DOE/EIA-0529(97)

Distribution Category UC-950

U.S. Coal Reserves:

1997 Update

February 1999

Energy Information Administration

Office of Coal, Nuclear, Electric and Alternate Fuels

Office of Integrated Analysis and Forecasting

U.S. Department of Energy

Washington, DC 20585

This report was prepared by the Energy Information Administration, the independent statistical and analytical

agency within the Department of Energy. The information contained herein should not be construed as

advocating or reflecting any policy position of the Department of Energy or of any other organization.
ii Energy Information Administration/ U.S. Coal Reserves:1997 Update

Internet Access

The databases in this report can be accessed and downloaded via the EIA home page: 

( http://www.eia.doe.gov.

( Click on “Coal”

( Databases and Files Menu & locate “Coal Reserves Data Base for 1997"

Contacts

This report was prepared in the Coal and Electric Data

and Renewables Division, Office of Coal, Nuclear, Electric and Alternate Fuels. General information regarding

this publication may be obtained from Willie Hong,

Team Leader, Coal Information Team (202/426-1126). 

Questions and comments regarding the preparation and

content of the report and specific questions on coal

resources, demonstrated reserve base, estimated recoverable reserves, and coal classification should be

directed to:

Richard F. Bonskowski

Energy Information Administration, EI-52

U.S. Department of Energy

Washington, DC 20585

Telephone Number: (202)426-1132

Internet E-Mail: rbonskow@eia.doe.gov
Energy Information Administration/ U.S. Coal Reserves:1997 Update iii

Preface

Section 205(a)(2) of the Department of Energy Organization Act of 1977 (Public Law 95-91) requires the

Administrator of the Energy Information Administration

(EIA) to carry out a central, comprehensive, and unified

energy data information program to collect, evaluate, assemble, analyze, and disseminate data and information

relevant to energy resources, reserves, production, demand, technology, and related economic and statistical

information.

This report, U.S. Coal Reserves: 1997 Update, is the fourth

in series of “U.S. Coal Reserves” reports. It presents

State-level estimates of domestic coal reserves, which

may be used in the analysis and forecasting of future

coal supply. This report briefly describes the data,

methods, and assumptions used to develop such estimates and explains terminology related to recent data

programs. In addition, it provides documentation for revisions and adjustments since the previous report to the

demonstrated reserve base (DRB) of coal in the United

States and for coal quality and reserve allocations. The

resulting data are supplied for general use by the public.

The January 1995 database on recoverable coal reserves

located at active mines, which was included in the previous report, is not part of this update. Reserves at

active mines are still reported in EIA’s Coal Industry

Annual series, but not the estimated distribution of rank

and sulfur content in those reserves. EIA no longer

maintains the coal supply analysis model that used and

refined those data to evaluate the areas and magnitude

of anticipated investment in new mining capacity.

The legislation that created EIA vested the organization

with an element of statutory independence. EIA's

responsibilities are to provide timely, high-quality information and to perform objective, credible analyses in

support of deliberations by both public and private

decisionmakers. EIA does not take positions on policy

questions. Accordingly, this report does not purport to

represent the policy positions of the U.S. Department of

Energy or of the Executive Branch.
Energy Information Administration/ U.S. Coal Reserves:1997 Update v

Contents

Page

Highlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

1. EIA Coal Reserves Data ........................................................................ 1

The Demonstrated Reserve Base ............................................................... 1

Coal Resource Data Framework ................................................................ 4

Recent Developments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2. New Coal Resource and Reserve Data in Illinois .................................................. 7

Overview .................................................................................. 7

Study Area ................................................................................. 9

Methodology and Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Coal Accessibility Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Recovery Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3. 1997 Demonstrated Reserve Base and Estimated Recoverable Reserves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Demonstrated Reserve Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Estimated Recoverable Reserves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Status of Coal Reserves Data Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Acronyms and Abbreviations Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Glossary of Selected Coal Classification Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Appendix

A. Detailed Estimates of Demonstrated Reserve Base and Estimated Recoverable Reserves for

U.S. Coal by Heat and Sulfur Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
vi Energy Information Administration/ U.S. Coal Reserves:1997 Update

Tables Page

1. Estimates of the Demonstrated Reserve Base and Estimated Recoverable Reserves of Bituminous Coal in

Illinois by Btu/Sulfur Range and Type of Mining ................................................... 8

2. Reliability Classifications for Coal Resources in Illinois . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3. Categories of Coal Seam Thickness in Illinois . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4. Categories of Overburden Thickness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

5. Factors Considered and Applied in Illinois to Estimate the Accessible Reserve Base . . . . . . . . . . . . . . . . . . . . . 13

6. Demonstrated Reserve Base of Coal in the United States, 1995, 1997 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

7. Demonstrated Reserve Base of Coal by State and Rank, 1995, 1997 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

8. Demonstrated Reserve Base of Coal by State and Potential Method of Mining, 1995, 1997 . . . . . . . . . . . . . . . . 18

9. Demonstrated Reserve Base of Coal by State and Rank, Potentially Minable by Underground Methods, 

1995, 1997 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

10. Demonstrated Reserve Base of Coal by State and Rank, Potentially Minable by Surface Methods,

1995, 1997 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

11. EIA Sulfur Content Categories for Coal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

12. Demonstrated Reserve Base of Coal in the United States by Sulfur Range and Coal-Producing Region . . . . . 22

13. Net Accessibility and Recovery Factors for Coal Resources, by Coal-Producing Region . . . . . . . . . . . . . . . . . . 23

14. Estimated Recoverable Reserves of Coal in the United States by Sulfur Range and Major Region . . . . . . . . . . 24

15. Status of 1997 Database Updates for Energy Information Administration (EIA) Coal Resource

and Reserve Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

A1. Estimates of the Demonstrated Reserve Base of Coal by Btu/Sulfur Range, State, and Type of Mining . . . . . 37

A2. Estimated Recoverable Reserves of Coal by Btu/Sulfur Range, State, and Type of Mining . . . . . . . . . . . . . . . 49

Figures

1. Coal-Bearing Areas of the United States .......................................................... 3

2. Delineation of U.S. Coal Resources and Reserves ................................................... 5

3. Coal-Bearing Areas of Illinois ................................................................... 9
Energy Information Administration/ U.S. Coal Reserves:1997 Update vii

Appalachia

Interior

West

All Regions

0 100 200 300 400 500 600

(20) 37

(23) 45

(12) 26

(10) 18

(1) 2

(9) 12

(88) 142

(58) 140

(85) 141

Billion Short Tons

High Sulfur

Medium Sulfur

Low Sulfur

DRB

Estimated Recoverable 

Reserves Total

Coal-Producing Region

(55) 86

(55)108

(69)160

(151) 240

(275) 508

Data Key: DRB Tonnage (Recoverable 

Reserve Component)

(90) 197

(100) 170

Figure HL1. Demonstrated Reserve Base of Coal and Estimated Recoverable Reserves in the

United States by Sulfur Content and Coal-Producing Region as of January 1, 1997

 Note: In each bar the entire length represents the demonstrated reserve base (DRB), and the segment of the bar on the left

represents estimated recoverable reserves.

 Source: Energy Information Administration estimates.

Highlights

Demonstrated Reserve Base

This report, U.S. Coal Reserves: 1997 Update, contains

updates to the coal resource and reserve data maintained by the Energy Information Administration (EIA).

The demonstrated reserve base (DRB) of coal, first

published in 1974, is an internally compatible subset of

U.S. coal resource data which comprise the documented,

in-place coal resources where, based on coalbed thickness and depth, mining is more likely to occur. Key

DRB data include the following:

8 The new national estimate of DRB coal

resources remaining as of January 1, 1997, is 508

billion short tons (Figure HL1). Expressed in

rounded numbers, this is an increase of 12 billion

short tons from the previous (1995) DRB estimate

of 496 billion short tons. Although the DRB is

more than 466 times U.S. coal production in 1997,

all the coal in the DRB cannot be recovered.

Almost half the DRB is either inaccessible or likely

to be lost in the mining process.

8 The increase in the DRB is attributable to major

revisions in a single State: Illinois. The DRB for

Illinois increased by more than 15 billion short

tons, based on resource data not previously

mapped and analyzed for use in the DRB. This is
viii Energy Information Administration/ U.S. Coal Reserves:1997 Update

Appalachia

Interior (with

Gulf Coast)

West

Figure HL2. Coal-Producing Regions

 Note: Delineations depict only boundaries between

regions. Actual coal production originates from coal-bearing

areas (not shown) within each region. For more information,

see Table 13.

 Source: Energy Information Administration.

in addition to 12 billion short tons of coal

resources added to the 1995 Illinois DRB 2 years

ago, in the first phase of revisions.

8 The 15 billion short ton increase in the DRB

between 1995 and 1997 was partly offset by more

than 3 billion short tons of depletion nationwide

during the same period.

8 Nearly half the DRB is found in the West (see

Figure HL2). Coal resources recoverable by

surface mining make up almost one-third of the

DRB, more than half of which (58 percent) occurs

in the West. Two-thirds of the DRB is minable

only by underground mining, and more than half

of that amount (58 percent) is found in the Interior

and Appalachian Coal-Producing Regions. Overall, recovery of about 54 percent of the coal in the

DRB is projected for surface and underground

mining combined.

8 The quantities of low-sulfur, medium-sulfur,

and high-sulfur coals in the DRB are relatively

equivalent (Figure HL1). Nationwide, low-sulfur

coal is estimated to amount to 170 billion short

tons, or 33 percent of all coal included in the DRB.

Medium-sulfur coal accounts for 28 percent of the

DRB and high-sulfur coal for 39 percent.

8 Most low-sulfur coal (84 percent) and mediumsulfur coal (61 percent) in the DRB is found in

the West. Most of the high-sulfur coal in the DRB

(71 percent) is in the Interior region.

Estimated Recoverable Reserves

EIA's estimated recoverable reserves of coal equate to

the calculated amount of coal believed to be recoverable

from the DRB is in the United States. Estimated

recoverable reserves are the quantities of DRB coal that

may be recoverable, based on regional estimates of coal

resource accessibility and mining recovery rates.

Estimated recoverable reserves, which usually are

assigned the same Btu and sulfur content as the DRB

from which they were extracted, have the following

characteristics:

8 The estimated recoverable reserves of coal in the

United States include 275 billion short tons

(Figure HL1). Their distribution by low-,

medium-, and high-sulfur levels may differ

somewhat from the profile of their DRB source

data because of regional differences in resource

accessibility, geology, and recovery rates.

8 Estimated low-sulfur recoverable reserves make

up the largest part of the total, at 36 percent.

Estimated medium- and high-sulfur recoverable

reserves account for 31 and 33 percent, respectively. This distribution by sulfur content is

somewhat transposed from that for the DRB,

where high-sulfur coal accounts for the largest

part of the total (39 percent).

8 Higher recovery rates are projected for the lowsulfur surface-minable reserves concentrated in

the West than for the underground reserves in

the Interior and Appalachia, where more of the

coal must be mined underground and cleaned.
Energy Information Administration/ U.S. Coal Reserves:1997 Update 1

1 Energy Information Administration, Estimation of U.S. Coal Reserves by Coal Type: Heat and Sulfur Content, DOE/EIA-0529

(Washington, DC, October 1989). 2 Energy Information Administration, U.S. Coal Reserves: An Update by Heat and Sulfur Content, DOE/EIA-0529(92) (Washington, DC,

February 1993). 3 Energy Information Administration, U.S. Coal Reserves: A Review and Update, DOE/EIA-0529(95) (Washington, DC, August 1996). 4 Energy Information Administration, Annual Energy Outlook, DOE/EIA-0383 (various years) (Washington, DC). 5 U.S. Department of the Interior, Bureau of Mines, Mineral Industry Surveys, "Demonstrated Coal Reserve Base of the United States

on January 1, 1974" (Washington, DC, June 1974).

1. EIA Coal Reserves Data

This report is the fourth in a series published by the

Energy Information Administration (EIA) to provide

data on coal resources and reserves (see “Important

Terminology” box) allocated by estimated ranges of heat

and sulfur content. EIA’s estimated recoverable reserves

are derived from the demonstrated reserve base (DRB)

of coal in the United States (see DRB discussion in next

section) by applying adjustments for the percentages of

the DRB expected to be accessible, and then for the percentages of the accessible DRB expected to be recoverable by surface and underground mining. The

usual understanding of the term “reserves” as referring

to quantities that can be recovered at a sustainable profit

cannot technically be extended to EIA’s estimated recoverable reserves because economic and engineering

data to project mining and development costs and coal

resource market values are not available. EIA’s recoverable reserves at active mines, about which EIA is

authorized to collect simple tonnage and recovery rate

estimates in its annual Coal Production Report survey, rely

on mine operator estimates, and cannot be classified as

to geologic assurance (see “Measured Resources” in

“Important Terminology” box).

Originally developed for use in EIA coal supply models,

the data in the first report1

 (1989) were published to

broaden communication with the public on the available

data and analyses of coal resources and their characteristics and to refine estimates of the resources that may be

recoverable and suitable for future needs. The second

report,2

 published in 1993, included new State data in

major portions of Ohio and Wyoming, resulting in

significant revisions. It also contained EIA revisions in

the Pennsylvania anthracite coal fields and Btu/sulfur

range allocations for the DRB in parts of 10 other, nonproducing States. For the first time, coal quality and recoverability estimates were available for all States with

DRB data. The third report,3

 released in 1996, revised

data in New Mexico, Illinois, and Eastern Kentucky and

documented the increasing cooperation among EIA, the

U.S. Geological Survey, and State geological agencies in

order to share data and coordinate efforts in their coal

resource and reserve programs. This report (the fourth)

incorporates additional new resource data in Illinois and

applies depletion adjustment through January 1, 1997.

The DRB is the only publicly available, nationwide data

file of the quantities of minable coal conforming to a

unified set of criteria. The DRB provides the basic input

for numerous coal and energy analysis and forecasting

models&both government and private. These include

the National Energy Modeling System (NEMS), EIA's

integrated energy forecasting system. The NEMS

forecasts are the basis for EIA's Annual Energy Outlook4

and are used to answer congressional and executive

department requests and ad hoc analyses. The DRB is

also used in commercial models, such as ICF,

Incorporated's Coal and Electric Utility Model.

The Demonstrated Reserve Base

The in-place coal resources in the United States, including the DRB and the identified and undiscovered

resources, occur primarily as tabular deposits, or

“coalbeds,” within the rocks in certain coal-bearing areas

(Figure 1).

The DRB predates the estimated recoverable reserves

database and was originally devised to impart a uniform

set of definitions and criteria and replace the compilations of variously defined coal reserve and resource data

in Federal and State studies available in the 1950's and

1960's. Engineers and geologists at the U.S. Bureau of

Mines (BOM) inaugurated the DRB in 1974.5

 They

selected geologic reliability criteria (“measured” and

“indicated”) that included only resources based on

multiple field measurements or resource extensions
2 Energy Information Administration/ U.S. Coal Reserves:1997 Update

6 U.S. Bureau of Mines, The Reserve Base of U.S. Coals by Sulfur Content: Part 1, The Eastern States, Information Circular 8680 (Washington,

DC) and U.S. Bureau of Mines, The Reserve Base of U.S. Coals by Sulfur Content: Part 2, The Western States, Information Circular 8693

(Washington, DC, 1975). The first DRB determined by the BOM was improperly labeled as the 1974 DRB; actually, it was estimated for 1971,

and subsequent DRB updates by the EIA reflect depletion adjustments from 1971.

Important Terminology: Resources, Reserves, and the DRBa

“Resources" are naturally occurring concentrations or deposits of coal in the Earth's crust, in such forms and amounts that

economic extraction is currently or potentially feasible. 

“Measured resources” refers to coal for which estimates of the rank and quantity have been computed to a high degree of

geologic assurance, from sample analyses and measurements from closely spaced and geologically well known sample sites.

Under the U.S. Geological Survey (USGS) criteria, the points of observation are no greater than 1⁄2 mile apart (see Figure A1).

Measured coal is projected to extend as a 1/4-mile-wide belt from the outcrop or points of observation or measurement.

“Indicated resources” refers to coal for which estimates of the rank, quality, and quantity have been computed to a moderate

degree of geologic assurance, partly from sample analyses and measurements and partly from reasonable geologic projections.

Under the USGS criteria, the points of observation are from 1⁄2 to 11⁄2- miles apart (see Figure A1). Indicated coal is projected

to extend as a 1⁄2-mile-wide belt that lies more than 1⁄4mile from the outcrop or points of observation or measurement.

 

“Demonstrated resources” are the sum of measured resources and indicated resources.

“Demonstrated reserve base” (DRB) (or just “reserve base” in USGS usage) is, in its broadest sense, defined as those parts

of identified resources that meet specified minimum physical and chemical criteria related to current mining and production

practices, including those for quality, depth, thickness, rank, and distance from points of measurement. The “reserve base” is

the in-place demonstrated resource from which reserves are estimated. The reserve base may encompass those parts of a

resource that have a reasonable potential for becoming economically recoverable within planning horizons that extend beyond

those which assume proven technology and current economics.

“Inferred resources” refers to coal of a low degree of geologic assurance in unexplored extensions of demonstrated resources

for which estimates of the quality and size are based on geologic evidence and projection. Quantitative estimates are based on

broad knowledge of the geologic character of the bed or region where few measurements or sampling points are available and

on assumed continuation from demonstrated coal for which there is geologic evidence. The points of measurement are from

11⁄2 to 6 miles apart (Figure A1). Inferred coal is projected to extend as a 21⁄4-mile-wide belt that lies more than 3⁄4 mile from the

outcrop or points of observation or measurement. Inferred resources are not part of the DRB.

“Recoverable” refers to coal that is, or can be, extracted from a coalbed during mining.

