Coal-Fired Plants in Montana and Wyoming
Colstrip
Location: MT
Operator: PPL Montana LLC
Configuration: 2 X 307 MW, 2 X 740 MW
Operation: 1975-1986
Fuel: subbituminous coal
Boiler supplier: CE
T/G supplier: GE, WH
EPC: Bechtel
Quick facts: Colstrip is the second largest coal-fired project west of the Mississippi and consistently ranked as one of the lowest cost plants in the Western Electricity Coordinating Council. The plant employs about 300 people and is jointly owned by PPL Generation LLC with Portland General Electric Co, Puget Sound Energy, PacifiCorp, Avista Corp, and NorthWestern Energy LLC.

Photograph courtesy of PPL Corp
Posted 27 Aug 2005

Dave Johnston
Location: WY
Operator: PacifiCorp
Configuration: 2 X 114 MW, 1 X 230 MW, 1 X 360 MW
Operation: 1958-1972
Fuel: subbituminous coal
Boiler supplier: B&W, CE
T/G supplier: GE
EPC: Ebasco
Quick facts: Groundbreaking ceremonies were in Jun 1956 and Unit-1 was completed in Oct 1958. At completion of the first phase, Dave Johnston was the largest coal-fired plant in the Rocky Mountain region. Fuel is supplied from the Glenrock Mine 16mi north of the plant site and from the Dry Fork Mine in Gillette.

Photograph by Greg Goebel
Posted 15 Oct 2006

Dry Fork
Location: WY
Operator: Basin Electric Power Cooperative
Configuration: 1 X 422 MW
Operation: 2011
Fuel: subbituminous coal
Boiler supplier: B&W
T/G supplier: MHI, Melco
EPC: Sargent & Lundy, Ames Construction, Fagen
Quick facts: Dry Fork is 7mi north of Gilletteis. The plant is owned by Basin Electric (92.9%) and Wyoming Municipal Power Agency (7.1%). Dry Fork Station was dedicated on 11 Aug 2011. and went comercial on 1 Nov 2011. Coal is deliverd by a 1mi conveyor from the Dry Fork Mine. The plant cost over $1bn.

Photograph courtesy of Basin Electric Power Coop
Posted 18 Feb 2012

Hardin
Location: MT
Operator: Bicent Power
Configuration: 1 X 119 MW
Operation: 2006
Fuel: subbituminous coal
Boiler supplier: B&W
T/G supplier: GE
EPC: Colorado Energy Management, NewMech Cos
Quick facts: Hardin is in southern Montana on lands of the Crow Nation. The boiler was relocated from South Africa and paired with a refurbished T/G set from South Korea. Coal is from the Absaloka Mine, owned by the Crow Nation and operated by Westmoreland Resources, Inc. The $250mn, baseload plant sells its entire output to BC Hydro’s Powerex Corp. Construction began in Dec 2003 and the unit went commercial in Mar 2006. Colorado Energy Management is the O&M contractor.

Photograph courtesy of NewMech Cos
Posted 20 Aug 2008

J E Corette
Location: MT
Operator: Talen Corp
Configuration: 1 X 162 MW
Operation: 1968 (ret)
Fuel: subbituminous coal
Boiler supplier: CE
T/G supplier: WH
EPC: Bechtel
Quick facts: In June 2005, Corette became the first industrial facility in Montana to achieve Star safety certification from OHSA. This plant, along with Colstrip and several other power stations, was acquired from Montana Power in December 1999. The plant is named after J E Corette who, in 1977, retired as Chairman of Montana Power after 46yrs of service with the company. Corette was closed in Apr 2015 and, with many other power plants, was spun off to Talen Corp in Jun 2015. Corette demolition began later in the year and the boiler was toppled in Oct 2015.

