Analysis of the potential for a coal-fired power plant to cause visibility impairment in a National Park

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The visibility analysis examined potential impacts of the Healy Clean Coal Project (HCCP), a proposed 50-MW coal-fired power plant to be built adjacent to the existing 25-MW Healy Unit 1 (a conventional pulverized-coal unit) in Healy, Alaska, about 6 km north of Denali National Park. The analysis used the PLUVUE I visibility model to calculate ambient concentrations of species in the plume with potential to cause visible effects. The optical effects were determined in separate calculations when the sun was within about 10 {degree} of the horizon, in the winter. Results indicated that almost all the potential impact would be ... continued below

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13 p.

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Richards, L.W. & Miller, R.L. June 1, 1995.

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The visibility analysis examined potential impacts of the Healy Clean Coal Project (HCCP), a proposed 50-MW coal-fired power plant to be built adjacent to the existing 25-MW Healy Unit 1 (a conventional pulverized-coal unit) in Healy, Alaska, about 6 km north of Denali National Park. The analysis used the PLUVUE I visibility model to calculate ambient concentrations of species in the plume with potential to cause visible effects. The optical effects were determined in separate calculations when the sun was within about 10 {degree} of the horizon, in the winter. Results indicated that almost all the potential impact would be caused by NO{sub x}. Analysis of the number of daytime hours per year that the HCCP plume would be perceptible from the Visitor Access Center, shows that the predicted number of hours is extremely low for the base case: 2 hours for the north sight path, 2 hours for the south sight path, and a total of 2 hours. Sensitivity analysis shows more sensitivity to changing the perceptibility threshold than extending the sight paths. Cumulative visibility impacts of air emissions resulting from the simultaneous operation of the HCCP and Healy Unit No. 1 were also evaluated; results show that the percentage of hours affected is much less than 1% of daytime hours during the year.

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13 p.

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OSTI as DE95012900

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  • Air and Waste Management Association meeting, San Antonio, TX (United States), 18-23 Jun 1995

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  • Other: DE95012900
  • Report No.: CONF-950646--19
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 64267
  • Archival Resource Key: ark:/67531/metadc690135

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  • June 1, 1995

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  • Aug. 14, 2015, 8:43 a.m.

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  • Jan. 21, 2016, 3:25 p.m.

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Richards, L.W. & Miller, R.L. Analysis of the potential for a coal-fired power plant to cause visibility impairment in a National Park, article, June 1, 1995; Tennessee. (digital.library.unt.edu/ark:/67531/metadc690135/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.