“Reserves” relates to that portion of demonstrated resources that can be recovered economically with the application of

extraction technology available currently or in the foreseeable future. Reserves include only recoverable coal; thus, terms such

as “minable reserves,” “recoverable reserves,” and “economic reserves” are redundant. Even though “recoverable reserves”

is redundant, implying recoverability in both words, EIA prefers this term specifically to distinguish recoverable coal from in-ground

resources, such as the demonstrated reserve base, that are only partially recoverable.

“Minable” refers to coal that can be mined using present-day mining technology under current restrictions, rules, and regulations.

 aFor a full discussion of coal resources and reserve terminology as used by EIA, USGS, and BOM, see U.S. Coal Reserves, 1996,

Appendix A, “Specialized Resource and Reserve Terminology.”

 Sources: U.S. Department of the Interior, Coal Resource Classification System of the U.S. Bureau of Mines and the U.S. Geological

Survey, Geological Survey Bulletin 1450-B (1976). U.S. Department of the Interior, Coal Resource Classification System of the U.S.

Geological Survey, Geological Survey Circular 891 (1983) U.S. Department of the Interior, A Dictionary of Mining, Mineral, and Related

Terms, Bureau of Mines (1968).

corroborated by measurements, within defined study

areas. Further, for the 1974 DRB, the BOM used

information from field personnel and coal mining

specialists and it applied engineering judgment to derive

what has turned out to be a one-time national assessment at the county/coalbed level.6

 Working with the

thickness categories common to contemporary coal

assessments, they selected as minability criteria those

broad ranges of coalbed thickness and overburden

thickness that encompassed most commercial mining.
Energy Information Administration/ U.S. Coal Reserves:1997 Update 3

7 Energy Information Administration, Coal Production, DOE/EIA-0118 (Washington, DC, various years).

RI

WI

B S

S

S B

S

L

L

A

BB

S

L

B

S

B

L

L L

L

L

S

S

S

S

L

S

L

S

B

S

S

S

S

S

S L

L L

L

L

L

L

L L

L

L

L L

L

L

L L L

L

L

L L L

L

L

L

L

L

S

B

L

L L L

L L L

L

L

L

S

B

B

S

L

L L

L L

L

L L

L

L

S

WA

ID

MT

NE

OR

UT

CA NV

AZ

NM

CO

WY

TX

OK

KS

AR

LA

MO

IA

SD

ND

MN

IL MI

IN OH

KY

TN

MS

AL GA

SC

NC

B

B

VA

PA

NY VT

NH

MA

NJ

DE

ME

AK B B

B

FL

B L L L L

L

S S

L

S

L

B B B

B

B

B

L L

L

L S

S B B

L

A

S

S

L

S B

A

B

S

B L

L L

L

L

S

B

B

BB A S B

S

B

A

L

B

SCALE OF ALASKA ONE HALF THAT

OF CONTIGUOUS UNITED STATES

100 0 100 200

SCALE IN MILES

Lignite

RANK

SMALL FIELD

OR ISOLATED

OCCURRENCE1

Bituminous Coal

Anthracite2 A

B

S

L

FIELD

Subbituminous Coal

MI

MD

CT

200 0 200 400

SCALE IN MILES

WV

L

L

L L L L

L L

L L

L L L

L L

L

L

L

L

LL

L L

L

L

B A

B

B

S

B

B

A

L

L

L L

L

L

L

L

L

L

L

L

L

L

L L

L

L L L

L

L

B

Figure 1. Coal-Bearing Areas of the United States

 Sources: United States Geological Survey, Coalfields of the United States, 1960-1961; Texas Bureau of Economic Geology,

Lignite Resources in Texas, 1980; Louisiana Geological Survey, Near Surface Lignite in Louisiana, 1981; Colorado Geological

Survey, Coal Resources and Development Map, 1981; and Mississippi Bureau of Geology, 1983.

For a discussion of the significance of the data and

criteria on updates of the DRB and related databases, see

Appendix A of the 1996 U.S. Coal Reserves report.

The EIA assumed responsibility for the DRB and for coal

reserves data in 1977, when DOE was established.

Between 1983 and 1993, EIA published annual updates

to the DRB in its annual Coal Production reports.7

Because of differences between DRB data and the

production data as reported by coalbeds the EIA updates could be maintained only at the State level, by coal

rank and type of mining. Some State updates by EIA

incorporated new resource data by coalbed, but it was

not feasible to maintain the national DRB at the coalbed

level. DRB updates during the 1980s also broadened

criteria in locations where evidence showed that coal

was being mined from beds thinner or deeper than the

standards (Appendix A, 1996 U.S. Coal Reserves report).
4 Energy Information Administration/ U.S. Coal Reserves:1997 Update

In 1990, EIA initiated the Coal Reserves Data Base

(CRDB) program, to help meet the growing need for

new sources of data for U.S. coal reserves estimates.

Years of unpublished mapping data and coal quality

data from various sources were being warehoused at

State geological surveys in a wide range of formats. In

order to promote the processing, analysis, and promulgation of such data, EIA encourages active participation

of State surveys in the CRDB program.

The resulting CRDB coal resource estimates include the

DRB, along with accessibility adjustments, estimated

recoverable reserves (recoverable coal), and allocations

by Btu, sulfur, and ash content using coal quality data

that are coordinated with mapped resources.

Coal Resource Data Framework

The DRB is part of a larger system of coal resource data

and EIA's estimates of coal reserves are part of a

hierarchy of U.S. Government coal resource assessment

data (Figure 2). The U.S. Geological Survey (USGS)

performs mapping and field studies required to

calculate identified coal resources, and it may estimate

undiscovered resources from extensions of available

data, based on known geologic information. State

geological surveys also may map coal resources, and

many do so in cooperation with the USGS and have

adopted USGS criteria as their standards.

EIA's objective is to develop reliable data on coal

reserves, but the coal reserves data EIA is authorized to

collect from the coal industry are too limited for mid- or

long-term analyses. To supply a broader national

database of coal reserves, EIA analyzes coal resource

data&primarily the DRB, but also the other measured,

indicated, and inferred resource categories from which

the DRB might be derived. EIA develops the estimated

recoverable reserves from the DRB and from data on

coal accessibility and recoverability. The USGS and State

geological surveys estimate identified resources (which

include measured and indicated resources from which

the DRB may be derived, as well as resources currently

too thin or too deep to include in the DRB) and inferred

resources, also not included in the DRB. Finally, the

undiscovered resources estimated by the USGS, along

with identified resources, constitute the comprehensive

“total resources” classification (Figure 2).

Although all the data represented in Figure 2 are

interrelated conceptually, in practice they cannot be

maintained uniformly. The recoverable reserves at active

mines are updated annually but they represent only a

fraction of the reserves controlled by major mining

companies. EIA treats recoverable reserves at active

mines as though they constitute a portion of its

estimated recoverable reserves. In reality, some of the

data at mines may incorporate reserves located beyond

the coverage of the DRB and EIA’s estimated

recoverable reserves. The mine data EIA receives are not

detailed enough to allow comparative analysis.

Further, the data for reserves at active mines are clearly

more timely than the broader resource studies from

which estimated recoverable reserves are derived.

Similarly, the DRB data are derived from more recent

sources in many areas than were available when the

USGS compiled identified resources and total resources

as of 1974. Thus, in Figure 2, the data for active mines

are generally more current than the DRB and its

associated recoverable reserve estimates, which are in

turn more up to date than much of the total resource

data. Under current planning, there is little likelihood

that total resources of coal will be updated by the USGS

in the near future.

Recent Developments

By definition, the DRB does not represent all the coal in

the ground. It represents coal that has been mapped,

that meets DRB reliability and minability criteria, and

for which the data are publicly available. In some areas,

the available source data for the DRB are old, and there

may be evidence that some coal being mined is not

covered in the DRB. In such cases, the DRB is presently

out of date. As new data become available, those coal

resources are revised via the CRDB program as new

data become available. It is considered evidence that

resource data and the DRB are out of date if reserves

being mined supersede in quantity, location, or physical

parameters the resources that have been demonstrated

using available data. In isolated cases of this kind, EIA

has selectively included inferred coal resources, not in

the DRB, but in the data base used to develop certain

coal supply forecasts.

Inferred coal resources are not listed in this report

because they are less reliable than the DRB and because

the coverage of inferred data is not consistent from one

State to another. Recent CRDB studies include updated

DRB and inferred resources and they extend allocations

and analyses to the inferred if supported by the geologic

evidence. Even though inferred data are not published

by EIA, they are retained on file to supply information

about mining potential in important areas.
Energy Information Administration/ U.S. Coal Reserves:1997 Update 5

 Notes: Resources and reserves data are in billion short tons. Darker shading in the diagram corresponds to greater relative data reliability.

The estimated recoverable reserves depicted near the top of the diagram assume that the 19 billion short tons of recoverable reserves at

active mines reported by mine operators to the Energy Information Administration (EIA) are part of the same body of resource data. This

diagram portrays the theoretical relationships of data magnitude and reliability among coal resource data. All numbers are subject to

revision with changes in knowledge of coal resource data.

 Sources: The DRB estimate was compiled by the EIA as of January 1, 1997. Estimated recoverable reserves were compiled in EIA's

Coal Reserves Data Base (CRDB) program. Recoverable reserves at active mines were reported in EIA’s Coal Industry Annual, 1996.

Identified resources and total resources are estimates as of January 1, 1974, compiled and published by the U.S. Geological Survey in Coal

Resources of the United States, January 1, 1974.

Since EIA’s previous report, in 1996, data have been

incorporated from Part 2 of the Illinois CRDB study,

completed in March 1997 (described in the next section).

A cooperative agreement is under way with the

Colorado Geological Survey to revise coal resource

estimates and update the CRDB in the two leading

coalfields in Colorado. Results from the Uintah coalfields were completed in July 19988

 and updates for the

Yampa field are due by May 1999. A coal reserves

update study in Utah, in cooperation with the Utah

Geological Survey, started up in December 1997. New

resource and reserve estimates for the major producing

areas in the Book Cliffs and Wasatch Plateau coalfields

are scheduled for completion by August 1999. 

(VWLPDWHG

5HFRYHUDEOH

5HVHUYHV

'HPRQVWUDWHG 5HVHUYH

%DVH 0HDVXUHG DQG

,QGLFDWHG 6SHFLILHG

'HSWKV DQG 7KLFNQHVVHV

,GHQWLILHG 5HVRXUFHV

0HDVXUHG ,QGLFDWHG

DQG ,QIHUUHG

7RWDO 5HVRXUFHV

,GHQWLILHG DQG

8QGLVFRYHUHG

5HFRYHUDEOH 5HVHUYHV DW

$FWLYH 0LQHV 

Figure 2. Delineation of U.S. Coal Resources and Reserves

(Billion Short Tons as of January 1, 1997)
6 Energy Information Administration/ U.S. Coal Reserves:1997 Update

8 The new Colorado data are being reviewed and processed. They are not included in the present update.

EIA has obtained valuable new accessibility and recoverability data for recent coal reserve estimates from the

USGS Coal Availability Studies (CAS) and from the

BOM Coal Recoverability Studies (CRS) conducted

before the Bureau of Mines was shut down. The USGS,

recognizing the value of the CRS to complement its

availability studies with economic mining feasibility

data, included a small CRS program in its current

operations. As discussed later, EIA has also adopted

some of the CAS criteria for “restricted resources” in its

own accessibility adjustments. This allows the DRB

criteria to remain constant while using accessibility

factors to update local coal minability restrictions.

The USGS is also proceeding with its National Coal

Resource Assessment (NCRA)&a project running from

1995 to 1999 to update basic U.S. coal resources data.

The NCRA is incorporating new data in a systematic

study of designated major coal deposits: specifically of

those coalbeds expected to produce the majority of U.S.

coal for the next 25 to 30 years. It does not attempt to

compile the data necessary for a new estimate of total

U.S. coal resources, which would currently be beyond

the scope of any fundable Federal project. When

completed, the NCRA data may serve an important role

in updating or replacing EIA’s DRB.
Energy Information Administration/ U.S. Coal Reserves: 1997 Update 7

9 Illinois State Geological Survey, Illinois Coal Reserve Assessment and Data Base Development: Final Report for Part 1, Open-File Series,

1995-11, published report prepared for the Energy Information Administration (Champaign, IL, 1995). 10 Energy Information Administration, U.S. Coal Reserves: A Review and Update, DOE/EIA-0529(95) (Washington, DC, August

1996). 11 Illinois State Geological Survey, Illinois Coal Reserve Assessment and Data Base Development: Final Report, Open-File Series, 1997-4,

published report prepared for the Energy Information Administration (Champaign, IL, 1997). 12 Energy Information Administration, Coal Production 1992, DOE/EIA-0116(92) (Washington, DC, October 1993).

2. New Coal Resource and

Reserve Data in Illinois

Overview

The identified resource, demonstrated reserve base

(DRB), and estimated recoverable reserves data for the

State of Illinois were updated in a two-part cooperative

agreement between EIA and the Illinois State Geological

Survey (ISGS). The first part was completed in November 1995 for resources in those parts of the Illinois

coalfield where new data were available that could be

fully integrated during the initial 12-month project

period.9

 Those data were incorporated in EIA’s subsequent coal reserves report and database.10 The final part

of the cooperative agreement was completed in March

1997.11 It incorporated additional new file data for

which broader analysis was required&data which might

demonstrate coal resources of low- to medium-sulfur

content or resources in areas previously without reliable

DRB estimates. Those data are incorporated via the

present report and database.

The new DRB of coal in Illinois, calculated by the ISGS

as of January 1, 1996, was 105.16 billion short tons (Table

1). This compares with 78.01 billion short tons prior to

the ISGS project (remaining DRB, as of January 1, 199312)

and with 90.05 billion short tons following the first part

of the update (remaining as of January 1, 1994).

Compared on the same remaining-year basis, the DRB

estimate in Illinois increased by more than 35 percent, or

27.4 billion short tons. EIA adjusted the new Illinois

DRB for depletion during 1996, resulting in a DRB of

105.07 billion short tons remaining as of January 1, 1997.

The new estimate includes resources revised using

recent mapping in 16 counties, as well as adjustments

throughout most of the 72 counties included in the study

for depletion due to past mining. The new estimate for

identified resources is 199 billion short tons, as compared with EIA’s previous file data totaling estimate of

181 billion short tons. These coal resource estimates are

neither ultimate nor definitive; they represent qualifying

data obtainable at reasonable cost at the time of study

for mapped coal resources in the areas and depths likely

to be minable. As with all DRB estimates, they do not

include hypothetical or inferred resources or coal

deposits too thin, too deep, or too impure to mine.

The new resource estimates incorporate analyses of

sulfur, heat content, and coal rank to characterize the

remaining coal resources in Illinois. Relevant coal quality

data were examined in conjunction with coal resource

mapping. Coal analyses from exploration drill holes and

channel samples at mines and outcrops were compiled

and mapped, along with data on geologic trends, to allocate coal resources to ranges of sulfur and heat content

and to rank group. The new allocations place almost 1

percent of the DRB of Illinois in the two lowest sulfur

categories, as compared with none in EIA's 1993 reserve

base. These allocations also place 89 percent of the DRB

in the highest sulfur category, as compared with EIA's

allocation of 69 percent in 1993.

By comparing depletion of reserves as calculated from

maps of mined areas with depletion based on reported

production and recovery rates, ISGS uncovered potential

pitfalls in estimating depletion based on reported

production alone, without adequate knowledge of mine

operations. The issues include production data reported

on the basis of tipple location rather than point of extraction and depletion by underground mining of reserves

classified as surface-minable in the database. The

destruction of unmined reserves by preferential mining

of lower seams is also an important issue but it could

not be estimated from the statistics.
8 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

Table 1. Estimates of the Demonstrated Reserve Base and Estimated Recoverable Reserves of Bituminous

Coal in Illinois by Btu/Sulfur Range and Type of Mining

(Million Short Tons Remaining as of January 1, 1996)

Heat content

(million Btu

per short ton)

Sulfur Content

(pounds of sulfur per million Btu) Total

All Sulfur

< 0.40 0.41%0.60 0.61%0.83 0.84%1.24 1.25%1.67 1.68%2.50 > 2.50 Categories

Demonstrated Reserve Base

Minable from Surface

15-19.99 . . . 0.00 0.00 0.00 0.00 0.00 8.84 121.98 130.82

20-22.99 . . . 0.00 0.00 4.16 161.45 132.20 501.23 14,102.65 14,901.71

23-24.99 . . . 0.00 0.00 1.36 26.42 20.12 80.81 1,084.50 1,213.21

25-25.99 . . . 0.00 0.00 0.00 0.00 0.00 0.00 372.25 372.25

Total ...... 0.00 0.00 5.52 187.87 152.33 590.88 15,681.39 16,617.99

Minable Underground

20-22.99 . . . 199.42 683.74 1,089.46 1,660.13 1,220.92 2,439.41 48,028.67 55,321.75

23-24.99 . . . 2.44 34.08 255.55 874.93 650.75 1,509.48 28,712.89 32,040.12

25-25.99 . . . 0.00 0.00 0.00 0.00 0.00 0.00 1,167.04 1,167.04

>25.99 ..... 0.00 0.00 0.00 0.00 0.00 0.00 9.45 9.45

Total ...... 201.86 717.82 1,345.02 2,535.06 1,871.67 3,948.88 77,918.06 88,538.37

Minable Total

15-19.99 . . . 0.00 0.00 0.00 0.00 0.00 8.84 121.98 130.82

20-22.99 . . . 199.42 683.74 1,093.63 1,821.58 1,353.12 2,940.64 62,131.33 70,223.46

23-24.99 . . . 2.44 34.08 256.91 901.35 670.87 1,590.28 29,797.40 33,253.33

25-25.99 . . . 0.00 0.00 0.00 0.00 0.00 0.00 1,539.30 1,539.30

>25.99 ..... 0.00 0.00 0.00 0.00 0.00 0.00 9.45 9.45

Total ...... 201.86 717.82 1,350.54 2,722.93 2,023.99 4,539.76 93,599.45 105,156.40

Estimated Recoverable Reserves

Recoverable from Surface

15-19.99 . . . 0.00 0.00 0.00 0.00 0.00 5.22 71.18 76.41

20-22.99 . . . 0.00 0.00 2.48 110.69 87.11 303.37 8,586.19 9,089.84

23-24.99 . . . 0.00 0.00 0.70 0.72 4.46 30.94 682.05 718.86

25-25.99 . . . 0.00 0.00 0.00 0.00 0.00 0.00 226.75 226.75

Total ...... 0.00 0.00 3.18 111.41 91.57 339.53 9,566.17 10,111.86

Recoverable Underground

20-22.99 . . . 45.58 176.75 325.61 450.29 356.33 696.70 15,180.30 17,234.57

23-24.99 . . . 0.54 8.29 80.18 316.55 226.24 554.23 9,435.98 10,622.01

25-25.99 . . . 0.00 0.00 0.00 0.00 0.00 0.00 266.76 266.76

Total ...... 46.12 185.04 405.79 766.85 582.58 1,250.93 24,883.03 28,120.34

Recoverable Total

15-19.99 . . . 0.00 0.00 0.00 0.00 0.00 5.22 71.18 76.41

20-22.99 . . . 45.58 176.75 328.09 560.99 443.45 1,000.07 23,766.48 26,321.41

23-24.99 . . . 0.54 8.29 80.88 317.28 230.70 585.17 10,118.03 11,340.88

25-25.99 . . . 0.00 0.00 0.00 0.00 0.00 0.00 493.51 493.51

Total ...... 46.12 185.04 408.96 878.26 674.14 1,590.47 34,449.20 38,232.20

 Note: Data may not equal sum of components due to independent rounding.

