treated mine water imported from

Susquehanna River

  • PADEP & Lackawanna River Groups support mine

water use

  • Tetra Tech:
  • Developed concept to use mine pool water
  • Installed weirs & monitored flows and quality
  • Developed conceptual treatment/

transport plan/cost estimate

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EXAMPLE PROJECT – GLADDEN MINE EXAMPLE PROJECT – GLADDEN MINE

  • Gladden Mine Pool
  • South Fayette Township, PA
  • Project participants:
  • South Fayette Conservation District
  • PA DEP
  • Range Resources
  • Tetra Tech
  • Gladden Mine Pool
  • South Fayette Township, PA
  • Project participants:
  • South Fayette Conservation District
  • PA DEP
  • Range Resources
  • Tetra Tech
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EXAMPLE PROJECT – GLADDEN MINE EXAMPLE PROJECT – GLADDEN MINE

  • Mine history
  • Three mine pools
  • Discharge to Chartiers Creek
  • Mine history
  • Three mine pools
  • Discharge to Chartiers Creek
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EXAMPLE PROJECT – GLADDEN MINE EXAMPLE PROJECT – GLADDEN MINE

  • 2005 report by Chartiers

Nature Conservancy

  • “Without treatment of

Gladden Mine discharge, Millers Run or Chartiers Creek could not be restored”

  • Discharge characteristics:
  • Flow ~700 gpm
  • pH 6.0
  • Iron 100 ppm
  • Sulfate 760 ppm
  • 2005 report by Chartiers

Nature Conservancy

  • “Without treatment of

Gladden Mine discharge, Millers Run or Chartiers Creek could not be restored”

  • Discharge characteristics:
  • Flow ~700 gpm
  • pH 6.0
  • Iron 100 ppm
  • Sulfate 760 ppm
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EXAMPLE PROJECT – GLADDEN MINE EXAMPLE PROJECT – GLADDEN MINE

  • DEP goal:
  • Clean the stream
  • Acid neutralization
  • Iron removal
  • Sustainable treatment
  • Range Resources goals:
  • Water supply for well development of adequate quantity/quality
  • Reasonable cost
  • Goodwill
  • DEP goal:
  • Clean the stream
  • Acid neutralization
  • Iron removal
  • Sustainable treatment
  • Range Resources goals:
  • Water supply for well development of adequate quantity/quality
  • Reasonable cost
  • Goodwill
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EXAMPLE PROJECT – GLADDEN MINE EXAMPLE PROJECT – GLADDEN MINE

  • Concept
  • Hydrated lime (or similar material) treatment system
  • Lower mine pool
  • Add second treatment stage for use well use
  • Pump treated water to impoundments at wells
  • Discharge excess water to stream
  • 3rd party operator
  • Cost share
  • Capital
  • Operating and Maintenance
  • Trust Fund
  • At end of drilling, plant and trust fund donated to DEP
  • Concept
  • Hydrated lime (or similar material) treatment system
  • Lower mine pool
  • Add second treatment stage for use well use
  • Pump treated water to impoundments at wells
  • Discharge excess water to stream
  • 3rd party operator
  • Cost share
  • Capital
  • Operating and Maintenance
  • Trust Fund
  • At end of drilling, plant and trust fund donated to DEP
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CONCLUSIONS CONCLUSIONS

  • Issues
  • Liability
  • Cost sharing
  • Environmental compliance
  • Drilling schedule
  • Cost of gas
  • Incentives
  • EPA acceptance
  • Issues
  • Liability
  • Cost sharing
  • Environmental compliance
  • Drilling schedule
  • Cost of gas
  • Incentives
  • EPA acceptance
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CONCLUSIONS CONCLUSIONS

  • Self control vs. regulated
  • Don’t miss other opportunities
  • CSO
  • Alkaline Ash
  • Self control vs. regulated
  • Don’t miss other opportunities
  • CSO
  • Alkaline Ash
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SLIDE 21

THANK YOU! THANK YOU!

THOMAS GRAY, PE (412) 921-8794 tom.gray@tetratech.com THOMAS GRAY, PE (412) 921-8794 tom.gray@tetratech.com HEATHER TREXLER, PG (412) 920-8602 heather.trexler@tetratech.com HEATHER TREXLER, PG (412) 920-8602 heather.trexler@tetratech.com