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Xcel's Southwestern Public Service coal generation mix at 14% in April: filing


Utility burned $5.54 million worth of PRB coal

Coal plants generated 304,189 MWh in April

Houston — Southwestern Public Service Company's coal generation mix was at 14.01% in April, while its natural gas/oil mix was at 23.4%, according to a regulatory filing published Wednesday.

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The utility, a subsidiary of Xcel Energy, said to the Public Utility Commission of Texas it burned $5.54 million worth of Powder River Basin coal in April at its 1,018-MW Harrington coal-fired power plant in Amarillo and its 1,065-MW Tolk Station in Muleshoe.

The two plants generated 304,189 MWh of power in April, or 3.38 million MMBtu, while operating at a 20.28% capacity factor. The company's six gas/oil plants generated 508,043 MWh of power, or 5.69 million MMbtu, at a 32.34% capacity factor.

On a cost per MMBtu basis, the coal plants were at $1.64/MMBtu, while the gas plants were at 36 cents/MMBtu, while the average dispatch price for coal was $18.22/MWh, compared with $4.08/MWh for gas/oil.

In April, Southwestern Public Service bought 184,989 st of coal from Tuco Inc., a coal supplier. Over 67%, or 125,298 st, of the 8,825 Btu/lb coal went to the Harrington plant, while the remaining 59,691 st of 8,825 Btu/lb coal went to the Tolk Station.

On an MMBtu basis, the company bought over 3.3 million MMBtu of coal in April, while gas purchases totaled 5.76 million MMBtu.

In 2018, Southwestern Public Service bought 4.87 million st of 8,894 Btu/lb PRB coal at an average delivered cost of $28.97/st, according to data from the US Energy Information Administration. The Harrington plant took delivery of 2.81 million st at an average price of $25.67/st, while 2.06 million st was shipped to the Tolk Station at $32.27/st.

The coal, which was also supplied by Tuco, came from three mines -- Black Thunder, Antelope, and North Antelope Rochelle -- located in Wyoming, according to the data.

-- Tyler Godwin,

-- Edited by Pankti Mehta,