 Source: Illinois State Geological Survey, Illinois Coal Reserve Assessment and Data Base Development: Final Report, OpenFile Series 1997-4.
Energy Information Administration/ U.S. Coal Reserves: 1997 Update 9

13 About 5 percent of the coal in the less than 42-inch category was mapped using prior criteria and includes beds as thick as 47

inches; hence it is identified in the study both as less than 42 inches and as less than 4 feet thick. 14 A drift mine typically enters the coalbed directly at a location where the coal and overlying rocks are exposed, such as a natural

hillside. In Illinois, drift mines sometimes access the coal seam via an artificial exposure, such as a “final cut” high wall, where the

overburden becomes too thick for further surface mining, or in a box-like pit excavated specifically to create an exposure surface in the

coal seam.

0 50 100

Miles

Coal-fired power plant

Coal-bearing area

Figure 3. Coal-Bearing Areas of Illinois

The January 1, 1996, accessible reserve base was

estimated at 69.56 billion short tons. EIA's previous

(January 1, 1992) accessible reserve base estimate of

56.49 billion tons excluded surface-minable coal under

prime farm land, an exclusion that is no longer considered valid. The new estimate excludes: resources

under towns, interstate highways, and public land;

underground-minable resources less than 4 feet thick; resources in small, irregular blocks between mines; and

coal allocated for barriers and small blocks left in future

mines. For underground mining, the coal accessibility

based on land use restrictions related to surface features

ranges from 42 percent to 100 percent, varying by coalbed and county. These basic accessibility rates were

further reduced to account for irregular blocks of coal

and barriers expected to be left unmined, and to exclude

coal less than 42 inches thick.13 For surface mining, a net

accessibility factor of 80 percent or less was applied to

all coalbeds and counties. This was based on these extrapolations: (1) that on average, 15 percent of future

minable coal will be inaccessible because of barriers

between mine blocks and at property boundaries and because of irregularly shaped isolated resource blocks that

cannot economically be accessed; and (2) that another 6

percent, on average, is expected to be restricted due to

land use conflicts. In addition, specific accessibilitylimiting restrictions were identified in several counties.

The ISGS is currently involved in a multiyear study

supported by the USGS to assess the availability of coal

for mining. When complete, the findings from the Coal

Availability Studies are expected to lead to additional

adjustments in the accessible reserve base.

Estimated recoverable reserves of 38.23 billion short tons

as of January 1, 1996, were calculated using recovery

factors of 50 percent for underground-minable reserves

and 70 to 85 percent (depending on location and thickness) for surface-minable coal (Table 1). These rates are

similar to the traditional 50 percent and 80 percent rates,

respectively, used previously in DRB calculations. They

were selected, however, based on data on reserves

depletion and mine production from January 1979 to

January 1996, rather than on the regional resource

depletion factors applied to the DRB and traditionally

assumed to account for inaccessible resources as well.

The revised recovery rates account both for coal that

would be lost in cleaning and handling and for coal left

as pillars or barriers in mines.

Study Area

The Illinois coalfield (Figure 1) is in the Interior Region

of the United States and contains most of Illinois (Figure

3) as well as western portions of Indiana and Kentucky.

Minable coal is found in the Pennsylvanian-age strata of

 the geologic basin. The rank of the coals is high volatile

bituminous, ranging from the A rank group at the

extreme southern margin of the basin to rank groups B

and C in the southern, central, and northern portions of

the basin. Illinois has the largest DRB of bituminous coal

and the second largest total DRB of any State.

Since the development of modern surface mining equipment, coals as deep as 150 feet have commonly been

mined by surface methods in Illinois. Large dragline and

power shovel mining or small truck and shovel operations are the primary forms of surface mining. Augering

is sometimes used to recover additional coal from the

final cut of a surface mine.Shafts and slopes are the most

common means of access to underground mines in this

region, but some mines employ a drift entrance constructed at an abandoned surface mine highwall or a

box cut.14 Partial- and high-extraction room-and-pillar

 Source: United States Geological Survey, Coalfields of

the United States, 1960.
10 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

15 Illinois State Geological Survey, Minable Coal Reserves of Illinois, Bulletin 78 (Champaign, IL, 1952) 138 pp.

 Table 2. Reliability Classifications for Coal Resources in Illinois

Class

Maximum Distance

from Datum Points*

Accepted

Datum Points Remarks

I-A Proved

(Measured)

0.5 mile Mined-out areas, Diamond drill holes,

Outcrops, Coal test geophysical logs

Approximately equivalent to

measured category of the U.S.

Geological Survey

I-B Probable

(Indicated)

2 miles All points of Class I-A plus coal-test churn drill

holes

Approximately equivalent to 

indicated category of the U.S.

Geological Survey

II-A Strongly

Indicated

(Inferred)

4 miles All points of Classes I-A and I-B plus churn

drill holes drilled for oil or water with unusually

good records, control rotary drill holes and oiltest geophysical logs

Approximately equivalent to 

inferred category of the U.S.

Geological Survey

 * Distances modified in practice by geological considerations.

 Source: Adapted from ISGS Bulletin 78, 1952.

mining and longwall mining methods are used. During

the past 20 years, production has shifted from entirely

room and pillar to more than 40 percent from longwall

operations.

Methodology and Criteria

In the early 1950s, the ISGS completed the first comprehensive survey of coal resources in the State.15 The

landmark report on the survey results, published in

1952, provided a framework and format generally followed in subsequent resource assessments. In particular,

it established reliability categories that reflect the above

average lateral continuity of most coals found in Illinois

(Table 2). The 1952 report is also the only source of

resource and reserve estimates for a few seams that have

not attracted sufficient interest to warrant revised

mapping.

The ISGS categories of reliability are comparable to those

defined by the USGS. Because of the lateral continuity of

most Illinois coals, however, the radii of influence assigned to each datum point are larger than those used by

the USGS. The ISGS categories of class I-A, I-B, and II-A

are considered equivalent in reliability to the USGS categories of measured, indicated, and inferred and had previously been accepted as such in EIA coal resource data.

Although the DRB did not exist at the time of the 1952

report, the criteria used in the study are compatible with

current DRB definitions and would indicate a DRB of 61

billion tons. Additional mapping since 1950 raised the

DRB to 78 billion tons as of January 1, 1993.

The ISGS began computerizing its coal resource mapping in the 1960s. Computers expedite merging of coal

thickness data with data on coal depth, sulfur, rank,

heating value, and mined areas, and with other information such as calculated depletion, accessibility, and

recoverability of reserves. Subsequent updates, revisions, and accessibility adjustments can also be made

more efficiently with a digital database.

Many of the coal resource maps needed for this study

were already in a digital format of some kind. For this

study, all data were combined into a common digital

map database to facilitate processing as well as to provide a suitable foundation for future updates and

revisions. All remaining paper maps were digitized into

the common database and numerous adjustments were

made to edge match and correlate all data from earlier

databases and base maps.

Resources and reserves were divided into two categories

based on the mining method most likely to be used. The

surface-minable category consists of coals that would be

mined most likely by removing the overburden to

expose and excavate the coal. The underground-minable

category consists of resources expected to be extracted

by underground methods such as room-and-pillar or

longwall mining.

The factors that determine the method used to mine a

particular deposit are primarily economic rather than

technical. The main factors are: thickness of the coal,

average stripping ratio of the mine block, nature of the

overburden material, surface ownership and land use,
Energy Information Administration/ U.S. Coal Reserves: 1997 Update 11

16 American Society for Testing and Materials, Annual Book of ASTM Standards, Section 5, Petroleum Products, Lubricants, and

Fossil Fuels, Volume 5.05: Gaseous Fuels, Coal and Coke (Philadelphia, PA, 1990).

Table 3. Categories of Coal Seam Thickness

in Illinois

Thickness Rangea

(inches)

Average Thickness

(feet)

18-28 b

2

28-42 3

42-54 4

54-66 5

66-78 6

78-90 7

90-102 8

102-114 9

 114 10

a

Thickness ranges expressed in even-inch values

represent the isopach contour lines mapped to define areas

of average thickness. Isolated thicknesses cor- responding

to the upper limit of a range are included in the next thicker

range. b

Surface-minable coal only.

Source: Illinois Coal Reserve Assessment and Data Base

Development: Final Report, Open-File Series 1997-4, 1997.

Table 4. Categories of Overburden Thickness

Underground Mining

(feet)

Surface Mining

(feet)

150-500 0-50

500-1,000 50-100

1,000-2,000 100-150

Note: Thickness ranges expressed in even-foot values

represent the isopach contour lines mapped to define areas

of average thickness. Isolated thicknesses corresponding

to the upper limit of a range are included in the next thicker

range.

Source: Illinois Coal Reserve Assessment and Data

Base Development: Final Report, Open-File Series 1997-4,

1997.

proximity to other surface features, and the capital and

previous mining experience of individual companies.

The ISGS found the 150-foot depth line to be the most

representative average delimiter between surfaceminable and underground-minable resources. In Illinois,

the ISGS defines surface-minable resources as having a

minimum thickness of 18 inches. Underground-minable

resources are defined as having a minimum thickness of

28 inches. These minimum thicknesses are based on historical mining practice in the State. For economic

reasons, seams less than 48 inches thick have not been

extensively mined underground in Illinois for the past

three decades or more; however, resources less than 48

inches thick were retained in the DRB for this study in

order to provide compatibility with current DRB estimates of other midwestern States. As explained later,

those seams are excluded from the accessible reserve

base.

The categories of coal seam thickness and overburden

thickness followed in Illinois are summarized in Tables

3 and 4. No maximum depth was established for underground-minable reserves. The deepest mapped resour

ces in the State are slightly more than 1,500 feet below

the surface. Interviews with representatives of

mining companies indicated that this depth does not

prevent mining.

The thicknesses of coal deposits were mapped using

contour lines at one-foot intervals. Coal tonnages were

calculated using a density factor of 1,800 tons per acre

per foot of coal thickness (equivalent to 1.32 specific

gravity). The mean value of the two contours defining an

area was used for this calculation. For example, the area

between the 5.5-foot and 6.5-foot isopachs was assumed

to have an average thickness of 6 feet.

Cumulative depletion of the DRB was calculated and

analyzed both using information on mined areas and

using production data and recovery factors. The results

were compiled by ISGS to update the DRB to January 1,

1996, and to provide comparative statistics on reported

production and depletion of reserves. EIA depleted the

DRB from January 1, 1996, to January 1, 1997, using EIA

production data and standard depletion factors.

Resources were allocated to EIA coal quality categories

for sulfur, rank, and calorific value. Face channel,

column, composite bench, and drill core samples were

used in this study (See “coal sampling” in Glossary).

ISGS has on file more than 4,000 analyses of Illinois coal,

the majority of which are of the face channel type. These

samples were collected and analyzed by ISGS staff, the

U.S. Bureau of Mines, or coal companies. All Illinois

coals are high-volatile bituminous. Coal rank varies

systematically with distribution and depth of the deposit

in the coal field. Rank was determined by calculating the

heating value of samples on a moist, mineral-matter-free

basis, according to formulas of Standard D388,

American Society for Testing and Materials.16 The coal

analyses were used to map million Btu per ton and

pounds of sulfur per million Btu on an as-received basis

and to assign corresponding coal resources to the

Btu/Sulfur ranges used in EIA allocations.
12 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

17 Illinois State Geological Survey, Deep-Minable Coal Resources of Illinois, Circular 504 (Champaign, IL, 1982). 18 About 5 percent of the coal in the less than 42-inch category was mapped using prior criteria and includes beds as thick as 47

inches.

Coal Accessibility Adjustments

The accessible reserve base can be described as the

portion of the DRB that can be mined at present, when

local or regional mining practice and technologies and

physical or geologic conditions are taken into account.

For recent resource studies and revisions, EIA has

broadened the concept of accessibility to include the

limiting effects of certain technological and geologic conditions. In the past, such adjustments were made in the

resource database, by the field investigator or within the

DRB derivation, and were difficult to reassess. They can

now be applied through computerized resource mapping systems and they enhance the comparability of EIA

coal accessibility and USGS coal availability. The

expanded definition has been incorporated into the

Illinois study. The accessible reserve base includes that

portion of USGS available resources that would meet

DRB criteria.

At the end of the EIA cooperative agreement, the ISGS

was in the third year of a multiyear USGS Coal

Availability Study (CAS). Five quadrangles had been

evaluated, about 20 percent of the number needed to

reliably assess availability of resources in Illinois. The

amount of coal available for mining in the sample areas

ranged from 18 percent to 61 percent of the original

resources. Technical factors such as thickness of the coal

and overlying bedrock, roof and floor conditions, faults,

and size of the mining block account for most of the

restrictions on coal availability. Land use restricts from

less than 1 percent to 16 percent of the resources in the

quadrangles studied. Although it was too early to apply

most of the initial findings of this study, some preliminary observations were incorporated into this

estimate of accessible resources. Final findings of the

CAS are expected to significantly alter the accessible

reserve base. The factors considered for estimating the

accessible reserve base are listed in Table 5.

Almost 60 percent of the 36 million acres of land in

Illinois are classified as prime farmland. EIA's estimate

of accessible coal in Illinois had excluded surfaceminable reserves in areas of prime farmland, but Illinois

surface mine regulations do not preclude mining these

areas. Further, surface mine operators in Illinois are

successfully mining and reclaiming prime farmland, and

in CAS interviews with operators, they did not consider

it a limit to reserve accessibility. For these reasons, prime

farmland was not a factor in estimating the new

accessible reserve base.

Since 1952, the ISGS had excluded areas densely drilled

for oil from its calculation of reserves. Coal mining

experts interviewed by Treworgy and Bargh in 198117

confirmed this restriction and the amount of coal

excluded (9.6 billion tons) was documented. The

thinking was that safety considerations prevent mining

coal in such areas. In the CAS, however, it was found

that mining companies no longer regard closely spaced

oil wells as an absolute barrier to mining. Although

regulations require that a barrier pillar be left around

wells, experienced mining companies have been allowed

to reduce the size of the pillar. In many cases of

abandoned wells, it has been feasible to plug the well to

meet specifications and then mine through it. The

decrease in the amount of coal recovered and/or the

increase in the cost of mining is not severe enough to

consider the reserves inaccessible.

The five CAS quadrangles completed by the end of the

Coal Reserves Data Base (CRDB) study contain about 2

percent of the underground-minable resources in the

State and include all the major seams. Six of the eight

companies operating major underground mines in the

State were interviewed. All six considered coal less than

42 inches thick as presently too thin to mine economically by underground methods. Because there are

few natural outcrops, most underground mines require

extensive exploratory and development drilling to

obtain data for mine planning and permitting and for the

construction of slopes and shafts for the movement of

air, miners, materials, and coal. To recoup these expenses, mines must produce large tonnages of low-cost coal.

Mining in thin seams requires more acreage and the

mining costs are higher. For these reasons, underground-minable reserves less than 42 inches thick18 have

been excluded from accessibility in this update.

A significant portion of inaccessible resources consists of

blocks of coal left as barrier pillars (the law requires 200

feet between mines) or simply left out because of the

geometry of the mine plan, the early abandonment of a

mine, inability to obtain land ownership or mineral

rights, or unfavorable geology. Once surrounded by

abandoned mines, these blocks are too small or irregular

to be minable. The approximate area of coal rendered

inaccessible by mining was calculated by creating a 200-

foot buffer around each mine and adding to that any

areas of coal considered to be unminable because of

small mining-area size, convoluted geometry, or proximity to mined areas. The coal tonnage in the adjusted
Energy Information Administration/ U.S. Coal Reserves: 1997 Update 13

Table 5. Factors Considered and Applied in Illinois to Estimate the Accessible Reserve Base

Factor Considered Applied? Remarks

Technical

Prime farmland . . . . . . . . . . . . No There is no evidence that prime farmland restricts access.

