lignite mining and reclamation process joe friedlander the coteau properties co
TRANSCRIPT
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Lignite Mining andReclamation Process
Joe FriedlanderThe Coteau Properties Co.
Lignite Mining andReclamation Process
Joe FriedlanderThe Coteau Properties Co.
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Presentation OverviewPresentation Overview
History of Regulation
The Process of Mining and Reclamation
Harmony Lake
History of Regulation
The Process of Mining and Reclamation
Harmony Lake
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Increased surface mining in the early 1900s led to passage of the first reclamation laws in the 1930s in the East.
Increased surface mining in the early 1900s led to passage of the first reclamation laws in the 1930s in the East.
History of RegulationHistory of Regulation
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Some 14,000 acres of abandoned mined lands, or “orphan spoils”, still exist in North Dakota. Much of this land is managed by the Game & Fish Department for wildlife habitat and hunting.
Some 14,000 acres of abandoned mined lands, or “orphan spoils”, still exist in North Dakota. Much of this land is managed by the Game & Fish Department for wildlife habitat and hunting.
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1969 - North Dakota Strip Mined Lands Act
1971 - Grade spoils to accommodate farm machinery
1973 - Save and replace topsoil
1975 - Mined lands must be returned to 100% of pre-mine productivity
1969 - North Dakota Strip Mined Lands Act
1971 - Grade spoils to accommodate farm machinery
1973 - Save and replace topsoil
1975 - Mined lands must be returned to 100% of pre-mine productivity
Regulatory DevelopmentsRegulatory Developments
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Look closely and you can read the history of North Dakota reclamation in the landscape.
Look closely and you can read the history of North Dakota reclamation in the landscape.
Early reclamation: rolling landscape, seeded grasses
Orphan spoils
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US DEPARTMENT OFINTERIOR
US DEPARTMENT OFINTERIOR NORTH DAKOTA
PUBLIC SERVICE COMMISSION
NORTH DAKOTAPUBLIC SERVICE
COMMISSIONOffice ofSurface Mining
Office ofSurface Mining
other bureaus,offices
other bureaus,offices
other divisionsother divisions
Reclamation DivisionReclamation Division
oversight
(if PSC fails)
REGULATES NORTH DAKOTA SURFACE COAL MININGREGULATES NORTH DAKOTA SURFACE COAL MINING
1977 Passage of the Federal Surface Mining Control and Reclamation Act (SMCRA)
1977 Passage of the Federal Surface Mining Control and Reclamation Act (SMCRA)
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The Process ofMining and Reclamation
The Process ofMining and Reclamation
1. Obtain mining rights and regulatory approvals
2. Establish water management
3. Remove topsoil and subsoil
4. Move overburden and remove coal
5. Grade spoils to approximate original contour
6. Spread subsoil and topsoil and seed with grasses or crops
1. Obtain mining rights and regulatory approvals
2. Establish water management
3. Remove topsoil and subsoil
4. Move overburden and remove coal
5. Grade spoils to approximate original contour
6. Spread subsoil and topsoil and seed with grasses or crops
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Step 1. Obtain Mining Rights and Regulatory Approvals
Step 1. Obtain Mining Rights and Regulatory Approvals
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Secure Leases or Ownership...Secure Leases or Ownership...
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Geological drilling is done to characterize the extent and quality of coal and the type and amount of overburden that must be moved.
Geological drilling is done to characterize the extent and quality of coal and the type and amount of overburden that must be moved.
An exploration permit must be obtained. Drill hole sites are reclaimed immediately after completion.
An exploration permit must be obtained. Drill hole sites are reclaimed immediately after completion.
...And Collect Baseline Data......And Collect Baseline Data...
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Pre-mine soils, vegetation, land use and wildlife surveys are conducted.Pre-mine soils, vegetation, land use and wildlife surveys are conducted.
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Surface water and ground water quantity and quality are assessed. This includes stockponds, wetlands, springs and water wells.Surface water and ground water quantity and quality are assessed. This includes stockponds, wetlands, springs and water wells.
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Cultural resource surveys identify important archaeological and historical sites that must be studied further or mitigated prior to mining, or avoided completely.
Cultural resource surveys identify important archaeological and historical sites that must be studied further or mitigated prior to mining, or avoided completely.
