The Mushroom Farm AML/AMD Project
Transcript of The Mushroom Farm AML/AMD Project
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The Mahoning Valley Mushroom Farm
North Lima, Ohio
AMD Investigation
Department of Geology and Environmental Science
The University of Akron
Theresa McQuade
Ohio Department of Natural Resources
Division of Mineral Resources Management
Cheryl Socotch
April 15, 2013
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Mahoning Valley Mushroom Farm
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The Problem The Problem --
�� OSM identified in formal letter to ODNROSM identified in formal letter to ODNR--MRM in 2007 that Forfeited Permit (DMRM in 2007 that Forfeited Permit (D--0371) 0371) had generated mine drainage and required had generated mine drainage and required action. action.
�� Issue for MRM Issue for MRM –– Final surety release for this Final surety release for this permit occurred in March 1995 permit occurred in March 1995 –– no mine no mine drainage problems assessed at time of drainage problems assessed at time of release. release.
�� Response Response –– MRM need for thorough MRM need for thorough evaluation of mine drainage issues at this evaluation of mine drainage issues at this permit. permit.
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2012
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AMD Issues and problemsAMD Issues and problems
Pre-existing AMD seepage west of house
Rental house
Pre-existing drainage east of house
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Site Conditions Site Conditions
Laminar AMD flow from basement
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Wetland across access road – under SR 164
Laminar AMD flow across drive
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Historical Mining in AreaHistorical Mining in Area
�� CC--1442 D&D Mining 1442 D&D Mining ––Issued May 1981Issued May 1981
41.8 acres41.8 acres�� RepermittedRepermitted byby……
�� DD--0371 Ferris Coal Co 0371 Ferris Coal Co –– Issued January 1985Issued January 1985
51.4 acres total51.4 acres total
�� Ferris completed total Ferris completed total backfill (Phase I) by backfill (Phase I) by 1988 although 1988 although forfeited bond prior to forfeited bond prior to resoilingresoiling (Phase II) (Phase II)
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Local GeologyLocal GeologyMiddle Pennsylvanian,
Allegheny Group
(USGS, 2010)
9(USGS, 2013)
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Extent of Mining in AreaExtent of Mining in Area
Middle Kittanning #6
Lower Freeport #5
Upper Freeport #7
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What MRM did knowWhat MRM did know……
�� Earlier complaint by rental property Earlier complaint by rental property –– ironiron--rich water in basement (1990)rich water in basement (1990)
�� MidMid--9090’’s rental home evacuated s rental home evacuated
�� MRM/OSM increased in flows from seeps MRM/OSM increased in flows from seeps and house over timeand house over time
�� No other discharges directly from mine No other discharges directly from mine sitesite
�� Seeps were preSeeps were pre--existing existing –– PrePre--law issueslaw issues
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Permit Permit
ApplicationApplication--
Hydro Map Hydro Map
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AML/AMD program investigationAML/AMD program investigation
Existing Well intercept mine void 40’ below surface
New MW (artesian) intercept mine void ~ 15’
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Monitor Wells Monitor Wells
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What we knew at this timeWhat we knew at this time……
�� Not much water in backfill spoil Monitor wells Not much water in backfill spoil Monitor wells
�� Artesian flow in MW 1 and 11Artesian flow in MW 1 and 11
�� Water quality in mine backfill water netWater quality in mine backfill water net--alkaline alkaline mine drainagemine drainage
�� Water quality at Rental house severe acidicWater quality at Rental house severe acidic-- high high metalsmetals
�� Flows dramatic increase since original complaint Flows dramatic increase since original complaint
�� Active mining in #7 coal seam elevation Active mining in #7 coal seam elevation –– AMD AMD discharging at lower elevationdischarging at lower elevation
�� Source of severe mine drainage problem? Source of severe mine drainage problem?
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Hypothesis:Hypothesis:
I hypothesize that there is a detectable I hypothesize that there is a detectable
geochemical difference between acid mine geochemical difference between acid mine
drainage that results from a surface or deep drainage that results from a surface or deep
mine.mine.