Areas densely drilled for oil . . . No The presence of wells does not raise costs enough to restrict access.

Barrier pillars and small

 blocks between mines . . . . . . Yes

Tonnage of existing blocks and barriers was calculated from maps.

Tonnage of blocks and barriers created by future mining was

estimated to be 15 percent of reserves otherwise accessible.

Thin coal . . . . . . . . . . . . . . . . Yes Underground-minable reserves <48 inches thick were excluded.

Land Use The tonnage of underground-minable reserves restricted by all land

use categories was estimated from previous mapping; 6 percent of all

surface-minable reserves was assumed to be inaccessible because of

land use.

Interstate highways . . . . . . . . Yes

Towns . . . . . . . . . . . . . . . . . . Yes

Cemeteries . . . . . . . . . . . . . . . Yes

Public lands . . . . . . . . . . . . . . Yes

 Source: Illinois Coal Reserve Assessment and Data Base Development: Final Report, Open-File Series 1997-4,1997.

buffer areas was calculated and excluded from the accessible reserve base.

Additional blocks will become inaccessible as mining

continues. The ISGS found that, on a county-by-county

basis, the amount of inaccessible coal ranged from 6

percent to more than 40 percent of the original resources

in mined areas, or roughly 20 percent on a Statewide

basis. Since some of this coal may have been left because

of surface features, which are accounted for separately,

it was estimated that 15 percent of the coal otherwise

qualified for the accessible reserve base will be rendered

inaccessible by future mining.

Earlier investigations have identified land uses such as

interstate highways, railroads, cemeteries, towns, and

public lands as factors that limit the accessibility of coal.

However, changes in mining practice and findings from

CAS indicate that land use restrictions have changed.

For this assessment, an interim 94-percent rate of

accessibility was applied to the surface-minable DRB in

all counties to account for land use restrictions. This

figure was chosen because it coincides with the statewide average for underground-minable reserves and is

midrange for the surface-minable resources in the CAS

quadrangles studied to date.

Other factors that restrict the accessibility of reserves

include insufficient thickness of bedrock overburden,

insufficient thickness of or incompetent interburden, and

unfavorable roof and floor conditions. The impacts of

these factors are not fully studied at this time, but at the

completion of the Illinois CAS, the accessible reserve

base may be adjusted to include as many of these factors

as practical. The January 1, 1994, accessible reserve base

is considered more accurate than the previous data even

though based partly on preliminary CAS data.

Recovery Rates

EIA provided data on reported recovery rates from

individual mines in Illinois for the years of 1991 to 1993.

These data were compared with regional recovery rates

calculated from depletion (measured from resource

maps) and production data (compiled from State

reports).

Recovery rates for underground reserves were calculated by comparing cumulative depletion of underground reserves with reported production. For those

counties where a valid comparison could be made,

recovery rates for the period 1979 through 1993 ranged

from 40 percent to 58 percent on a county and seam

basis, averaging 48 percent for all seams and counties

combined. This agrees with EIA's data for 1991 through

1993, which show a weighted average recovery rate of

50 percent for all underground mines. Based on these

statistics, a factor of 50 percent was used to calculate

remaining recoverable underground-minable reserves.
14 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

Consideration was given to using a higher recovery rate

in counties where longwall mining is being practiced;

however, EIA data did not show consistently higher

recovery rates at mines operating longwalls. This is

probably due to the influence of such factors as geology,

amount of coal preparation, and development stage of

individual mines. A valid comparison between depletion

and production could not be made in several counties

where reported production included production from

outside the county, or underground-minable reserves

were depleted by surface mining, or production was too

limited to measure depletion at the scale of mapping.

EIA data for individual surface mines for 1991 through

1993 showed recovery rates ranging from 60 to 90 percent, with a weighted average of 75 percent. These

figures compare favorably with recovery rates in selected counties, as calculated from cumulative depletion of

surface-minable resources and reported cumulative

production from surface mines. Both the EIA data and

the ISGS cumulative depletion data from base year of

mapping to 1994 indicate that recovery rates are lower

for thinner seams or seams with many impurities. For

example, the Herrin Coal in the northwestern part of the

State commonly contains impurities&a widespread

parting known as the “blue band” and prevalent occurrences of “white top” and clay dikes. Based on these

data, a recovery rate of 70 percent was used in this study

to calculate surface-minable reserves for seams less than

42 inches thick or for the Herrin Coal in northwestern

Illinois. A recovery rate of 85 percent was used for all

other surface-minable reserves.
Energy Information Administration/ U.S. Coal Reserves: 1997 Update 15

19 Energy Information Administration, U.S. Coal Reserves: A Review and Update, DOE/EIA-0529(95) (Washington, DC, August 1996),

pp. 31-37.

3. 1997 Demonstrated Reserve Base and

Estimated Recoverable Reserves

Demonstrated Reserve Base

The demonstrated reserve base (DRB) of coal in the

United States as of January 1, 1997, contains an estimated 508 billion short tons (Table 6). This is an

increase of 12 billion short tons over the previous

(January 1, 1995) DRB estimate of 496 billion short tons.19

The increase is attributable to updated coal resource

data from the second phase of EIA's Coal Reserves Data

Base (CRDB) project in Illinois (+ 15 billion short tons)

and adjustments for the effects of resource depletion (%

3 billion short tons).

Not all the coal in the DRB is recoverable. EIA's latest

estimates of the recoverable portions of the DRB indicate

that about 54 percent of the national DRB estimate may

be recovered by mining.

The DRB includes coal from States in all geographic

regions. Nearly half the DRB is found in the Western

Coal-Producing Region (Table 7). Coal resources

believed to be minable by surface mining make up

nearly one-third of the DRB, the major part of which (58

percent) occurs in the West. On the other hand, more

than two-thirds of the DRB may be recoverable only by

underground mining, and more than half of that amount

(58 percent) is found in the Interior and Appalachian

Coal-Producing Regions.

Coal rank is a measure of the degree of physical alteration, or “maturation” of the organic matter composing

the coal. Coal ranks are related in a generalized way to

coal heating values. Heat values increase from the

lowest rank, lignite, toward the highest rank, anthracite,

with the highest heat values found in the low-volatile

Table 6. Demonstrated Reserve Base of Coal in the United States, 1995, 1997

(Million Short Tons)

Area and Potential

Method of Mining

Anthracite Bituminous Subbituminous Lignite Total

1997 1995 1997 1995 1997 1995 1997 1995 1997 1995

States East of the

Mississippi ......... 7,345.0 7,350.7 234,728.1 221,345.6 0.0 0.0 1,083.0 1,083.0 243,156.1 229,779.3

Underground Minable 3,975.0 3,975.9 188,964.0 175,553.2 0.0 0.0 0.0 0.0 192,939.0 179,529.1

Surface Minable . . . 3,370.0 3,374.9 45,764.1 45,792.3 0.0 0.0 1,083.0 1,083.0 50,217.1 50,250.2

States West of the

Mississippi ......... 131.9 131.9 36,181.8 36,434.0 185,118.0 185,950.4 43,151.9 43,370.1 264,583.5 265,886.4

Underground Minable 116.4 116.4 27,337.1 27,518.1 121,382.6 121,388.8 0.0 0.0 148,836.1 149,023.3

Surface Minable . . . 15.5 15.5 8,844.6 8,915.9 63,735.4 64,561.7 43,151.9 43,370.1 115,747.4 116,863.1

U.S. Total .......... 7,476.9 7,482.6 270,909.9 257,779.6 185,118.0 185,950.4 44,234.9 44,453.1 507,739.6 495,665.7

Underground 

Minable ........... 4,091.4 4,092.3 216,301.1 203,071.3 121,382.6 121,388.8 0.0 0.0 341,775.2 328,552.4

Surface Minable .... 3,385.4 3,390.4 54,608.8 54,708.3 63,735.4 64,561.7 44,234.9 44,453.1 165,964.4 167,113.3

 Note: Totals based on available data. Totals may not equal sum of components because of independent rounding. Data are reported as of the

first day of the year.

 Sources: EIA Coal Reserves Data Base program, State geological and mineral resource surveys, and other geological reports.
16 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

Table 7. Demonstrated Reserve Base of Coal by State and Rank, 1995, 1997

(Million Short Tons)

Coal Producing

State and Region

Anthracite Bituminous Subbituminous Lignite Total

1997 1995 1997 1995 1997 1995 1997 1995 1997 1995

Alabama . . . . . . . . . . 0.0 0.0 3,463.6 3,552.0 0.0 0.0 1,083.0 1,083.0 4,546.6 4,635.0

Alaska . . . . . . . . . . . . 0.0 0.0 697.5 697.5 5,414.4 5,418.4 14.0 14.0 6,125.9 6,129.9

Arizona . . . . . . . . . . . 0.0 0.0 160.8 188.8 0.0 0.0 0.0 0.0 160.8 188.8

Arkansas ......... 104.1 104.1 287.5 287.5 0.0 0.0 25.4 25.4 416.9 417.0

Colorado .......... 25.5 25.5 8,710.9 8,776.6 3,829.6 3,851.8 4,189.9 4,189.9 16,755.9 16,843.8

Georgia . . . . . . . . . . . 0.0 0.0 3.6 3.6 0.0 0.0 0.0 0.0 3.6 3.6

Idaho . . . . . . . . . . . . . 0.0 0.0 4.4 4.4 0.0 0.0 0.0 0.0 4.4 4.4

Illinois . . . . . . . . . . . . 0.0 0.0 105,068.9 89,956.0 0.0 0.0 0.0 0.0 105,068.9 89,956.0

Indiana . . . . . . . . . . . 0.0 0.0 9,916.5 9,991.0 0.0 0.0 0.0 0.0 9,916.5 9,991.0

Iowa . . . . . . . . . . . . . 0.0 0.0 2,189.5 2,189.5 0.0 0.0 0.0 0.0 2,189.5 2,189.5

Kansas . . . . . . . . . . . 0.0 0.0 975.0 975.6 0.0 0.0 0.0 0.0 975.0 975.6

Kentucky Total . . . . . 0.0 0.0 32,040.6 32,564.7 0.0 0.0 0.0 0.0 32,040.6 32,564.7

 Kentucky, Eastern . 0.0 0.0 12,086.2 12,484.8 0.0 0.0 0.0 0.0 12,086.2 12,484.8

 Kentucky, Western 0.0 0.0 19,954.4 20,079.8 0.0 0.0 0.0 0.0 19,954.4 20,079.8

Louisiana . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 462.7 471.3 462.7 471.3

Maryland . . . . . . . . . . 0.0 0.0 717.0 731.4 0.0 0.0 0.0 0.0 717.0 731.4

Michigan . . . . . . . . . . 0.0 0.0 127.7 127.7 0.0 0.0 0.0 0.0 127.7 127.7

Missouri . . . . . . . . . . 0.0 0.0 5,994.1 5,995.7 0.0 0.0 0.0 0.0 5,994.1 5,995.7

Montana . . . . . . . . . . 0.0 0.0 1,385.4 1,385.4 102,531.3 102,627.4 15,759.8 15,760.5 119,676.5 119,773.3

New Mexico . . . . . . . 2.3 2.3 3,706.2 3,740.7 8,774.2 8,803.8 0.0 0.0 12,482.7 12,546.8

North Carolina . . . . . 0.0 0.0 10.7 10.7 0.0 0.0 0.0 0.0 10.7 10.7

North Dakota . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 9,395.0 9,470.0 9,395.0 9,470.0

Ohio . . . . . . . . . . . . . 0.0 0.0 23,663.9 23,754.0 0.0 0.0 0.0 0.0 23,663.9 23,754.0

Oklahoma . . . . . . . . . 0.0 0.0 1,575.0 1,579.6 0.0 0.0 0.0 0.0 1,575.0 1,579.6

Oregon . . . . . . . . . . . 0.0 0.0 0.0 0.0 17.5 17.5 0.0 0.0 17.5 17.5

Pennsylvania Total . . 7,219.5 7,225.2 21,426.6 21,642.6 0.0 0.0 0.0 0.0 28,646.1 28,867.8

 Anthracite ....... 7,219.5 7,225.2 0.0 0.0 0.0 0.0 0.0 0.0 7,219.5 7,225.2

 Bituminous . . . . . . . 0.0 0.0 21,426.6 21,642.6 0.0 0.0 0.0 0.0 21,426.6 21,642.6

South Dakota . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 366.1 366.1 366.1 366.1

Tennessee . . . . . . . . 0.0 0.0 815.7 827.1 0.0 0.0 0.0 0.0 815.7 827.1

Texas . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 12,931.0 13,064.9 12,931.0 13,064.9

Utah . . . . . . . . . . . . . 0.0 0.0 5,849.3 5,954.6 1.1 1.1 0.0 0.0 5,850.4 5,955.7

Virginia ........... 125.5 125.5 2,076.5 2,201.8 0.0 0.0 0.0 0.0 2,202.0 2,327.3

Washington . . . . . . . 0.0 0.0 303.7 303.7 1,077.9 1,089.2 8.1 8.1 1,389.7 1,400.9

West Virginia . . . . . . 0.0 0.0 35,397.1 35,983.1 0.0 0.0 0.0 0.0 35,397.1 35,983.1

Wyoming . . . . . . . . . 0.0 0.0 4,342.5 4,354.4 63,471.9 64,141.4 0.0 0.0 67,814.5 68,495.8

Appalachian Total1 . 7,345.0 7,350.7 99,660.8 101,191.1 0.0 0.0 1,083.0 1,083.0 108,088.8 109,624.8

Interior Total1 ..... 104.1 104.1 146,088.3 131,182.3 0.0 0.0 13,419.0 13,561.6 159,611.4 144,848.0

Western Total1 ...... 27.8 27.8 25,160.8 25,406.2 185,118.0 185,950.4 29,732.8 29,808.5 240,039.5 241,193.0

East of the

Mississippi ....... 7,345.0 7,350.7 234,728.1 221,345.6 0.0 0.0 1,083.0 1,083.0 243,156.1 229,779.3

West of the

Mississippi ....... 131.9 131.9 36,181.8 36,434.0 185,118.0 185,950.4 43,151.9 43,370.1 264,583.5 265,886.4

U.S. Total ......... 7,476.9 7,482.6 270,909.9 257,779.6 185,118.0 185,950.4 44,234.9 44,453.1 507,739.7 495,665.7

 1

For a definition of coal-producing regions, see Table 13.

 Note: Totals based on available data. Totals may not equal sum of components because of independent rounding. Data are reported as of the

first day of the year. 

 Sources: EIA Coal Reserves Data Base program, State geological and mineral resource surveys, and other geological reports.
Energy Information Administration/ U.S. Coal Reserves: 1997 Update 17

bituminous coals, just below anthracite in rank. Fiftythree percent of the DRB is comprised of bituminous

coals, which are found primarily in the Interior and

Appalachian Regions. Subbituminous coals account for

more than 36 percent of the total and is all located in the

Western States. Lignite makes up less than 9 percent of

the DRB, primarily located in the West. Anthracite

represents only 1.5 percent of the DRB and almost all of

it is located in northeastern Pennsylvania.

DRB summary data by State, coal rank, and potential

mining method are presented in Tables 7 through 10,

along with the previous (January 1, 1995) DRB for

comparison. With the exception of Illinois, the 1997 DRB

is based on the same data sources used for the previous

DRB. All data are updated to the current base year to

account for the estimated effects of resource depletion

due to mining and coal lost in the mining process.

The sulfur content of the coal in the DRB has been

estimated by EIA according to six ranges of pounds of

sulfur per million Btu and five ranges of heat value, in

millions of Btu per short ton (Table A1). For more

general discussion, however, EIA refers to three major

sulfur ranges: low, medium, and high (Table 11).

Although no single sulfur range prevails for coal in the

United States, there is more high-sulfur coal currently in

the DRB than any other range (Table 12). High-sulfur

coal makes up 196.9 billion short tons, or 39 percent of

all coal included in the DRB. Medium-sulfur coal totals

140.9 billion short tons, or 28 percent of the DRB, and

low-sulfur coal amounts to 169.9 billion short tons, or 33

percent. 

When examined at the regional level, the distribution of

sulfur ranges in coal is much less equally divided. Most

of the low-sulfur coal included in the DRB (84 percent)

is in the West. Appalachia encompasses 15 percent of the

low-sulfur DRB and the Interior only 1 percent (2 billion

short tons of low-sulfur resources), located entirely in

Illinois, Oklahoma, and Indiana. Similarly, an estimated

87 billion short tons (61 percent) of the medium-sulfur

DRB coal is in the West, about 27 percent of the total is

estimated to be in Appalachia, and only 13 percent is in

the Interior Region. Most of the high-sulfur DRB is in

the Interior Region. EIA estimates that the Interior

contains nearly 71 percent of the total high-sulfur DRB

coal in the United States; Appalachia, less than 23

percent; and the West, 6 percent.

In regard to overall quantities of coal, the smallest share

now belongs to the Appalachian Region, with 108 billion

short tons, or 21 percent of the DRB. Coal resources in

this region are almost entirely bituminous. Low-sulfur

coal accounts for 24 percent of the region's DRB,

medium-sulfur coal for nearly 35 percent, and highsulfur coal for more than 41 percent. Low-sulfur coal in

Appalachia is concentrated in eastern Kentucky,

Virginia, southern West Virginia, and in the Pennsylvania anthracite field.

The Interior Region is estimated to contain 159.6 billion

short tons, or 31 percent of the DRB of U.S. coal. All of

the DRB coal in the region is bituminous, except for 13.4

billion short tons of lignite deposits, primarily in Texas,

and 0.1 billion short tons of anthracite in Arkansas

(Table 7). More than 87 percent of the region's DRB is

high-sulfur coal and only 1 percent is low-sulfur coal.