Photograph courtesy of PPL Corp
Posted 27 Aug 2005

Jim Bridger
Location: WY
Operator: PacifiCorp
Configuration: 4 X 575 MW
Operation: 1974-1979
Fuel: subbituminous coal
Boiler supplier: CE
T/G supplier: GE
EPC: Bechtel
Quick facts: Each unit has a B&W wet sodium carbonate FGD scrubber and the whole plant is zero discharge for waste water.

Photograph by reydepersia (Panoramio)
Re-posted 18 Feb 2012

Lewis & Clark
Location: MT
Operator: Montana-Dakota Utilities
Configuration: 1 X 57 MW
Operation: 1958
Fuel: lignite, natural gas
Boiler supplier: CE
T/G supplier: GE
EPC: Ebasco
Quick facts: On 6 Jun 1956, MDU broke ground for the Lewis & Clark power station on the Yellowstone River. The new plant went online in Oct 1958 and cost $12mn. In Dec 1975, MDU installed a wet-disc particulate scrubber at the station. At completion, Lewis & Clark was the largest lignite-fired unit in the USA or Canada. Fuel is from the Savage Mine, which produces about 250,000 tpy of lignite. It is owned and operated by Westmoreland Coal Co.

Photograph courtesy of Society for Industrial Archeology
Posted 25 Jul 2009

Naughton
Location: WY
Operator: PacifiCorp
Configuration: 1 X 163 MW, 1 X 218 MW, 1 X 326 MW
Operation: 1963-1971
Fuel: subbituminous coal
Boiler supplier: CE
T/G supplier: GE, WH
EPC: Bechtel, Stearns-Roger, Jelco
Quick facts: This plant is named for Edward M Naughton, a former president of Utah Power & Light Co. The 1,120ac site is near Kemmerer. Coal burn is up to 2.8mn tons from adjacent coal deposits mined by Chevron Mining Inc and delivered on a 4,200ft belt conveyor.

Photograph courtesy of PacifiCorp
Posted 20 Feb 2012

Neil Simpson-II/Wygen-I
Location: WY
Operator: Black Hills Energy Inc
Configuration: 2 X 90 MW
Operation: 1995-2003
Fuel: subbituminous coal
Boiler supplier: B&W
T/G supplier: GE
EPC: B&V, TIC, B&W
Quick facts: The Wygen/Simpson complex consits of a series of baseload, minemouth coal-fired plants. Wygen-I was built as a merchant plant. It has a B&W baghouse, dry scrubber, and SCR.

Photograph courtesy of Black Hills Corp
Posted 16 Sep 2006

Wygen-II
Location: WY
Operator: Black Hills Energy Inc
Configuration: 1 X 95 MW
Operation: 2008
Fuel: subbituminous coal
Boiler supplier: B&W
T/G supplier: GE
Quick facts: Construction of Wygen-II as a regulated asset was approved in Aug 2005 and the unit went commercial on 1 Jan 2008 on schedule. Back-end pollution control equipment is similar to that of Wygen I, but the new unit has dedicated mercury-control equipment as well. Wygen II cost about $169mn.

Photograph courtesy of Black Hills Corp
Posted 16 Sep 2006

Wyodak
Location: WY
Operator: PacifiCorp
Configuration: 1 X 362 MW
Operation: 1978
Fuel: subbituminous coal
Boiler supplier: B&W
T/G supplier: GE
EPC: Stone & Webster
Quick facts: Wyodak has a 36ac site near Gillette 75mi west of the border between Wyoming (Wyo) and South Dakota (dak). It was the world's largest air-cooled steam-electric plant at commissioning. The plant is jointly-owned by Black Hills Power and burns about 2mn tpy of subbituminous coal supplied via conveyor from the Wyodak Mine, adjacent to the plant and owned and operated by Black Hills Corp.

Photograph courtesy of PacifiCorp
Posted 20 Feb 2012

 

Abbreviations

Data: industcards, Platts UDI World Electric Power Plants Data Base

Updated 28-Oct-2015

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