Objectives:Objectives:
�� Establish groundwater flow regimeEstablish groundwater flow regime
�� Compare water chemistry from surface mine with Compare water chemistry from surface mine with
underground mineunderground mine
�� Identify geochemical signature based on mine typeIdentify geochemical signature based on mine type
�� Identify reason for AMD seep at surfaceIdentify reason for AMD seep at surface
�� Location of AUMLocation of AUM
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The MF SiteThe MF Site
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Surface Water Locations:
Groundwater Locations:
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Methods:
Chemical Analyses:
•Spectrophotometry
•Ion chromatography
•Atomic absorption (AA)
•Inductively coupled
•WebPHREEQ
(aqueous geochem modeling)
• Groundwater flow maps
• Sy calculations
• Aerial Photo Analysis
Fe2+, Fetot, SO2-4, Mn, Mg, Ca, Na, K, Al, Cl
temperature, pH, conductivity, DO
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1 ft pixel resolution LiDAR (ORGRIP)sampling/well locationGW flow direction
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WebPHREEQ Results
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Surface sample GW sample
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Geochemical Signatures
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Surface sample GW sample
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BH1
stream
basement window
BH11
24
1120
1110
1100
fee
t a
bo
ve
se
a le
ve
l
1090
elevation=1115 ft.
TD=1090 ft
brown silty sand
to dry ss
saturated brown ss
open void ending
at underclay
BH11
elevation=1112 ft.
TD=1099 ft
brown silty
clay
clay
BH1
Artesian Wells!
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BH1
stream
basement window
BH11
(facing east)
(facing northeast)
window
Flow direction
Abandoned mine entrance
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Abandoned Underground Mine
MW-1
BH-11
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Potential AUM location
GW flow direction
A. Mushroom Farm Site, North Lima, OH
MW-1BH1
BH9
BH10
BH11
BH1MW-1
BH11
1130
1115
1110
1105
1100
1095
1090
1085
1080
1120
1125
Feet above s
ea level
BH11
TD=26’
TD=245’
MW-1
swl=1113’
swl=1098’
Potential mine void
(distance=~1030 ft)
B.
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Iron, Sulfate, pH
AMD
Northern half
Southern half
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Aerial Photo AnalysisAerial Photo Analysis
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19591959 19651965 19721972 19811981 19831983 19851985 19941994 20002000 20052005 20062006 20092009 20102010 20122012Lake SW of MF Lake SW of MF
propertyproperty
MF'ingMF'ing structure structure
MF rental houseMF rental house
Crops grownCrops grown
Surface mining on Surface mining on
MF property MF property
(permit# D(permit# D--371)371)
Seepage around Seepage around
BH1 locationBH1 location
Appearance of Appearance of
stream channel stream channel
sampling locationsampling location
Drainage pond NNE Drainage pond NNE
of MF structureof MF structure
Seepage behind Seepage behind
rental houserental house
Backfilling of Backfilling of
surface mined area surface mined area
completecomplete
Rental house Rental house
tenants report "red tenants report "red
water" in basementwater" in basement
Drainage pond Drainage pond
directly behind MF directly behind MF
structurestructure
Appearance of Appearance of
wetland sampling wetland sampling
locationlocation
Final reclamation Final reclamation
and reand re--vegetation vegetation
completecomplete
Seep W of BH7 Seep W of BH7
locationlocation
ODNR observation ODNR observation
wells drilledwells drilled
Seep along railroadSeep along railroad
Aerial Photo Analysis
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Change in Infiltration and PermeabilityChange in Infiltration and Permeability
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precipitation
AMD seep
Pre-surface mining:
During surface mining:
Post-surface mining:
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ConclusionsConclusions
�� Radial groundwater flow patternRadial groundwater flow pattern
�� Geochemical signature for AMD coming from Geochemical signature for AMD coming from
the mine void established at BH11, BH1, the mine void established at BH11, BH1,
window, and streamwindow, and stream
�� AMD discharging around the house = most AMD discharging around the house = most
severesevere
�� Mine void connects BH11 and MWMine void connects BH11 and MW--1, possibly 1, possibly
contains some amount of refusecontains some amount of refuse
�� AMD discharging is a direct result of change AMD discharging is a direct result of change
in surface infiltrationin surface infiltration32
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Thank you,
Questions?