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Frequently Asked Questions – Coal
Questions About Coal...
How many coal-fired power plants are there in the U.S.?
To what country does the U.S. export the most coal?
From what country does the U.S. import the most coal?
What are the different types of coal prices?
Which state produces the most coal?
How large are U.S. coal reserves?
What is the average heat (Btu) content of U.S. coal?
How do I convert short tons to metric tons?
 
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Question: To what country does the U.S. export the most coal?

In 2008, the United States exported the most coal to Canada — more than 22.9 million short tons.

U.S. coal exports in the EIA Quarterly Coal Report.
Last updated: May 5, 2009
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Question: From what country does the U.S. import the most coal?

In 2008, the United States imported the most coal from Colombia — more than 26.2 million short tons.

U.S. coal imports in the EIA Quarterly Coal Report.
Last updated: May 5, 2009
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Question: What are the different types of coal prices?

The four types of coal prices are spot price, captive price, open market price, and delivered price.

Spot price is the price for a one-time open market transaction for immediate delivery purchased "on the spot" at current market rates.
Captive price is the price for coal used by the producing company or sold to affiliated or parent companies.
Open Market price is the price of coal sold on the open market to companies other than the reporting company's parent company or a subsidiary of the parent company.

Delivered price is the price of coal including transportation costs to the consuming sector.

Coal price and other data.

Last reviewed: May 25, 2009
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Question: Which States produce the most coal?

The five largest coal producing States, with production in million short tons, and share of total U.S. coal production, for 2008:

  • Wyoming: 467.64, 40%
  • West Virginia: 157.78, 13%
  • Kentucky: 120.32, 10%
  • Pennsylvania: 65.41, 6%
  • Montana: 44.79, 4%

Latest annual coal production by State.

Last updated: November 17, 2009
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Question: How large are U.S. coal reserves?

U.S. coal reserves involve three separate components: 

Recoverable coal reserves at producing mines
Estimated recoverable reserves
Demonstrated reserve base

Recoverable coal reserves at producing mines represent the quantity of coal that can be recovered (i.e. mined) from existing coal reserves at reporting mines. These reserves essentially reflect the working inventory at producing mines. In 2008, the recoverable coal reserves in the United States totaled 17,875 million short tons at producing (active) mines.

The estimated recoverable reserves include the coal in the demonstrated reserve base (see below) considered recoverable after excluding coal estimated to be unavailable due to land use restrictions or currently economically unattractive for mining, and after applying assumed mining recovery rates. See the EIA Glossary for criteria. In 2008, the estimated recoverable reserves totaled 261,573 million short tons.

The demonstrated reserve base is composed of coal resources that have been identified to specified levels of accuracy and may support economic mining under current technologies. The demonstrated reserve base includes publicly-available data on coal that has been mapped and verified to be technologically minable. See the EIA Glossary for criteria. For 2008, the demonstrated reserve base was estimated to contain 487,678 million short tons.
Coal reserves by State
Last updated: November 17, 2009
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Question: What is the average heat (Btu) content of U.S. coal?

In 2008, the average heat content or British thermal unit (Btu) value of U.S. coal consumed in the United States was 19.988 million Btu per short ton.

Heat content of coal 1949–2008

Last updated: July 29, 2009
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Question: How do I convert short tons to metric tons?

Convert short tons to metric tons by multiplying the number of short tons by 0.907184
For example: 12,300 short tons X 0.907184 = 11,158 metric tons.

Convert metric tons to short tons by multiplying the number of metric tons by 1.10231
For example: 11,158 metric tons X 1.1023 = 12,300 short tons.

Energy Conversion Calculators

Metric and Other Physical Conversion Factors

Last reviewed: November 17, 2009
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