In the Western Region, the DRB is estimated at 240.0

billion short tons, which is 47 percent of the U.S. total.

Subbituminous coal is most prevalent in the West, where

it constitutes 77 percent of the Region’s DRB, with the

vast majority occurring in Montana and Wyoming

(Table 7). Lignite makes up more than 12 percent of the

DRB in the West, primarily in the Fort Union-age

geologic deposits of Montana and North Dakota and the

relatively young, Tertiary-age Gulf Coast deposits of

Texas. The remainder, more than 10 percent of the

Western DRB, is bituminous coal, found mostly in

Colorado, Utah, and Wyoming, plus small areas of

anthracite in several scattered locations. The EIA

estimates that 59 percent of the DRB coal in the West is

low-sulfur, that 36 percent is medium-sulfur, and that 5

percent is high-sulfur (Table 12).

Accessible Resources

Although the 508 billion short tons of coal in the DRB is

477 times the Nation's coal production in 1996, almost

half of the DRB is not expected to be recovered. First,

more than 17 percent of the DRB is estimated as

presently inaccessible for mining. Then, of the accessible

portion of the DRB, EIA estimates that only 66 percent

can actually be recovered by mining, with the other 34

percent likely to be lost in the mining process, based on

recent mining experience. The result is that only a net 54

percent of the DRB is believed to be recoverable.

The EIA no longer publishes the detailed accessible

reserve base table, that is, the tonnages of the DRB that

are estimated as accessible for future mining. The

accessibility factors are summarized in Table 13 in the

net accessibility factors compiled or estimated for each

coal supply region. Note that the accessibility factors

reported in Table 13 are the converse of the “inaccessible

resource factors” listed in earlier versions of this report.
18 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

Table 8. Demonstrated Reserve Base of Coal by State and Potential Method of Mining, 1995, 1997

(Million Short Tons)

Coal Producing

State and Region

Underground Surface Total

1997 1995 1997 1995 1997 1995

Alabama .................. 1,290.2 1,361.9 3,256.3 3,273.1 4,546.6 4,635.0

Alaska .................... 5,423.0 5,423.0 703.0 706.9 6,125.9 6,129.9

Arizona ................... 101.6 101.6 59.3 87.3 160.8 188.8

Arkansas ................. 272.5 272.5 144.4 144.5 416.9 417.0

Colorado .................. 11,978.5 12,049.1 4,777.4 4,794.7 16,755.9 16,843.8

Georgia . . . . . . . . . . . . . . . . . . . 1.9 1.9 1.7 1.7 3.6 3.6

Idaho . . . . . . . . . . . . . . . . . . . . . 4.4 4.4 0.0 0.0 4.4 4.4

Illinois .................... 88,460.5 73,781.3 16,608.4 16,174.7 105,068.9 89,956.0

Indiana ................... 8,859.8 8,872.8 1,056.7 1,118.1 9,916.5 9,991.0

Iowa ..................... 1,732.5 1,732.5 457.0 457.0 2,189.5 2,189.5

Kansas . . . . . . . . . . . . . . . . . . . 0.0 0.0 975.0 975.6 975.0 975.6

Kentucky Total ............. 18,507.8 18,884.8 13,532.8 13,679.8 32,040.6 32,564.7

 Kentucky, Eastern ......... 2,246.9 2,525.0 9,839.3 9,959.9 12,086.2 12,484.8

 Kentucky, Western ........ 16,260.9 16,359.9 3,693.5 3,720.0 19,954.4 20,079.8

Louisiana . . . . . . . . . . . . . . . . . 0.0 0.0 462.7 471.3 462.7 471.3

Maryland .................. 636.8 649.2 80.2 82.2 717.0 731.4

Michigan .................. 123.1 123.1 4.6 4.6 127.7 127.7

Missouri .................. 1,479.1 1,479.1 4,514.9 4,516.5 5,994.1 5,995.7

Montana .................. 70,958.4 70,958.7 48,718.2 48,814.6 119,676.5 119,773.3

New Mexico ............... 6,204.1 6,205.4 6,278.6 6,341.4 12,482.7 12,546.8

North Carolina ............. 10.7 10.7 0.0 0.0 10.7 10.7

North Dakota . . . . . . . . . . . . . . 0.0 0.0 9,395.0 9,470.0 9,395.0 9,470.0

Ohio ..................... 17,788.7 17,846.7 5,875.2 5,907.3 23,663.9 23,754.0

Oklahoma ................. 1,237.0 1,237.4 338.0 342.2 1,575.0 1,579.6

Oregon ................... 14.5 14.5 2.9 2.9 17.5 17.5

Pennsylvania Total .......... 24,231.7 24,408.2 4,414.4 4,459.6 28,646.1 28,867.8

 Anthracite ............... 3,849.5 3,850.4 3,370.0 3,374.9 7,219.5 7,225.2

 Bituminous ............... 20,382.2 20,557.9 1,044.4 1,084.7 21,426.6 21,642.6

South Dakota . . . . . . . . . . . . . . 0.0 0.0 366.1 366.1 366.1 366.1

Tennessee ................ 531.5 539.0 284.3 288.2 815.7 827.1

Texas . . . . . . . . . . . . . . . . . . . . 0.0 0.0 12,931.0 13,064.9 12,931.0 13,064.9

Utah ..................... 5,582.5 5,687.8 267.9 267.9 5,850.4 5,955.7

Virginia ................... 1,528.2 1,630.0 673.8 697.3 2,202.0 2,327.3

Washington ............... 1,332.3 1,332.3 57.4 68.7 1,389.7 1,400.9

West Virginia .............. 30,968.3 31,419.5 4,428.8 4,563.6 35,397.1 35,983.1

Wyoming ................. 42,515.8 42,525.1 25,298.7 25,970.7 67,814.5 68,495.8

Appalachian Total1 ......... 79,234.7 80,392.0 28,854.0 29,232.8 108,088.8 109,624.8

Interior Total1 ............. 118,425.4 103,858.6 41,186.0 40,989.4 159,611.4 144,848.0

Western Total1 ............ 144,115.0 144,301.8 95,924.5 96,891.1 240,039.5 241,193.0

East of the Mississippi ...... 192,939.0 179,529.1 50,217.1 50,250.2 243,156.1 229,779.3

West of the Mississippi ..... 148,836.1 149,023.3 115,747.4 116,863.1 264,583.5 265,886.4

U.S. Total ................. 341,775.1 328,552.4 165,964.5 167,113.3 507,739.6 495,665.7

 1For a definition of coal-producing regions, see Table 13.

 Note: Totals based on available data. Totals may not equal sum of components because of independent rounding. Data are reported as of the

first day of the year.

 Sources: EIA Coal Reserves Data Base program, State geological and mineral resource surveys, and other geological reports.
Energy Information Administration/ U.S. Coal Reserves: 1997 Update 19

Table 9. Demonstrated Reserve Base of Coal by State and Rank, Potentially Minable by Underground

Methods, 1995, 1997

(Million Short Tons)

Coal Producing State

and Region

Anthracite Bituminous Subbituminous Lignite Total

1997 1995 1997 1995 1997 1995 1997 1995 1997 1995

Alabama . . . . . . . . . . . 0.0 0.0 1,290.2 1,361.9 0.0 0.0 0.0 0.0 1,290.2 1,361.9

Alaska . . . . . . . . . . . . . 0.0 0.0 617.0 617.0 4,805.9 4,805.9 0.0 0.0 5,423.0 5,423.0

Arizona . . . . . . . . . . . . 0.0 0.0 101.6 101.6 0.0 0.0 0.0 0.0 101.6 101.6

Arkansas .......... 88.6 88.6 183.9 183.9 0.0 0.0 0.0 0.0 272.5 272.5

Colorado ........... 25.5 25.5 8,123.4 8,188.1 3,829.6 3,835.5 0.0 0.0 11,978.5 12,049.1

Georgia . . . . . . . . . . . . 0.0 0.0 1.9 1.9 0.0 0.0 0.0 0.0 1.9 1.9

Idaho . . . . . . . . . . . . . . 0.0 0.0 4.4 4.4 0.0 0.0 0.0 0.0 4.4 4.4

Illinois . . . . . . . . . . . . . 0.0 0.0 88,460.5 73,781.3 0.0 0.0 0.0 0.0 88,460.5 73,781.3

Indiana . . . . . . . . . . . . 0.0 0.0 8,859.8 8,872.8 0.0 0.0 0.0 0.0 8,859.8 8,872.8

Iowa . . . . . . . . . . . . . . 0.0 0.0 1,732.5 1,732.5 0.0 0.0 0.0 0.0 1,732.5 1,732.5

Kentucky Total . . . . . . 0.0 0.0 18,507.8 18,884.8 0.0 0.0 0.0 0.0 18,507.8 18,884.8

 Kentucky, Eastern 0.0 0.0 2,246.9 2,525.0 0.0 0.0 0.0 0.0 2,246.9 2,525.0

 Kentucky, Western . 0.0 0.0 16,260.9 16,359.9 0.0 0.0 0.0 0.0 16,260.9 16,359.9

Maryland . . . . . . . . . . . 0.0 0.0 636.8 649.2 0.0 0.0 0.0 0.0 636.8 649.2

Michigan . . . . . . . . . . . 0.0 0.0 123.1 123.1 0.0 0.0 0.0 0.0 123.1 123.1

Missouri . . . . . . . . . . . 0.0 0.0 1,479.1 1,479.1 0.0 0.0 0.0 0.0 1,479.1 1,479.1

Montana . . . . . . . . . . . 0.0 0.0 1,385.4 1,385.4 69,573.0 69,573.3 0.0 0.0 70,958.4 70,958.7

New Mexico . . . . . . . . 2.3 2.3 2,735.0 2,736.3 3,466.8 3,466.8 0.0 0.0 6,204.1 6,205.4

North Carolina . . . . . . 0.0 0.0 10.7 10.7 0.0 0.0 0.0 0.0 10.7 10.7

Ohio . . . . . . . . . . . . . . 0.0 0.0 17,788.7 17,846.7 0.0 0.0 0.0 0.0 17,788.7 17,846.7

Oklahoma . . . . . . . . . . 0.0 0.0 1,237.0 1,237.4 0.0 0.0 0.0 0.0 1,237.0 1,237.4

Oregon . . . . . . . . . . . . 0.0 0.0 0.0 0.0 14.5 14.5 0.0 0.0 14.5 14.5

Pennsylvania Total . . . 3,849.5 3,850.4 20,382.2 20,557.9 0.0 0.0 0.0 0.0 24,231.7 24,408.2

 Anthracite ........ 3,849.5 3,850.4 0.0 0.0 0.0 0.0 0.0 0.0 3,849.5 3,850.4

 Bituminous . . . . . . . . 0.0 0.0 20,382.2 20,557.9 0.0 0.0 0.0 0.0 20,382.2 20,557.9

Tennessee . . . . . . . . . 0.0 0.0 531.5 539.0 0.0 0.0 0.0 0.0 531.5 539.0

Utah . . . . . . . . . . . . . . 0.0 0.0 5,581.4 5,686.7 1.1 1.1 0.0 0.0 5,582.5 5,687.8

Virginia ............ 125.5 125.5 1,402.7 1,504.6 0.0 0.0 0.0 0.0 1,528.2 1,630.0

Washington . . . . . . . . 0.0 0.0 303.7 303.7 1,028.6 1,028.6 0.0 0.0 1,332.3 1,332.3

West Virginia . . . . . . . 0.0 0.0 30,968.3 31,419.5 0.0 0.0 0.0 0.0 30,968.3 31,419.5

Wyoming . . . . . . . . . . 0.0 0.0 3,852.7 3,862.0 38,663.1 38,663.1 0.0 0.0 42,515.8 42,525.1

Appalachian Total1 . . 3,975.0 3,975.9 75,259.7 76,416.1 0.0 0.0 0.0 0.0 79,234.8 80,392.0

Interior Total1 ...... 88.6 88.6 1 18,336.8 103,770.0 0.0 0.0 0.0 0.0 118,425.4 103,858.6

Western Total1 ..... 27.8 27.8 22,704.6 22,885.2 121,382.6 121,388.8 0.0 0.0 144,115.0 144,301.8

East of the

Mississippi ........ 3,975.0 3,975.9 1 88,964.0 175,553.2 0.0 0.0 0.0 0.0 192,939.0 179,529.1

West of the

Mississippi ........ 116.4 116.4 27,337.1 27,518.1 121,382.6 121,388.8 0.0 0.0 148,836.1 149,023.3

U.S. Total .......... 4,091.4 4,092.3 2 16,301.1 203,071.3 121,382.6 121,388.8 0.0 0.0 341,775.2 328,552.4

 1

 For a definition of coal-producing regions, see Table 13.

 Note: Totals based on available data. Totals may not equal sum of components because of independent rounding. Data are reported as of the

first day of the year.

 Sources: EIA Coal Reserves Data Base program, State geological and mineral resource surveys, and other geological reports.
20 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

Table 10. Demonstrated Reserve Base of Coal by State and Rank, Potentially Minable by Surface

Methods, 1995, 1997

(Million Short Tons)

Coal Producing

State and Region

Anthracite Bituminous Subbituminous Lignite Total

1997 1995 1997 1995 1997 1995 1997 1995 1997 1995

Alabama . . . . . . . . . - 0.0 2,173.3 2,190.1 0.0 0.0 1,083.0 1,083.0 3,256.3 3,273.1

Alaska . . . . . . . . . . . 0.0 0.0 80.5 80.5 608.5 612.4 14.0 14.0 703.0 706.9

Arizona . . . . . . . . . . 0.0 0.0 59.3 87.3 0.0 0.0 0.0 0.0 59.3 87.3

Arkansas ........ 15.5 15.5 103.6 103.6 0.0 0.0 25.4 25.4 144.4 144.5

Colorado . . . . . . . . . 0.0 0.0 587.6 588.5 0.0 16.3 4,189.9 4,189.9 4,777.4 4,794.7

Georgia . . . . . . . . . . 0.0 0.0 1.7 1.7 0.0 0.0 0.0 0.0 1.7 1.7

Illinois . . . . . . . . . . . 0.0 0.0 16,608.4 16,174.7 0.0 0.0 0.0 0.0 16,608.4 16,174.7

Indiana . . . . . . . . . . 0.0 0.0 1,056.7 1,118.1 0.0 0.0 0.0 0.0 1,056.7 1,118.1

Iowa . . . . . . . . . . . . 0.0 0.0 457.0 457.0 0.0 0.0 0.0 0.0 457.0 457.0

Kansas . . . . . . . . . . 0.0 0.0 975.0 975.6 0.0 0.0 0.0 0.0 975.0 975.6

Kentucky Total . . . . 0.0 0.0 13,532.8 13,679.8 0.0 0.0 0.0 0.0 13,532.8 13,679.8

 Kentucky, Eastern 0.0 0.0 9,839.3 9,959.9 0.0 0.0 0.0 0.0 9,839.3 9,959.9

 Kentucky, Western 0.0 0.0 3,693.5 3,720.0 0.0 0.0 0.0 0.0 3,693.5 3,720.0

Louisiana . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 462.7 471.3 462.7 471.3

Maryland . . . . . . . . . 0.0 0.0 80.2 82.2 0.0 0.0 0.0 0.0 80.2 82.2

Michigan . . . . . . . . . 0.0 0.0 4.6 4.6 0.0 0.0 0.0 0.0 4.6 4.6

Missouri . . . . . . . . . 0.0 0.0 4,514.9 4,516.5 0.0 0.0 0.0 0.0 4,514.9 4,516.5

Montana . . . . . . . . . 0.0 0.0 0.0 0.0 32,958.3 33,054.1 15,759.8 15,760.5 48,718.2 48,814.6

New Mexico . . . . . . 0.0 0.0 971.1 1,004.4 5,307.4 5,337.0 0.0 0.0 6,278.6 6,341.4

North Dakota . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 9,395.0 9,470.0 9,395.0 9,470.0

Ohio . . . . . . . . . . . . 0.0 0.0 5,875.2 5,907.3 0.0 0.0 0.0 0.0 5,875.2 5,907.3

Oklahoma . . . . . . . . 0.0 0.0 338.0 342.2 0.0 0.0 0.0 0.0 338.0 342.2

Oregon . . . . . . . . . . 0.0 0.0 0.0 0.0 2.9 2.9 0.0 0.0 2.9 2.9

Pennsylvania Total . 3,370.0 3,374.9 1,044.4 1,084.7 0.0 0.0 0.0 0.0 4,414.4 4,459.6

 Anthracite ...... 3,370.0 3,374.9 0.0 0.0 0.0 0.0 0.0 0.0 3,370.0 3,374.9

 Bituminous . . . . . . 0.0 0.0 1,044.4 1,084.7 0.0 0.0 0.0 0.0 1,044.4 1,084.7

South Dakota . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 366.1 366.1 366.1 366.1

Tennessee . . . . . . . 0.0 0.0 284.3 288.2 0.0 0.0 0.0 0.0 284.3 288.2

Texas . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 12,931.0 13,064.9 12,931.0 13,064.9

Utah . . . . . . . . . . . . 0.0 0.0 267.9 267.9 0.0 0.0 0.0 0.0 267.9 267.9

Virginia . . . . . . . . . . 0.0 0.0 673.8 697.3 0.0 0.0 0.0 0.0 673.8 697.3

Washington . . . . . . 0.0 0.0 0.0 0.0 49.3 60.6 8.1 8.1 57.4 68.7

West Virginia . . . . . 0.0 0.0 4,428.8 4,563.6 0.0 0.0 0.0 0.0 4,428.8 4,563.6

Wyoming . . . . . . . . 0.0 0.0 489.8 492.4 24,808.8 25,478.3 0.0 0.0 25,298.7 25,970.7

Appalachian Total1 3,370.0 3,374.9 24,401.1 24,775.0 0.0 0.0 1,083.0 1,083.0 28,854.0 29,232.8

Interior Total1 .... 15.5 15.5 27,751.5 27,412.3 0.0 0.0 13,419.0 13,561.6 41,186.0 40,989.4

Western Total1 . . . 0.0 0.0 2,456.2 2,521.0 63,735.4 64,561.7 29,732.8 29,808.5 95,924.5 96,891.1

East of the

Mississippi ...... 3,370.0 3,374.9 45,764.1 45,792.3 0.0 0.0 1,083.0 1,083.0 50,217.1 50,250.2

West of the

Mississippi ...... 15.5 15.5 8,844.6 8,915.9 63,735.4 64,561.7 43,151.9 43,370.1 115,747.4 116,863.1

U.S. Total ........ 3,385.4 3,390.4 54,608.8 54,708.3 63,735.4 64,561.7 44,234.9 44,453.1 165,964.4 167,113.3

 1

 For a definition of coal-producing regions, see Table 13.

