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Northern Star Generation Services

Cambria Cogen Company

Ebensburg, PA

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• 88 MWnet power from 98 MWgross power– Can power about 100,000 homes

• Waste coal (bituminous refuse)• Two Circulating Fluidized Bed (CFB) boilers

– 410,000 lb/hr steam each– 1,550 psig, 955° F

• One steam turbine/generator• Commercial operation in March 1991• Integrated Operation between plant and fuel pile

management

Cambria Overview:

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• Electricity: Open Market (PJM)

• Steam: Sold to Cambria Care

• Fuel: Own Two Piles – Ernest/Lucerne

– Cambria Fuel Management – daily Ops

• Limestone: New Enterprise

• Water Supply: Wilmore Reservoir

Long-Term Contracts:

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Ernest• Original area mining was conducted from 1903 to 1965. • Assessment of the pile estimated volume to be 11,500,000 tons

covering 94 acres. • Cambria Reclamation Company purchased the pile in 1995

– Reclamation began in October 1996

Lucerne• Original area mining was conducted from 1907 to 1967.• Original assessment of the pile estimated volume to be 8,700,000

tons covering 125 acres.• Cambria Reclamation Company purchased the pile in 1995

– Began to remove fuel in May 2012– Approximately 700,000 tons per year

Fuel Management:

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Fuel Management:

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Fuel Management:

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Fuel Management

• Reclamation Begins with Beneficial Use Ash

• Beneficial Use Permit

– Quarterly Coal Ash Quality Assessment

– Fly Ash and Bottom Ash

– Over 30 constituents analyzed

• Heavy metals, nitrates, pH, CaCO3,etc

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Fuel Management

• Fuel hauled to plant with ash haul back

• Ash placed in 2ft compacted lifts

• Water added for compaction and dust management

• At final grade elevation of ash placement– Clay and top soil added – Fertilizer – Grasses, trees, shrubs, etc.

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Fuel Management

• Reclamation – Goal is Wildlife Habitat– Types of grass and trees planted

• Annual rye grass• Perennial Rye• Birds foot Trefoil• Clover and Timothy• Bent grass and Oats• American Chestnut Hybrid

– Coordinated with the Office of Surface Mining

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Environmental - Ernest

• Evaluating the Impact – Is this working?

• Water Quality Monitoring - Monthly

• 24 surface monitoring points

• 3 ground water wells.

• Monitor to ensure mining activity is not adversely affecting the groundwater or McKee Run

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Environmental - Ernest

Hydrologic Unit

AcidityLbs/day

IronLbs/day

ManganeseLbs/day

AluminumLbs/day

No. 1

Baseline -CV 671.89 77.08 2.17 65.71

Currently 90.87 1.33 0.35 12.20

No. 2

Baseline -CV 13,306.74 3357.98 26.59 894.63

Currently 92.89 1.77 0.30 12.40

No. 3

Baseline-CV 4.13 0.02 0.15 0.36

Currently 0.05 0.00 0.00 0.0112

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Local Watershed Project

• Clearfield Creek Watershed Association

• Ferris Wheel Re-vegetation

• Project Goals – Reclaim 30 acres of abandoned surface mine– Reduce AMD into Little Laurel Run and

Clearfield Creek

• Project Partners– PADEP, EPA, Blair County, Cambria Cogen

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Local Watershed Project

• Project Description – Re-grade and reclaim – Top soil and/or clay where needed– Neutralize mine spoil with alkaline ash – Warm and Cool season grasses– 3,000 trees planted through PGC Cooperative– Organic material added

• Mushroom Compost • Leaf Compost

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Local Watershed Project

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Local Watershed Project

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Local Watershed Project

• Pre-Construction Water Quality– Average flow 188 gpm– Average pH = 3.4– Average Acidity = 100 mg/L– Average Iron = 8 mg/L– Average Aluminum = 6 mg/L

Recently started post construction monitoring

30 gpm flow reduction and 8 lbs/day aluminum17

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Lilly Site – Pile Nos. 1, 4 and 5

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Lilly Site – Piles Nos. 1, 2 and 3

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Lilly Site - Pile 2 Collection Ditch (CD-5)

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Lilly Site – Pile 2 Diversion Ditch (DD-6)

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Lilly Site - Pile Nos. 4 and 5 ReclaimedAmber Waves of Grain

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Questions: