- Southeast Steam Plant
name =Twin City Rapid Transit Company Steam Power Plant
caption = View from the south (Note the Stone Arch Bridge to left)
location = 12--20 Sixth Ave. SE.
lat_degrees = 44
lat_minutes = 58
lat_seconds = 51
lat_direction = N
long_degrees = 93
long_minutes = 14
long_seconds = 57
long_direction = W
architect =Sargent and Lundy
architecture = Renaissance
November 25, 1994
refnum = 94001385
The Southeast Steam Plant also known as the Twin City Rapid Transit Company Steam Power Plant is a combined heat and power plant on the
Mississippi Riverin the city of Minneapolis, Minnesotain the United States, and is owned by the University of Minnesota.
. It supported the area's major form of public transportation for 50 years.
Minneapolis converted to
buses in 1949–1954,cite web | title= Twin City Rapid Transit Company Records. Minnesota Historical Society | date= 1872-2001 | url= http://www.mnhs.org/library/findaids/00207.html | accessdate= 2007-04-08] and in the early 1950s, Northern States Power Company, now Xcel Energy, acquired the building.cite web | author= Lee, Antoinette J. | publisher= "Cultural Resource Management" 19 (6) | title= Historians Then, Historians Now | url= http://crm.cr.nps.gov/archive/19-6/19-6-16.pdf | date= undated | accessdate= 2007-04-08] In 1976 the university purchased the plant.
The facility heats 94 buildings—nearly all of the university's Minneapolis campus, cools 19 of those buildings, and provides
steamto the University of Minnesota Medical Center, Minnesota State Board of Health and Cedar Riverside People's Center. Captured as the steam leaves the plant, pressure powers the plant and provides 20% of the university's electricity. The plant's steam is transported through an 18 mile (29 km) network of tunnels to the campus buildings and would be enough to heat 55,000 homes. Each student pays about $200 for energy and those in residence halls pay $375 a year for heat and air conditioning, water heating and dining services.cite web | author= Kaiser, Emily | title= Under Heat | publisher= "The Minnesota Daily" | date= October 18 2005| url= http://www.mndaily.com/articles/2005/10/18/65656 | accessdate= 2007-0-4-06]
The plant is university building #059.cite web | title= University of Minnesota Twin Cities Campus | url= http://www.facm.umn.edu/2004bldglist.pdf | date=
July 21 2004| accessdate= 2007-04-08] The university's Energy Management department, part of Facilities Management, oversees the plant. Foster Wheeler Twin Cities has contracted with the U of M to operate it since 1992.
Just upstream is the
Hennepin Island Hydroelectric Plantoperated by Xcel Energy. The university's Saint Paul, Minnesotacampus three miles (5 km) away has its own plant. In addition the university has generators, pumpsand boilers powered by dieseland natural gas, most used only in emergencies, with 11 used as peak shaving units.cite web | author= Sandberg, Richard J. for Minnesota Pollution Control Agency | title= Technical Support Document, Permit Action Number: 05301050-001 | url= http://www.pca.state.mn.us/air/permits/issued/05301050-001-aqpermit.pdf | date= May 31 2006| accessdate= 2007-04-08]
Before pipes were reinsulated, employees needed breaks once an hour to work in the tunnels which reached 115° F (46° C). Insulation reduced the ambient temperature to 80° F (27° C), and the loss of energy from 10% to 4%, and over time resulted in a 25% campus-wide decrease in energy consumption.cite web | author= Franzén, Carl | publisher= "Kiosk" | title= Custodians of the Planet | url= http://www1.umn.edu/urelate/kiosk/0402kiosk/custodians.html | date=
March 27 2002| accessdate= 2007-04-08]
The university closed the Southeast plant to gut and rebuild the interior, and in 2000, reopened it and closed down its old coal-burning power plant.
Completed in 2005, exterior rehabilitation won a local
historic preservationaward, presented to the university and Miller Dunwiddie Architects, McGough Construction, Hess Roise Historical Consultants, Meyer Borgman Johnson, Michaud Cooley Erickson, INSPEC, Akiba Architects, and Kimley Horn.cite web | author= Minneapolis Heritage Preservation Commission and the Minneapolis Chapter of the American Institute of Architects | publisher= City of Minneapolis | title= 14th Annual Heritage Preservation Award Winners | url= http://www.ci.minneapolis.mn.us/hpc/preservation-awards14.asp | date= 2007 | accessdate= 2007-04-08]
Boilers, fuel and emissions
Among the "cleanest burning power plants in the country," the high temperature fires almost completely consume its fuels—
natural gas, coaland woodwaste. The plant has tested and been approved for oathull biofuel, a renewable resourcethat would reduce each student's fees by about $21.
boilers are operational. A new fluidized bed boiler (CFB) is six stories high and capable of burning coal, wood, oat hulls or natural gas. There are two natural gas boilers, one pulverized coal boiler that can also fire fuel oil, and a spreader stoker coal boiler, also capable of burning fuel oil and possibly oat hulls. During May and October, the periods of lowest demand, the CFB boiler is not in use.
The CFB controls
emissions of the acid gases sulfur dioxide, hydrogen chlorideand hydrogen fluorideand particulate matter (PM) with limestone injection and a fabric filter. The pulverized coal and spreader stoker boilers are equipped with dry gas scrubbers (spray dryers). Two boilers have no control equipment but have fluegas recirculation to limit nitrogren oxide emission. The plant emits almost zero sulfurand mercury.
The unloading terminal for rail cars and its conveyors are enclosed and equipped with baghouse filters. The outdoor coal bunker is shielded from the wind by concrete retaining walls.
Storage silos for ash have fabric filters.
Environmental groups including the Save Our Riverfront Coalition and Friends of the Mississippi Inc. attempted and failed to move the plant off the river in 1996. Elected officials
Phyllis Kahnand Larry Pogemiller, Arne Carlsonwho was governor of Minnesota, and Sharon Sayles Beltonwho was mayor of Minneapolis supported the move.cite web | author= Kozarek, Lynne | publisher= "The Minnesota Daily" | title= Steam plant battles continue | url= http://www.mndaily.com/articles/1997/03/04/4365 | date= March 4 1997| accessdate= 2007-04-08] Concerned about potential emissions and noise from deliveries, some neighborhood associations and a condominium developer at the nearby Pillsbury "A" Millcriticized the plant's 2005 application to amend its permit to allow tests of alternative fuels.
The Minnesota Pollution Control Agency approved use of
biomassfuels, specifically oathulls in 2006cite web | author= Morrison, Deane | title= Oat hulls approved for University steam plant | publisher= University of Minnesota | date= February 24 2006| url= http://www1.umn.edu/umnnews/Feature_Stories/Oat_hulls_OK27d_for_University_steam_plant.html | accessdate= 2007-0-4-06] but the three years necessary for testing and the approval process lost the source of the hulls. General Mills, makers of the oat cereal Cheerios, had signed a contract by then with U.S. Steelfor use in their facility on the Iron Rangein northern Minnesota.cite web | author= Gray, Angela | publisher= "The Minnesota Daily" | title= Fuel for U OK'd; now no supply | url= http://www.mndaily.com/articles/2006/02/28/67365/ | date= February 28 2006| accessdate= 2007-04-08]
* [http://www.fwc.com/ Foster Wheeler]
* [http://www.facm.umn.edu/energy.html University of Minnesota Facilities Management - Energy Management]
* [http://www.ci.minneapolis.mn.us/hpc/preservation-awards14.asp 14th Annual Heritage Preservation Award Winners]
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