 Note: Totals based on available data. Totals may not equal sum of components because of independent rounding. Data are reported as of the

first day of the year.

 Sources: EIA Coal Reserves Data Base program, State geological and mineral resource surveys, and other geological reports.
Energy Information Administration/ U.S. Coal Reserves: 1997 Update 21

Qualitative

Rating

Pounds of

Sulfur per

Million Btua

Approximate Range of Sulfur

Content (percent)b

Approximate Correlation with

Sulfur Criteria for Coal

High-Grade

Bituminous

High-Grade

Lignite

Low Sulfur .....  0.40  0.5  0.3 Exceeds 1971 NSPS Requirementsb

0.41-0.60 0.5%0.8 0.3%0.5 Meets 1971 NSPS Requirementsb

Medium Sulfur . . 0.61-0.83 0.8%1.1 0.5%0.6 Fails 1971 NSPS; marginally low-sulfur coal, may 

meet 1971 NSPS when blended

0.84-1.67 1.1%2.2 0.6%1.3 Fails 1971 NSPS; would require use of emission

reduction technologies on new-source boilers

High Sulfur ..... 1.68-2.50

> 2.50

2.2%3.3

> 3.3

1.3%1.9

> 1.9

Coals used primarily in pre-regulation boilers, such

as units affected by Phase I of CAAA90. Units using

high-sulfur coals either have or will install scrubbers,

may be able to offset emissions with allowances, or

may be operated at reduced capacity and/or

eventually replaced.

 a

As-received basis.

 b

Percent sulfur content by weight, as-received basis.

 Notes: NSPS Requirements refers to New Source Performance Standards authorized under the Clean Air Act Amendments

of 1970 and issued in 1971 by the Environmental Protection Agency (EPA). NSPS affected new or modified electric utility units

of more than 73 megawatts capacity and required that average emissions not exceed 1.2 pounds of SO2 per million Btu of heat

input. To ensure compliance, the NSPS relied on “command and control” regulations, which specified abatement technologies

and imposed fines and penalties. In 1979, the EPA issued Revised NSPS, required under the Clean Air Act Amendments of 1977.

The revised standards applied more broadly and imposed additional mitigation requirements on new source utility plants, but 1.2

pounds of SO2 per million Btu remained as the key criterion for coal. This “compliance coal” standard is still in effect, although

it has been eclipsed somewhat by the CAAA90, which established more flexible, market-based compliance mechanisms.

CAAA90 refers to the Clean Air Act Amendments of 1990, under which EPA set up a market to trade in emission

“allowances,” one for each ton of SO2. Under CAAA90, a national limit of 8.95 million allowances will take effect in 2000 for annual

SO2 emissions from existing and future electric utility units of more than 25 megawatts. Utilities may choose to meet national limits

by buying allowances; by reducing emissions through fuel switching, coal cleaning, flue gas desulfurization (scrubbing), or

advanced utilization technologies; and by offsetting high-emission units via increased use of low-emission units or purchase of

unused allowances from utilities that have reduced their SO2 emissions. Phase I (1995-1999) is the period by which 261 units,

identified in CAAA90 as the largest electric utility sources of SO2 and nitrous oxide emissions, were required to meet interim

emission levels. The 261 are older units that previously had not been required to reduce SO2 output. Phase II, beginning in 2000,

will further tighten annual emission limits for the 261 units as well as set restrictions for virtually all new units, both utility and

nonutility, of 25 megawatts or greater.

 Source: Energy Information Administration, Acid Rain Compliance Strategies for the Clean Air Act Amendments of 1990,

DOE/EIA-0582 (Washington, DC, March 1994), pp. ix-3.

Table 11. EIA Sulfur Content Categories for Coal

Accessibility factors represent the fraction of the

DRB&surface or underground&that is presently considered accessible for future development. They are

usually determined by measuring or estimating the areas

or tonnages of inaccessible coal resources in a study area.

Accessibility adjustments are also recognized as a useful

intermediate level at which to make and document

internal adjustments that account for variations from

standard DRB criteria due to local mining practice. (For

example, in Chapter 2, the exclusion of 42-inch or

thinner beds from underground mining in Illinois.)

EIA’s accessibility factors are closely comparable with

U.S. Geological Survey (USGS) Coal Availability Study

data.

Estimated Recoverable Reserves

Recovery factors (Table 13) follow the same format as

accessibility factors and are based on recent coal
22 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

20 Energy Information Administration, U.S. Coal Reserves: An Update by Heat and Sulfur Content, DOE/EIA-0529(92) (Washington, DC,

February 1993) p. 24.

Table 12. Demonstrated Reserve Base of Coal in the United States by Sulfur Range and

Coal-Producing Region

(Million Short Tons Remaining as of January 1, 1997)

Coal-Producing

Region

Summary Sulfur Content Categoriesa

(Pounds of Sulfur per Million Btu)

Low Sulfur

( 0.60)

Medium Sulfur

(0.61-1.67)

High Sulfur

( 1.68) Total

Million

Short Tons

Percent

 of Total

Million

Short Tons

Percent

 of Total

Million

Short Tons

Percent

of Total

Million

Short Tons

Percent

of Total

Surface

 Appalachia ..... 9,261.62 (15.6%) 11,352.96 (19.4%) 8,239.42 (17.1%) 28,853.99 (17.4%)

 Interior ........ 197.91 (0.3%) 9,511.24 (16.2%) 31,476.83 (65.5%) 41,185.98 (24.8%)

 West .......... 49,814.32 (84.0%) 37,772.15 (64.4%) 8,337.98 (17.4%) 95,924.45 (57.8%)

 U.S. Total ...... 59,273.85 (100.0%) 58,636.36 (100.0%) 48,054.22 (100.0%) 165,964.43 (100.0%)

Underground

 Appalachia ..... 16,607.81 (15.0%) 26,038.79 (31.6%) 36,588.17 (24.6%) 79,234.78 (23.2%)

 Interior ........ 1,862.67 (1.7%) 8,349.47 (10.1%) 108,213.30 (72.7%) 118,425.43 (34.7%)

 West .......... 92,152.75 (83.3%) 47,909.26 (58.2%) 4,053.00 (2.7%) 144,115.01 (42.2%)

 U.S. Total ...... 110,623.23 (100.0%) 82,297.52 (100.0%) 148,854.47 (100.0%) 341,775.22 (100.0%)

Total

 Appalachia ..... 25,869.43 (15.2%) 37,391.75 (26.50%) 44,827.59 (22.8%) 108,088.77 (21.3%)

 Interior ........ 2,060.58 (1.2%) 17,860.71 (12.70%) 44,827.59 (70.9%) 159,611.42 (31.4%)

 West .......... 141,967.07 (83.6%) 85,681.42 (60.80%) 12,390.12 (6.3%) 240,039.47 (47.3%)

 U.S. Total ...... 169,897.08 (100.0%) 140,933.88 (100.00%) 196,908.69 (100.0%) 507,739.65 (100.0%)

 a

For detailed analyses, the EIA uses six sulfur content ranges. For general discussion and summary data, however, those six ranges

are combined into the three qualitative ratings of coal presented here (low-, medium-, and high-sulfur content).

 Notes: Coal supply regions that comprise each coal-producing region above are listed in Table 17. Data may not equal sum of

components due to independent rounding.

 Source: EIA Coal Reserves Data Base program, State geological and mineral resource surveys, and other geological reports.

recovery rates for coal mining reported to EIA by mine

operators. These may be supplemented by coal field

interviews and observations.

The estimated recoverable reserves of coal in the United

States(Table B2) represent the estimated portion of the

DRB, allocated by Btu and sulfur ranges, that can be

recovered by standard mining technologies, assuming

a market and an adequate selling price at the time of

mining. These reserves are summarized by low-, medium-, and high-sulfur levels in Table 14.

The 1997 estimated recoverable reserves are 1.2 billion

short tons larger than estimated for 1995. The 1995

estimated recoverable reserves, in turn, had increased by

9.2 billion short tons, or 3.4 percent, over the previous

recoverable reserve estimates, for 1992.20 At 36 percent,

low-sulfur estimated recoverable reserves make up the

largest part of the total. Medium-sulfur reserves account

for 31 percent and high-sulfur reserves for 33 percent.

Based on current mining trends, however, much of the

64 percent of recoverable coal reserves containing

medium and high sulfur levels may not soon be mined

because of unfavorable quality, prices, mining costs,

location, and/or transportation infrastructure.

Although the summary data in Tables 12 and 14 are both

derived from the DRB database, differences in the characteristics of the mines and coal types in the three

regions cause differences in data distribution. For

example, the surface-minable DRB in Appalachia constitutes 17 percent of the DRB of the United States but

only 13 percent of the estimated recoverable reserves,
Energy Information Administration/ U.S. Coal Reserves: 1997 Update 23

Coal-Producing Region 

State 

Accessibility Factor Recovery Factor

Surface Underground Surface Underground

Appalachia

 Alabama . . . . . . . . . . . . . . 83 90 86 56

 Georgia . . . . . . . . . . . . . . . 85 90 80 50

 Kentucky, Eastern . . . . . . . 71 91 79 62

 Maryland . . . . . . . . . . . . . . 85 90 80 61

 North Carolina . . . . . . . . . . 85 90 80 50

 Ohio . . . . . . . . . . . . . . . . . 82 88 80 50

 Pennsylvania, Anthracite . . 14 18 90 50

 Pennsylvania, Bituminous . 85 90 82 59

 Tennessee . . . . . . . . . . . . . 85 90 80 61

 Virginia . . . . . . . . . . . . . . . 80 90 80 62

 West Virginia, Northern . . . 75 90 79 59

 West Virginia, Southern . . . 82 90 79 59

Interior

 Arkansas . . . . . . . . . . . . . . 85 90 82 52

 Illinois . . . . . . . . . . . . . . . . 80 64 76 50

 Indiana . . . . . . . . . . . . . . . 71 80 82 52

 Iowa . . . . . . . . . . . . . . . . . 85 90 82 52

 Kansas . . . . . . . . . . . . . . . 85 90 82 60

 Kentucky, Western . . . . . . 75 80 83 53

 Louisiana . . . . . . . . . . . . . . 90 90 82 60

 Michigan . . . . . . . . . . . . . . 85 90 80 50

 Missouri . . . . . . . . . . . . . . . 85 90 82 52

 Oklahoma . . . . . . . . . . . . . 85 90 82 52

 Texas . . . . . . . . . . . . . . . . 90 90 86 60

Western

 Alaska, Northern . . . . . . . . 50 50 00 00

 Alaska, Southern . . . . . . . 90 90 88 56

 Arizona . . . . . . . . . . . . . . . 90 90 88 56

 Colorado . . . . . . . . . . . . . . 89 90 88 58

 Idaho . . . . . . . . . . . . . . . . . 86 90 80 50

 Montana, Eastern . . . . . . . 86 90 91 56

 Montana, Western . . . . . . . 90 90 91 56

 New Mexico . . . . . . . . . . . . 90 90 88 56

 North Dakota . . . . . . . . . . . 85 90 90 50

 Oregon . . . . . . . . . . . . . . . 90 90 80 50

 South Dakota . . . . . . . . . . . 84 90 90 60

 Utah . . . . . . . . . . . . . . . . . 90 90 88 54

 Washington . . . . . . . . . . . 90 90 88 56

 Wyoming . . . . . . . . . . . . . . 98 90 89 60

 Sources: Energy Information Administration, Estimation of U.S. Coal Reserves by Coal Type: Heat and Sulfur Content, 1987

data (1989); also Coal Reserves Data Base Program, Office of Coal, Nuclear, Electric and Alternate Fuels (1998) and Form EIA7A, “Coal Production Report” (1992-1996).

Table 13. Net Accessibility and Recovery Factors for Coal Resources, by Coal-Producing Region
24 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

21 As the results of more USGS Coal Availability Studies become available and, in general, as more up-to-date accessibility estimates

are made, it is likely that additional instances of diminished accessibility to coal resources will be determined in Appalachia.

while in the West the surface-minable DRB is 58 percent

of the national DRB but makes up a higher portion&64

percent&of the estimated U.S. recoverable reserves. The

differences between DRB and recoverable reserve

portions reflect the higher accessibility and recovery

rates achievable in the West. 

Further, in Appalachia, the surface accessibility factors

average only 70 percent&lower than in the West because

of more land use constraints and physical minability

restrictions. Also, Appalachian accessibility is skewed by

the extremely low rate of accessibility in the Pennsylvania anhracite region (14 percent). With that region

excluded, the surface accessibility factor would rise to 77

percent. Surface accessibility in eastern Kentucky at 71

percent is also well below the regional average. This

low percentage reflects the fact that in eastern Kentucky

many of the thin coalbeds in the surface-minable DRB

are mined only selectively.21 The DRB is considered to be

inaccessible for thin coalbeds in eastern Kentucky in

districts and thicknesses currently not commercially

minable.

Finally, the surface mining rates of recovery are kept

lower in Appalachia by the need to mine in thinner beds

and (to varying degrees) in more difficult topography, in

more indurated overburdens, and with more frequent

groundwater and surface water concerns than in the

major Western coal supply areas. Appalachian recovery

rates average about 81 percent for the coal resources

considered accessible.

Table 14. Estimated Recoverable Reserves of Coal in the United States by Sulfur Range and Major

Region

(Remaining as of January 1, 1997)

Coal-Producing

Region

Summary Sulfur Content Categoriesa

(Pounds of Sulfur per Million Btu)

Low Sulfur

( 0.60)

Medium Sulfur

(0.61-1.67)

High Sulfur

( 1.68) Total

Million

Short Tons

Percent

of Total

Million

Short Tons

Percent

of Total

Million

Short Tons

Percent

of Total

Million

Short Tons

Percent

of Total

Surface

Appalachia .... 4,311.5 ( 9.5%) 6,785.9 (15.5%) 5,186.3 (16.0%) 16,283.6 (13.4%)

Interior ....... 126.7 ( 0.3%) 7,164.1 (16.4%) 20,544.2 (63.4%) 27,835.1 (22.9%)

West ......... 40,963.3 (90.2%) 29,801.5 (68.1%) 6,686.2 (20.6%) 77,451.0 (63.7%)

U.S. Total ..... 45,401.5 (100.0%) 43,751.6 (100.0%) 32,416.6 (100.0%) 121,569.7 (100.0%)

Underground

Appalachia .... 7,363.5 (13.4%) 13,550.8 (32.9%) 18,096.7 (31.4%) 39,011.0 (25.4%)

Interior ....... 642.1 ( 1.2%) 2,877.1 ( 7.0%) 37,421.3 (65.0%) 40,940.5 (26.7%)

West ......... 46,812.1 (85.4%) 24,727.3 (60.1%) 2,082.0 ( 3.6%) 73,621.4 (47.9%)

U.S. Total ..... 54,817.7 (100.0%) 41,155.2 (100.0%) 57,600.0 (100.0%) 153,572.9 (100.0%)

Total

Appalachia .... 11,675.0 (11.6%) 20,336.7 (24.0%) 23,283.0 (25.9%) 55,294.7 (20.1%)

Interior ....... 768.8 ( 0.8%) 10,041.2 (11.8%) 57,965.5 (64.4%) 68,775.5 (25.0%)

West ......... 87,775.4 (87.6%) 54,528.8 (64.2%) 8,768.2 ( 9.7%) 151,072.4 (54.9%)

U.S. Total ..... 100,219.2 (100.0%) 84,906.8 (100.0%) 90,016.7 (100.0%) 275,142.6 (100.0%)

 a

For detailed analyses, the EIA uses six sulfur content ranges. For general discussion and summary data, however, those six ranges

are combined into the three qualitative ratings of coal presented here (low-, medium-, and high-sulfur content).

 Notes: Coal supply regions that comprise each coal-producing region above are listed in Table 17. Data may not equal sum of

components due to independent rounding.

 Source: EIA Coal Reserves Data Base program, State geological and mineral resource surveys, and other geological reports.
Energy Information Administration/ U.S. Coal Reserves: 1997 Update 25

22 Energy Information Administration, Coal Industry Annual 1996, DOE/EIA-0584(96) (Washington, DC, November 1997), p. 11. 23 Ibid. p. 41. 24 Ibid. p. 157.

In the West, surface accessibility factors average 91

percent. They are relatively high primarily because of

fewer land use constraints and fewer known physical

minability restrictions than in the East. The Geological

Survey of Wyoming estimated that 98 percent of the

DRB in that State may be accessible. Only in northern

Alaska has EIA estimated a low rate of accessibility (50

percent), because of the difficulties of mining in tundra

and permafrost and the absence of relevant experience

mining under those conditions in the United States.