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All this information, plus proposed mining and reclamation plans, is compiled into a mining permit application...
All this information, plus proposed mining and reclamation plans, is compiled into a mining permit application...
and submitted to the Public Service Commission for their review and approval...
and submitted to the Public Service Commission for their review and approval...
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Required warning signs are placed on the permit area perimeter immediately after permit approval.
Required warning signs are placed on the permit area perimeter immediately after permit approval.
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The first earthwork activity is to build sediment ponds downstream from areas to be mined.The first earthwork activity is to build sediment ponds downstream from areas to be mined.
Step 2. Establish Water ManagementStep 2. Establish Water Management
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Water running into sediment ponds is allowed to settle until it meets EPA effluent standards, consisting of total suspended solids, pH and iron.
Water running into sediment ponds is allowed to settle until it meets EPA effluent standards, consisting of total suspended solids, pH and iron.
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When water is clean enough to meet these standards it can be discharged off the mine and down its normal drainage.When water is clean enough to meet these standards it can be discharged off the mine and down its normal drainage.
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The size and shape of a sediment pond depends on the size of its contributing watershed and the topography of the pond site.
The size and shape of a sediment pond depends on the size of its contributing watershed and the topography of the pond site.
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Some ponds have a valve for discharging and some must be pumped...
Some ponds have a valve for discharging and some must be pumped...
…regardless of the discharge method, all water leaving the mine is sampled for compliance.
…regardless of the discharge method, all water leaving the mine is sampled for compliance.
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Sediment ponds must be cleaned out occasionally.Sediment ponds must be cleaned out occasionally.
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Step 3. Remove Topsoil and SubsoilStep 3. Remove Topsoil and Subsoil
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Soil is hauled with tractor-scrapers, shovels, backhoes or loaders into haul trucks.Soil is hauled with tractor-scrapers, shovels, backhoes or loaders into haul trucks.
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Soil monuments are staked islands of topsoil and subsoil left after stripping, to tell how much soil has been removed.
Soil monuments are staked islands of topsoil and subsoil left after stripping, to tell how much soil has been removed.
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Soil is either directly spread on reclaimed land behind the active pit...
Soil is either directly spread on reclaimed land behind the active pit...
…or stockpiled for later respread on reclaimed land. All soil stockpiles are numbered and
identified by owner.
…or stockpiled for later respread on reclaimed land. All soil stockpiles are numbered and
identified by owner.
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All operations are inspected regularly by the Public Service Commission.
All operations are inspected regularly by the Public Service Commission.
Some areas require PSC approval after all soil has been removed.
Some areas require PSC approval after all soil has been removed.
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Step 4. Move Overburdenand Remove Coal
Step 4. Move Overburdenand Remove Coal
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All mines in North Dakota use electric powered draglines as their primary overburden removal machine.
All mines in North Dakota use electric powered draglines as their primary overburden removal machine.
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Supplemental earthmoving machinery includes large electric loading shovels, hydraulic excavators and front end loaders, combined with large haul trucks.
Supplemental earthmoving machinery includes large electric loading shovels, hydraulic excavators and front end loaders, combined with large haul trucks.
These have advantages in flexibility. Spoil can be placed exactly where desired, reducing final reclamation grading costs.These have advantages in flexibility. Spoil can be placed exactly where desired, reducing final reclamation grading costs.
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After the coal is exposed it is cleaned and ripped or blasted to prepare it for loading...After the coal is exposed it is cleaned and ripped or blasted to prepare it for loading...
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Coal is then loaded out of the pit using electric loading shovels or front end loaders
Coal is then loaded out of the pit using electric loading shovels or front end loaders
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Coal is hauled to the truck dump, or tipple, where it is crushed and delivered to the customer.
Coal is hauled to the truck dump, or tipple, where it is crushed and delivered to the customer.
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Step 5. Grade SpoilsStep 5. Grade Spoils
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Spoils are normally graded toward the active pit.Spoils are normally graded toward the active pit.
Active pitDirection of miningRecently cast spoil
Previously graded spoilsFinished and ready for
soil spreading
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Spoils must be graded to the “approximate original contour” of the land prior to mining. Graded spoils must be approved by the PSC before soil can be spread over them.
