E. J. Stoneman Generating Station

Last updated
E. J. Stoneman Generating Station
E. J. Stoneman Generating Station
CountryUnited States
Location Cassville, Wisconsin
Coordinates 42°42′30″N90°59′05″W / 42.70833°N 90.98472°W / 42.70833; -90.98472
StatusDecommissioned
Commission date 2 units, 1952
Decommission date
  • 2015
Owner(s) DTE Energy Services
Thermal power station
Primary fuel Wood waste [1]
Cooling source Mississippi River
Power generation
Nameplate capacity 40 MW
[ edit on Wikidata]

E. J. Stoneman Generating Station was an electrical power station located in Cassville in Grant County, Wisconsin. It was originally a coal fired facility for several decades and a biomass facility for 5 years.

Contents

History

In 1950, the E.J. Stoneman generating station (“Stoneman”) was built by Dairyland Power Cooperative ("Dairyland") placed into service. The plant was named after Erle Stoneman, a director of Grant Electric Cooperative and an original incorporator of Dairyland. In 1993, E.J. Stoneman was closed due to economic reasons. In 1996, Dairyland sold the mothballed Stoneman plant to Mid-American power, an Arkansas-based subsidiary of WPS Resources, and put Stoneman back into operation. In 2007, WPS Resources merged with a group of Illinois natural gas utilities, forming Integrys Energy. In 2008, Integrys sold Stoneman to DTE Stoneman, LLC, a non-utility subsidiary of DTE Energy. One week later, Dairyland Power announced an agreement to purchase the facility’s entire 40 MW net output from DTE upon conversion to a biomass burning plant.

Between 2008 and 2010, Stoneman was converted by facility owner DTE Energy Services from a 100% coal-burning to 100% woody biomass-burning plant. Commercial operation of the 40 MW biomass facility began on October 8, 2010. Renewable energy from the DTE Stoneman plant powered up to 30,000 homes in the Dairyland system. [2]

In 2013, the renewable energy facility was fined $150,000 by the state of Wisconsin for numerous violations of the facility air pollution control permit. [3] In 2015, it was announced that Stoneman would close by the end of the year following the termination of a power purchasing agreement with Dairyland Coop. During the five year period of biomass operation, neighbors had also complained of charcoal-like soot residue on the homes and vehicles. [4] [5] DTE cited economics of the location for the closure rather than the failure of biomass electrical generation in general. Low natural gas prices benefiting competitors and high transportation costs for biomass fuel were cited as reasons for closure. [6]

Environment

Stoneman's Electrostatic Precipitator (“ESP”) was upgraded during the conversion from a coal plant to a wood-fired biomass facility. The modifications to the ESP allow the system to collect more particulate and work more efficiently. Also installed: a Selective Non-Catalytic Reduction system (“SNCR”) to reduce NOx emissions. A continuous emission monitoring system automatically records data that are used for reports to regulatory agencies. All received fuel is screened; all fuel must comply with strict regulations. Monthly composite samples are sent to a third party lab for testing and analytics. The plant was said to be in compliance with all permits and regulations [7] despite complaints of charcoal-like soot residue by nearby residents [8] and a $150,000 fine in 2013 for not complying with clean air permits. [3]

Community

DTE Stoneman directly employed over thirty people full-time, all local residents. The plant spent millions of dollars annually in maintenance costs, largely spent with local companies. Over fifty truck drivers and other personnel were indirectly employed to support the fuel supply of the plant. Stoneman made charitable contributions spread out to over twenty-five different local organizations. Stoneman provided training and purchased equipment for the Confined Space Rescue Qualification program for the local fire department. This program benefited Cassville and surrounding communities in the event someone is trapped in a confined space, such as a grain silo or a mine.

Units

UnitCapacity (MW)CommissioningNotes
1 18 (nameplate)
15 (summer)
15 (winter) [9] 		1952 [9]
2 35 (nameplate)
35 (summer)
35 (winter) [9] 		1952 [9]

See also

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References

  1. ↑ Various types of wood waste including green wood residue from forestry and tree trimming operations, railroad ties, demolition waste and sawdust
  2. ↑ "DTE Stoneman Station". Dairynet.com. Archived from the original on June 17, 2011. Retrieved January 31, 2016.
  3. 1 2 "Cassville power plant ordered to pay judgment". Telegraph Herald. Dubuque, IA. June 5, 2013.
  4. ↑ Montgomery, Jeff (July 24, 2015). "2nd Cassville power plant closing". Telegraph Herald. Dubuque, IA.
  5. ↑ Reber, Craig (January 3, 2016). "Cassville plants power down in 2015". Telegraph Herald. Dubuque, IA.
  6. ↑ "Midwest utilities plan retirements for coal, gas, biomass power plants". Platts.com. October 14, 2015.
  7. ↑ [ dead link ]
  8. ↑ "Black soot irks residents of Cassville". Telegraph Herald. Dubuque, IA. March 22, 2014.
  9. 1 2 3 4 "Electricity Generating Capacity: Existing Electric Generating Units by Energy Source, 2008". U.S. Energy Information Administration . Retrieved 15 May 2011.
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