Surface recovery rates in the West are also high,

averaging 90 percent for accessible coal resources. Many

of the most productive mines recover thick coalbeds (40

to 100 feet are not uncommon), with relatively thin overburden, developed in soft types of rock or unconsolidated sediments. Even in harder rock, where more

blasting is required, the overburden ratios tend to be

low and the mechanical loading of the thicker coalbeds

efficient. Net recovery rates in Western coals may also

tend to be higher in areas such as New Mexico and

Washington, where the coal contains thin partings of

shale that cannot be avoided by mining equipment.

These rock contaminants are mined through, raising the

mined tonnage reported and the apparent rate of

recovery, as the coal is generally not washed. These

coals are accepted for combustion at nearby mine mouth

power plants with 20 percent or more ash-forming

material and lower heat value than if they were cleaned,

but with minimal transportation costs. The reported

rates of recovery, with no losses of product due to coal

cleaning, are therefore very high, compared with typical

Eastern coals, prepared for rail or barge shipment.

Differences in the relationships when comparing underground DRB and estimated recoverable reserves in

Appalachia and the Interior likewise indicate differences

in coal types, markets, and mining patterns (Tables 12

and 14). Appalachian underground coal makes up 23

percent of the DRB but accounts for 25 percent of the

estimated U.S. recoverable reserves. Accessibility is not

as restricted for underground mining in Appalachia and

has fewer restrictions than the surface mines of the

region. Again, the exception to the rule is Pennsylvania

anthracite, where access for deep mining is severely

restricted now and for the foreseeable future as a result

of catastrophic flooding caused by Hurricane Agnes in

1972, drowning many of the mines and impairing

adjacent resources. In general, however, net recovery of

Appalachian deep coal deposits is good, primarily

because much of the coal being mined is relatively highquality, high-Btu fuel. The coal fetches prices that can

support more costly mining technologies, including

longwalls (67 percent of U.S. longwall production is in

Appalachia22).

By contrast, 35 percent of the national DRB for underground mining is found in the Interior Region, but the

estimated recoverable reserves constitute only 27

percent. The coalbeds in the Interior include a high percentage of thick beds, yet the net underground recovery

is relatively low (52 percent versus 58 percent in Appalachia23). This lower recovery correlates with a region of

high average sulfur contents, flat markets, and relatively

low prices ($22.43 for Interior bituminous versus $27.67

for Appalachian bituminous, mined underground, average price per ton for calendar year 199624).

Status of Coal Reserves Data Base

The Coal Reserves Data Base program is EIA’s vehicle

for revision of the DRB, estimated recoverable reserves,

and coal quality allocations. The CRDB data are revised

using coal resource data and coal quality analyses

sampled in and selected for their applicability to the coal

resources. For the coal supply areas where CRDB

projects are not currently feasible, the EIA continues

periodic adjustments of the existing data to account for

resource depletion. This is done to maintain a unified

national database of the remaining DRB and estimated

recoverable reserves adjusted to the latest common

effective date.

A “base year” (Table 15) is the effective date of the

detailed resource assessment for a DRB resource area,

including adjustments for all known coal mined out

and/or lost to mining as of the stated date. Some source

studies on which the DRB is based may be much older

than the base year or may have been done at various

times over a range of years. A latest common effective

date is used to maintain internal database consistency. It

is the “as of” date to which data of varying base years

are adjusted to account for subsequent production and

coal lost in mining.

Although major updates are being made in the CRDB,

some important coal supply areas are still based on 1971

base year DRB data and on allocations performed in the

1980s for the EIA’s Resource Allocation and Mine

Costing (RAMC) model (Table 15). The DRB covers all
26 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

 Table 15. 1997 Status of Database Updates for Energy Information Administration (EIA) Coal Resource

and Reserve Data

Update

Year Base Year Lead Agency State or Producing Area Source Comments

1996 1993

Kentucky

Geological Survey Eastern Kentucky field

1983 coal resource data, State coal

analyses, USGS availability data,

EIA recovery and accessibility data.

1997 1996

Illinois State

Geological Survey Illinois

State coal mapping system, coal

analyses, USGS availability data,

State and EIA recovery data and

accessibility standards.

1994 1993

New Mexico

Bureau of Mines

and Mineral

Resources

New Mexico portion of San Juan Basin

and its southern extensions

State mapping system and coal

quality data, company data, BLM

land use data, State and EIA

depletion and recovery data.

1995 1991 EIA New Mexico portion of Raton Basin

Resource data from published

report, accessibility estimated, EIA

recovery data.

1992 1981 EIA Pennsylvania (anthracite)

Resource data and accessibility

from published study, EIA recovery

estimates.

1992 1991

Geological Survey

of Wyoming

Wyoming, surface-minable

DRB of major coalfields

State coal resource files and

published studies, State coal

analyses and FERC data, USGS

maps for land use, State and EIA

production and active-mines

reserve data.

1991 1991

Ohio

Geological Survey Major coal-bearing counties of Ohio

Resources from new State data

points, State coal analyses, except:

published study for non-priority

counties; accessibility from State

estimates and EIA analysis of

National Forest and roadway

restrictions.

1991

1979

(based on

1946-1980

studies) EIA

Arkansas, Colorado, New Mexico, and

Virginia (anthracite fields), Alaska

(northern), Georgia, Idaho, Michigan,

North Carolina, Oregon

DRBs allocated to Btu/sulfur ranges

using EIA coal quality data and

published coal analyses.

1980-

1986

1971,

(based on

1907-1971

data and

1972-1985

updates)

EIA (core

Resource

Allocation and

Mine Costing

Model file)

Alabama, Alaska (southern), Arizona,

Arkansas, Colorado,* Indiana,* Iowa,

Kansas, Kentucky (western),

Louisiana, Maryland, Missouri,

Montana, North Dakota, Oklahoma,

Pennsylvania (bituminous), South

Dakota, Tennessee, Texas, Utah,*

Virginia, Washington, West Virginia,

Wyoming (underground)

Basic Btu/sulfur allocations done in

1980 and 1986, based on 1971

DRB and extended to various

updated DRB estimates from small

post-1971 studies.

 * Colorado revisions in the Somerset and Yampa Fields are under development. Revisions in Utah are in progress. Revisions in

Indiana are scheduled to begin in January 1999.

States for which there are sufficient coal resource data to

compute a reserve base. Beginning with the 1992 update

year, coal quality allocations were extended to all DRB

data, including those not used in RAMC, for which

allocations had not previously been done. Table 15

summarizes the resource data sources and base years

used in the 1997 DRB and estimated recoverable reserve

updates.
Energy Information Administration/ U.S. Coal Reserves: 1997 Update 27

Acronyms and Abbreviations Used

ASTM American Society for Testing and Materials

BOM U.S. Bureau of Mines

CAS USGS Coal Availability Studies

CRDB Coal Reserves Data Base

CRS BOM Coal Recoverability Studies

DOE U.S. Department of Energy

DRB demonstrated reserve base

EIA Energy Information Administration

FERC Federal Energy Regulatory Commission

GIS geographic information systems

ISGS Illinois State Geological Survey

NCRA National Coal Resource Assessment

NCRDS National Coal Resource Data System

ROM run of mine

USGS U.S. Geological Survey
Energy Information Administration/ U.S. Coal Reserves: 1997 Update 29

Glossary of Selected Coal Classification Terms

accessed&Coal deposits that have been prepared for

mining by construction of portals, shafts, slopes, drifts,

and haulage ways; by removal of overburden; or by

partial mining (see also virgin coal).

accessibility&In reference to coal resources (core

meaning), the absence of land use restrictions and the

assumption that ownership or leaseholds will be

obtainable for mining (see also environmental restrictions, industrial restrictions). Many technological

restrictions were traditionally applied as demonstrated

reserve base criteria, but (extended meaning) with the

advent of available resource studies, specific technologic restrictions may be incorporated in accessibility

factors (see also restricted resources).

accessibility factor&The estimated regional ratio of

accessible reserve base to the demonstrated reserve

base or of accessible resources to identified resources.

accessible reserve base&The portion of the

demonstrated reserve base estimated by EIA to be

accessible, determined by application of one or more

accessibility factors within an area. An accessible

reserve base may be referred to as accessible resources

because it is a subset of accessible resources and is

usually part of a single resource study.

accessible resources&The portion of identified

resources estimated to be accessible, determined by

application of one or more accessibility factors within

an area.

as-received condition or as-received basis&Represents

an analysis of a sample as received at a laboratory.

availability&In reference to coal resources, the absence

of land-use or environmental restrictions and technological restrictions.

available reserves&In EIA coal supply modeling, the

difference between estimated recoverable reserves and

recoverable reserves at active mines; in modeling

context, these reserves are considered not presently

obligated for existing mines and, therefore, would be

available to supply new mines in the future.

available resources&In U.S. Geological Survey studies,

the quantity of remaining identified resources available

for development and potential extraction at the time of

determination after adjusting for geologic considerations, land-use restrictions, and/or technological

restrictions (see also accessible reserve base).

bed, coalbed&All the coal and partings lying between a

roof and floor.

bench&A subdivision and (or) layer of a coal bed

separated from other layers by partings of non-coal rock.

clean coal yield&In EIA models, the portion of reserves

that will be salable coal after preparation, if any is done

(see salable coal).

coal&A readily combustible rock containing more than

50 percent by weight and more than 70 percent by

volume of carbonaceous material, including inherent

moisture. It is formed from plant remains that have been

compacted, indurated, chemically altered, and

metamorphosed by heat and pressure during geologic

time. Discussion: Differences in the kinds of plant

materials, in the degree of metamorphism (rank), and in

the range of impurities are characteristic of coal and are

used in coal classification. Impure coal/coaly material

containing more than 33 weight percent ash is excluded

from resources and reserve estimates unless the ash is

largely in associated partings so that the coal is cleanable

to less than 33 weight percent ash.

coal preparation/washing&The treatment of coal to

reject waste. In its broadest sense, preparation is any

processing of mined coal to prepare it for market,

including crushing and screening or sieving the coal to

reach a uniform size, which normally results in removal

of some non-coal material. The term coal preparation

most commonly refers to processing, including crushing

and screening, passing the material through one or more

processes to remove impurities, sizing the product, and

loading for shipment. Many of the processes separate

rock, clay, and other minerals from coal in a liquid

medium; hence the term washing is widely used. In

some cases coal passes through a drying step before

loading.
30 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

coal-producing region&An area that collectively

encompasses a group of geographically contiguous or

logically associated States or areas that currently or

historically mine and market coal.

coal sampling&The collection and proper storage and

handling of a relatively small quantity of coal for

laboratory analysis. Sampling may be done for a wide

range of purposes, such as: coal resource exploration

and assessment, characterization of the reserves or

production of a mine, to characterize the results of coal

cleaning processes, to monitor coal shipments or receipts

for adherence to coal quality contract specifications, or

to subject a coal to specific combustion or reactivity tests

related to the customer’s intended use. During predevelopment phases, such as exploration and resource

assessment, sampling typically is from natural outcrops,

test pits, old or existing mines in the region, drill

cuttings, or drilled cores. Characterization of a mine’s

reserves or production may use sample collection in the

mine, representative cuts from coal conveyors or from

handling and loading equipment, or directly from

stockpiles or shipments (coal rail cars or barges).

Contract specifications rely on sampling from the

production flow at the mining or coal handling facility

or at the loadout, or from the incoming shipments at the

receiver’s facility. In all cases, the value of a sample

taken depends on its being representative of the coal

under consideration, which in turn requires that

appropriate sampling procedures be carefully followed.

For coal resource and estimated reserve characterization,

appropriate types of samples include:

face channel or channel sample&a sample taken

at the exposed coal in a mine by cutting away any

loose or weathered coal then collecting on a clean

surface a sample of the coal seam by chopping out

a channel of uniform width and depth; a face

channel or face sample is taken at or near the

working face, the most freshly exposed coal where

actual removal and loading of mined coal is taking

place. Any partings greater than 3/8 inch and/or

mineral concretions greater than 1⁄2 inch thick and

2 inches in maximum diameter are normally

discarded from a channel sample so as better to

represent coal that has been mined, crushed, and

screened to remove at least gross non-coal

materials. 

column sample&a channel or drill core sample

taken to represent the entire geologic coalbed; it

includes all partings and impurities that may exist

in the coalbed.

bench sample&a face or channel sample taken of

just that contiguous portion of a coalbed that is

considered practical to mine, also known as a

"bench;" For example, bench samples may be taken

of minable coal where impure coal that makes up

part of the geologic coalbed is likely to be left in the

mine, or where thick partings split the coal into

two or more distinct minable seams, or where

extremely thick coalbeds cannot be recovered by

normal mining equipment, so that the coal is

mined in multiple passes, or benches, usually

defined along natural bedding planes.

composite sample&a recombined coalbed sample

produced by averaging together thicknessweighted coal analyses from partial samples of the

coalbed, such as from one or more bench samples,

from one or more mine exposures or outcrops

where the entire bed could not be accessed in one

sample, or from multiple drill cores that were

required to retrieve all local sections of a coal

seam.

coal supply region&An area in which the EIA coal

reserves data are aggregated and allocated to a set of

uniform, typical criteria for purposes of modeling. The

criteria of a coal supply region may include coal heat

and sulfur content or other quality parameters, coal

rank, geographic continuity, traditional mining regions,

State or county boundaries, transportation corridors and

barriers, and marketing factors. Coal supply regions

may vary for different modeling criteria; they may

include the coal reserves of an entire State or a

contiguous group of States; some major producing States

may be split into more than one region.

coal zone&A series of laterally extensive and (or)

lenticular coal beds and associated strata that arbitrarily

can be viewed as a unit. Generally, the coal beds in a

coal zone are assigned to the same geologic member or

formation.

coalbed&All the coal and partings lying between a roof

and floor.

committed reserves&In EIA coal supply modeling,

synonymous with recoverable reserves at active mines;

in modeling context, these reserves are considered

obligated for existing mines and, therefore, not part of

the reserves that would be available to supply new

mines in the future.
Energy Information Administration/ U.S. Coal Reserves: 1997 Update 31

compliance coal&A coal or a blend of coals that meets

sulfur dioxide emission standards for air quality without

the need for flue gas desulfurization.

cumulative depletion&The sum in tons of coal extracted

and lost in mining to a stated date for a specified area or

a specified coal bed.

demonstrated reserve base (DRB)&A collective term for

the sum of coal in both measured and indicated resource

categories of reliability; the DRB represents 100 percent

of coal in place as of a certain date. Includes beds of

bituminous coal and anthracite 28 inches or more thick

and beds of subbituminous coal 60 inches or more thick

that can be surface mined. Includes also thinner and/or

deeper beds that presently are being mined or for which

there is evidence that they could be mined commercially

at this time. Represents that portion of the identified

resources of coal from which reserves are calculated.

demonstrated resources&Same qualifications as identified resources, but includes measured and indicated

degrees of geologic assurance and excludes the inferred.

depleted resources&Resources that have been mined;

includes coal recovered, coal lost in mining, and coal

rendered subeconomic as a result of mining the

recovered coal. See cumulative depletion.

depletion&The subtraction of both the tonnage

produced and the tonnage lost in mining from the

demonstrated reserve base and identified resources to

determine the remaining tonnage as of a certain time.

depletion factor&The multiplier of the tonnage

produced that takes into account both the tonnage

recovered and the tonnage lost due to mining. The

depletion factor is the reciprocal of the recovery factor in

relation to a given quantity of production.

dry, mineral-matter-free basis&A type of calculated

analytical value of a coal sample expressed as if the total

moisture and mineral matter had been removed. Mineral

matter free is not the same as ash free.

economic&Term that implies that profitable extraction

or production under realistic investment assumptions

has been established, analytically demonstrated, or

assumed with reasonable certainty.

environmental restrictions&Land-use or subsurface

restrictions that constrain, postpone, or prohibit mining

in order to protect environmental resources of an area;

for example, surface- or groundwater quality, air quality

affected by mining, or plants or animals or their habitats.

estimate&A determination as to the amount or tonnage

of coal in an area. The term estimate indicates that the

quantities of resources are known imprecisely. An

estimate differs from an assessment, which is an analysis

of all data concerning an area's coal resources and

reserves with the objective of reaching a judgment about

the geologic nature and economic potential of the coal

resources and reserves of the area.

estimated recoverable reserves&See recoverable

reserves.

floor&The upper surface of the stratum underlying a

coal seam. In coals that were formed in persistent

swamp environments, the floor is typically a bed of clay,

known as "underclay," representing the soil in which the

trees or other coal-forming swamp vegetation was

rooted.

geologic assurance&State of sureness, confidence, or

certainty of the existence of a quantity of resources

based on the distance from points where coal is

measured or sampled and on the abundance and quality

of geologic data as related to thickness of overburden,

rank, quality, thickness of coal, areal extent, geologic

history, structure, and correlations of coal beds and

enclosing rocks. The degree of assurance increases as the

nearness to points of control, abundance, and quality of

geologic data increases.

geologic considerations&Conditions in the coal deposit

or in the rocks in which it occurs that may complicate or

preclude mining. Geologic considerations are evaluated

in the context of the current state of technology and

regulations, so the impact on mining may change with

time.

grade (of coal)&See quality.

hypothetical resources&Undiscovered coal resources in

beds that may reasonably be expected to exist in known

mining districts under known geologic conditions. In

general, hypothetical resources are in broad areas of

coalfields where points of observation are absent and

evidence is from distant outcrops, drill holes, or wells.