Spoils must be graded to the “approximate original contour” of the land prior to mining. Graded spoils must be approved by the PSC before soil can be spread over them.
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Step 6. Spread Subsoil and Topsoil and Seed With Grasses and Crops
Step 6. Spread Subsoil and Topsoil and Seed With Grasses and Crops
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Soil may be hauled by tractor-scrapers or trucks. Soil dumped by trucks is spread with bulldozers. Soil depth stakes are set or a GPS system is used to control soil depths.
Soil may be hauled by tractor-scrapers or trucks. Soil dumped by trucks is spread with bulldozers. Soil depth stakes are set or a GPS system is used to control soil depths.
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Topsoil is tilled and a seedbed is prepared. Rocks are picked off reclaimed land prior to seeding.
Topsoil is tilled and a seedbed is prepared. Rocks are picked off reclaimed land prior to seeding.
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Native grasses are seeded on areas reclaimed to prairie...Native grasses are seeded on areas reclaimed to prairie...
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…and local farmers plant and harvest crops on reclaimed cropland. In North Dakota mining companies do not farm reclaimed croplands.
…and local farmers plant and harvest crops on reclaimed cropland. In North Dakota mining companies do not farm reclaimed croplands.
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Some reclaimed lands are seeded to a hay crop of alfalfa and grasses.
Some reclaimed lands are seeded to a hay crop of alfalfa and grasses.
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Soil removalSoil removal
Overburden removalOverburden removal
Coal removalCoal removal
Spoils gradingSpoils grading
Spread soil and plant seedSpread soil and plant seed
Soil stockpilesSoil stockpiles
Sediment pondSediment pond
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Harmony LakeHarmony Lake
A unique reclamation opportunity is presented at the Freedom Mine
A unique reclamation opportunity is presented at the Freedom Mine
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The project was developed at The Coteau Properties Company Freedom Mine near Beulah, North DakotaThe project was developed at The Coteau Properties Company Freedom Mine near Beulah, North Dakota
Freedom Mine
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coal to be mined orphan spoils
abandoned final highwall & pit
direction of historic mining
direction of Coteau’s mining
Pre-Mining Conditions in 1991Pre-Mining Conditions in 1991
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Abandoned orphan spoils from historic mining – not redisturbed by modern mining
Mining in 1997Mining in 1997
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final pit from Coteau’s
miningfinal pit from
historic mining orphan spoilsnewly cast spoils
Double Final Pit CreatedDouble Final Pit Created
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coal has been removed; spoil hauled back in to tie to abandoned orphan spoils
topography graded to “approximate original
contour”
Standard Reclamation as Required by Regulations
Standard Reclamation as Required by Regulations
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spoil not hauled in to fill double final pit; lake and surrounding landscape shaped to a wildlife management area, under a recreation land use
Alternative Reclamation:Development of Harmony Lake
Alternative Reclamation:Development of Harmony Lake
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Following Spoil Grading, Before Soil Spreading
Following Spoil Grading, Before Soil Spreading
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Harmony Lake TodayHarmony Lake Today
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Submerged and exposed rock islands, a convoluted shoreline with steep banks, and earthen fishing piers enhance the lake fishery
Submerged and exposed rock islands, a convoluted shoreline with steep banks, and earthen fishing piers enhance the lake fishery
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Rock was placed on fishing piers to control erosion
Rock was placed on fishing piers to control erosion
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A concrete boat ramp provides lake access for small boatsA concrete boat ramp provides lake access for small boats
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The Game and Fish Department has stocked the lake with largemouth bass, bluegills, minnows, and trout.
The Game and Fish Department has stocked the lake with largemouth bass, bluegills, minnows, and trout.
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With great
success!
With great
success!
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On August 28, 2003, the Public Service Commission
approved final bond release for the Harmony
Lake Wildlife Management Area. Interest in the project was so great that the story made front-page news in
the Bismarck Tribune.
On August 28, 2003, the Public Service Commission
approved final bond release for the Harmony
Lake Wildlife Management Area. Interest in the project was so great that the story made front-page news in
the Bismarck Tribune.
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Harmony Lake…from dragline tofishin’ line!
Harmony Lake…from dragline tofishin’ line!