Exploration that confirms their existence and better

defines their quantity and quality would permit their

reclassification as identified resources. Quantitative

estimates are based on a broad knowledge of the

geologic character of coalbed or region. Measurements
32 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

of coal thickness are more than 6 miles apart. The

assumption of continuity of coalbed is supported only

by geologic evidence.

identified resources&Specific bodies of coal whose

location, rank, quality, and quantity are known from

geologic evidence supported by engineering measurements. Included are beds of bituminous coal and

anthracite 14 inches or more thick and beds of

subbituminous coal and lignite 30 inches or more thick

that occur at depths to 6,000 feet and whose existence

and quantity have been delineated within specified

degrees of geologic assurance as measured, indicated, or

inferred.

indicated resources&Coal for which estimates of the

rank, quality, and quantity have been computed partly

from sample analyses and measurements and partly

from reasonable geologic projections. Indicated

resources are computed partly from specified measurements and partly from projection of visible data for a

reasonable distance on the basis of geologic evidence.

The points of observation are 0.5 to 1.5 miles apart.

Indicated coal is projected to extend as a 0.5-mile-wide

belt that lies more than 0.25 miles from the outcrop or

points of observation or measurement.

industrial restrictions&Land-use restrictions that constrain, postpone, or prohibit mining in order to meet

other industrial needs or goals; for example, resources

not mined due to safety concerns or due to industrial or

societal priorities, such as to preserve oil or gas wells

that penetrate the coal reserves; to protect surface

features such as pipelines, power lines, or company

facilities; or to preserve public or private assets, such as

highways, railroads, parks, or buildings.

inferred reserve base&the resources in the inferred

reliability category that meet the same criteria of bed

thickness and depth from surface as the demonstrated

reserve base.

inferred resources&Coal in unexplored extensions of

demonstrated resources for which estimates of the

quality and size are based on geologic evidence and

projection. Quantitative estimates are based largely on

broad knowledge of the geologic character of the bed or

region and where few measurements of bed thickness

are available. The estimates are based primarily on an

assumed continuation from demonstrated coal for which

there is geologic evidence. The points of observation are

1.5 to 6 miles apart. Inferred coal is projected to extend

as a 2.25-mile-wide belt that lies more than 0.75 miles

from the outcrop or points of observation or

measurement.

isopach&A line on a map drawn through points of equal

thickness of a designated unit (such as a coal bed).

land-use restrictions&Constraints placed upon mining

by societal policies to protect surface features or entities

that could be affected by mining. Because laws and

regulations may be modified or repealed, the restrictions, including industrial and environmental restrictions, are subject to change.

marginal reserves&Borders on being economic. See

economic.

measured resources&Coal for which estimates of the

rank, quality, and quantity have been computed, within

a high degree of geologic assurance, from sample

analyses and measurements from closely spaced and

geologically well known sample sites. Measured

resources are computed from dimensions revealed in

outcrops, trenches, mine workings, and drill holes. The

points of observation and measurement are so closely

spaced and the thickness and extent of coals are so well

defined that (for older estimates) the tonnage was

judged to be accurate within 20 percent of true tonnage

(statistical measures of error are no longer considered

reliable for most measured resources). Although the

spacing of the points of observation necessary to

demonstrate continuity of the coal differs from region to

region according to the character of the coalbeds, the

points of observation are not greater than 0.5 mile apart.

Measured coal is projected to extend as a 0.25-mile-wide

belt from the outcrop or points of observation or

measurement.

minable&Capable of being mined under current mining

technology and environmental and legal restrictions,

rules, and regulations.

original (resources/reserves)&The amount of coal in the

ground before any production.

overburden&Any material, consolidated or unconsolidated, that lies between a coal deposit and the surface.

Overburden is reported in feet and (or) meters and used

to classify the depth to an underlying coal bed.

preparation plant&Broadly speaking, any facility where

coal is prepared for market; usual accepted meaning is

a rather elaborate collection of facilities where coal is

separated from its impurities, washed and sized, and
Energy Information Administration/ U.S. Coal Reserves: 1997 Update 33

loaded for shipment. Also known as a wash plant or

coal washer.

quality or grade&An informal classification of coal

relating to its suitability for use for a particular purpose.

Refers to individual measurements such as heat value,

fixed carbon, moisture, ash, sulfur, phosphorus, major,

minor, and trace elements, coking properties, petrologic

properties, and particular organic constituents. The

individual quality elements may be aggregated in

various ways to classify coal for such special purposes as

metallurgical, gas, petrochemical, and blending usages.

rank&The classification of coal relative to other coals,

according to their degree of metamorphism, or progressive alteration, in the natural series from lignite to

anthracite (Standard Classification of Coal by Rank,

1992, American Society for Testing and Materials, ASTM

Designation D%388%91a).

recoverability&In reference to accessible coal resources,

the condition of being physically, technologically, and

economically minable. Recovery rates and recovery

factors may be determined or estimated for coal

resources without certain knowledge of their economic

minability; therefore, the availability of recovery rates or

factors does not predict recoverability.

recoverable coal&Coal that is, or can be, extracted from

a coal bed during mining.

recoverable reserves, estimated recoverable reserves&Reserve estimates (broad meaning) based on a

demonstrated reserve base adjusted for assumed

accessibility factors and recovery factors. The term is

used by EIA to distinguish estimated recoverable

reserves, which are derived without specific economic

feasibility criteria by factoring (downward) from a

demonstrated reserve base for one or more study areas

or regions, from recoverable reserves at active mines,

which are aggregated (upward) from reserve estimates

reported by currently active, economically viable mines

on Form EIA%7A.

recoverable reserves at active mines&The amount of in

situ coal that can be recovered by mining existing

reserves at mines reporting on Form EIA-7A (see

committed reserves).

recovery factor&The percentage of total tons of coal

estimated to be recoverable from a given area in relation

to the total tonnage estimated to be in the demonstrated

reserve base. For the purpose of calculating depletion

factors only, the estimated recovery factors for the

demonstrated reserve base generally are 50 percent for

underground mining methods and 80 percent for

surface mining methods. More precise recovery

factors can be computed by determining the total coal in

place and the total coal recoverable in any specific locale.

recovery percentage/rate&The ratio of coal extracted

from a bed as compared to the total quantity of coal

originally in the bed. 

remaining (resources/reserves)&The amount of coal in

the ground after some mining, excluding coal in the

ground spoiled or left in place for which later recovery

is not feasible.

regional reserves, regional reserve estimates&Same as

reserves; alternative wording is used by EIA to

distinguish regional reserves, which are derived by

factoring (downward) from a demonstrated reserve base

for one or more study areas or regions, from reserves at

active mines, which are aggregated (upward) from

reserve estimates reported by individual mines on Form

EIA-7A.

remaining (resources/reserves)&The amount of coal in

the ground after some mining, excluding coal in the

ground spoiled or left in place for which later recovery

is not feasible.

reserve(s)&Root meaning: The amount of in-situ coal in

a defined area that can be recovered by mining at a

sustainable profit at the time of determination. Broad

meaning: That portion of the demonstrated reserve base

that is estimated to be recoverable at the time of

determination. The reserve is derived by applying a

recovery factor to that component of the identified

resources of coal designated as the demonstrated

reserve base.

reserves at active mines&The amount of in situ coal that

can be recovered by mining existing reserves at mines

reporting on Form EIA-7A (see committed reserves).

resources&Naturally occurring concentrations or

deposits of coal in the Earth's crust, in such forms and

amounts that economic extraction is currently or

potentially feasible.

restricted coal resources&In U.S. Geological Survey

studies, the quantity of remaining resources that is not

available for development at the time of determination

because of geologic considerations, land-use restrictions, and/or technological restrictions.
34 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

restricted resources&Those parts of any resource

category that are restricted or prohibited from extraction

by laws or regulations. Also, coal or a portion of the

coal in categorically minable depths or thicknesses that

is not economic at the time of determination.

roof&The rock immediately above a coal seam. The roof

is commonly a shale, often carbonaceous and softer than

rocks higher up in the roof strata.

run-of-mine&The raw coal recovered from a mine, prior

to any treatment.

salable coal&The shippable product of a coal mine or

preparation plant. Depending on customer specifications, salable coal may be run-of-mine, crushed-andscreened (sized) coal, or the clean coal yield from a

preparation plant. 

sample&A representative fraction of a coal bed collected

by approved methods, guarded against contamination

or adulteration, and analyzed to determine the nature;

chemical, mineralogic, and (or) petrographic

composition; percentage or parts-per-million content of

specified constituents; heat value; and possibly the

reactivity of the coal or its constituents.

seam&A bed of coal lying between a roof and floor.

Equivalent term to bed, commonly used by industry.

speculative resources&Undiscovered coal in beds that

may occur either in known types of deposits in a

favorable geologic setting where no discoveries have

been made, or in deposits that remain to be recognized.

Exploration that confirms their existence and better

defines their quantity and quality would permit their

reclassification as identified resources.

strip or stripping ratio&The amount of overburden that

must be removed to gain access to a unit amount of coal.

Discussion: A stripping ratio may be expressed as

(1) thickness of overburden to thickness of coal, (2)

volume of overburden to volume coal, (3) weight of

overburden to weight of coal, or (4) cubic yards of

overburden to tons of coal. A stripping ratio commonly is used to express the maximum thickness,

volume, or weight of overburden that can be

profitably removed to obtain a unit amount of coal.

strip or surface mining&The extraction of coal by using

surface mining methods such as area strip mining,

contour strip mining, or open-pit mining. The

overburden covering the coal is removed and the coal

extracted using power shovels, front-end loaders, or

similar heavy equipment.

technological restrictions&Constraints related to economics and safety placed upon mining by contemporary

technology or prescribed by law; the restrictions may

change with advances in science or modifications in the

law. For purposes of assessing impacts on minability,

geologic considerations are included as technological

restrictions. A secondary basis for accessibility is the

technological restrictions that may affect economic

minability of specific coal resources in a locality at the

time of the evaluation. Technological restrictions include

constraints on the economic or safe mining of the coal

with contemporary technologies, which constraints are

related to the nature of the coalbeds or local geology; for

example, specific coalbed thickness or overburden

characteristics known to deter economic mining of coal

meeting broad regional DRB criteria, localized geologic

structural problems, or unsafe or illegal proximity to

another mine. 

underground mining&The extraction of coal or its

products from between enclosing rock strata by

underground mining methods, such as room and pillar,

longwall, and shortwall, or through in-situ gasification.

undiscovered resources&Unspecified bodies of coal

surmised to exist on the basis of broad geologic

knowledge and theory. Undiscovered resources include

beds of bituminous coal and anthracite 14 inches or

more thick and beds of subbituminous coal and lignite

30 inches or more thick that are presumed to occur in

unmapped and unexplored areas to depths of 6,000 feet.

The speculative and hypothetical resource categories

comprise undiscovered resources.

virgin coal&Coal that has not been accessed by mining.

See accessed.
Appendix A

Detailed Estimates of

Demonstrated

Reserve Base and

Estimated Recoverable

Reserves for U.S. Coal

by Heat and Sulfur

Content
Energy Information Administration/ U.S. Coal Reserves: 1997 Update 37

Table A1. Estimates of the Demonstrated Reserve Base of Coal by Btu/Sulfur Range, State, and Type 

of Mining

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

Alabama - Surface

< 15 . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 1,083.0 0.0 0.0 1,083.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 161.7 238.1 602.5 190.7 0.0 1,192.9

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 193.6 136.9 650.0 0.0 0.0 980.4

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 355.2 375.0 2,335.4 190.7 0.0 3,256.3

Alabama - Underground

< 15 . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 138.5 197.8 272.9 107.8 0.0 716.9

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 158.4 0.0 415.0 0.0 0.0 573.4

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 296.9 197.8 687.8 107.8 0.0 1,290.2

Alabama - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 1,083.0 0.0 0.0 1,083.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 300.1 435.9 875.3 298.4 0.0 1,909.7

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 352.0 136.9 1,064.9 0.0 0.0 1,553.8

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 652.1 572.8 3,023.2 298.4 0.0 4,546.6

Alaska, South - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 14.0 0.0 0.0 0.0 0.0 0.0 14.0

15-19.99 .................... 470.2 51.6 0.0 0.0 0.0 0.0 521.8

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 484.2 51.6 0.0 0.0 0.0 0.0 535.8

Alaska, South - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 .................... 4,083.2 87.2 0.0 0.0 0.0 0.0 4,170.4

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 17.6 0.0 0.0 0.0 0.0 17.6

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 4,083.2 104.8 0.0 0.0 0.0 0.0 4,188.0

Alaska, South - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 14.0 0.0 0.0 0.0 0.0 0.0 14.0

15-19.99 .................... 4,553.4 138.8 0.0 0.0 0.0 0.0 4,692.2

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 17.6 0.0 0.0 0.0 0.0 17.6

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 4,567.4 156.4 0.0 0.0 0.0 0.0 4,723.8

Alaska, North - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 .................... 17.4 4.9 3.9 2.4 0.0 0.0 28.5

20-22.99 .................... 77.3 39.1 0.0 0.0 0.0 0.0 116.3

23-25.99 .................... 16.7 5.7 0.0 0.0 0.0 0.0 22.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 111.3 49.6 3.9 2.4 0.0 0.0 167.2

Alaska, North - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 .................... 129.4 36.1 28.3 17.9 0.0 0.0 211.7

20-22.99 .................... 569.4 286.5 0.0 0.0 0.0 0.0 855.9

23-25.99 .................... 125.6 41.9 0.0 0.0 0.0 0.0 167.5

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 824.3 364.4 28.3 17.9 0.0 0.0 1,235.0

Alaska, North - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 .................... 146.8 40.9 32.2 20.3 0.0 0.0 240.2

20-22.99 .................... 646.7 325.5 0.0 0.0 0.0 0.0 972.2

23-25.99 .................... 142.2 47.6 0.0 0.0 0.0 0.0 189.9

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 935.6 414.1 32.2 20.3 0.0 0.0 1,402.2

 See notes at end of table.
Table A1. Estimates of the Demonstrated Reserve Base of Coal by Btu/Sulfur Range, State, and Type

of Mining (Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

38 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

Arizona - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 59.3 0.0 0.0 0.0 0.0 59.3

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 59.3 0.0 0.0 0.0 0.0 59.3

Arizona - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 101.6 0.0 0.0 0.0 0.0 101.6

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 101.6 0.0 0.0 0.0 0.0 101.6

Arizona - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 160.9 0.0 0.0 0.0 0.0 160.9

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 160.9 0.0 0.0 0.0 0.0 160.9

Arkansas - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 25.3 0.0 0.0 25.3

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.5 0.5

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 2.2 104.2 9.2 1.5 1.5 118.7

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 2.2 104.2 34.5 1.5 2.0 144.4

Arkansas - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 1.9 1.9

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 14.2 192.7 43.5 10.1 10.1 270.6

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 14.2 192.7 43.5 10.1 12.0 272.5

Arkansas - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 25.3 0.0 0.0 25.3

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 2.4 2.4

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 16.3 296.9 52.8 11.7 11.7 389.3

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 16.3 296.9 78.0 11.7 14.0 416.9

Colorado - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 4,189.9 0.0 0.0 0.0 4,189.9

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 .................... 144.1 0.0 10.5 12.4 0.0 0.0 166.9

23-25.99 .................... 191.6 143.5 25.2 39.2 17.6 0.0 417.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 3.6 0.0 0.0 0.0 0.0 3.6

Total ....................... 335.6 147.1 4,225.5 51.6 17.6 0.0 4,777.4

Colorado - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 .................... 2,666.2 1,099.1 64.4 0.0 0.0 0.0 3,829.6

20-22.99 .................... 1,418.7 1,564.4 239.3 151.7 0.0 0.0 3,374.1

23-25.99 .................... 2,159.1 1,214.1 311.1 306.3 155.1 0.0 4,145.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 201.0 281.5 65.2 81.6 0.0 0.0 629.2

Total ....................... 6,445.0 4,159.0 679.9 539.6 155.1 0.0 11,978.5

Colorado - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 4,189.9 0.0 0.0 0.0 4,189.9

15-19.99 .................... 2,666.2 1,099.1 64.4 0.0 0.0 0.0 3,829.6

20-22.99 .................... 1,562.8 1,564.4 249.7 164.1 0.0 0.0 3,541.1

23-25.99 .................... 2,350.6 1,357.6 336.3 345.5 172.6 0.0 4,562.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 201.0 285.1 65.2 81.6 0.0 0.0 632.8

Total ....................... 6,780.6 4,306.1 4,905.4 591.2 172.6 0.0 16,755.9

 See notes at end of table.
Table A1. Estimates of the Demonstrated Reserve Base of Coal by Btu/Sulfur Range, State, and Type

of Mining (Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

Energy Information Administration/ U.S. Coal Reserves: 1997 Update 39

Georgia - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.1 0.0 0.2 0.0 0.0 0.2

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.3 0.5 0.5 0.0 0.1 0.1 1.5

Total . . . . . . . . . . . . . . . . . . . . . . . 0.3 0.6 0.5 0.2 0.1 0.1 1.7

Georgia - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.1 0.0 0.1 0.0 0.0 0.2

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.8 0.3 0.2 0.1 0.2 0.2 1.7

Total . . . . . . . . . . . . . . . . . . . . . . . 0.8 0.4 0.2 0.2 0.2 0.2 1.9

Georgia - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.2 0.0 0.3 0.0 0.0 0.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 1.1 0.8 0.6 0.1 0.3 0.3 3.2

Total . . . . . . . . . . . . . . . . . . . . . . . 1.1 1.0 0.6 0.4 0.3 0.3 3.6

Idaho - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Idaho - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.3 2.1 1.0 1.0 0.0 0.0 4.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.3 2.1 1.0 1.0 0.0 0.0 4.4

Idaho - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.3 2.1 1.0 1.0 0.0 0.0 4.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.3 2.1 1.0 1.0 0.0 0.0 4.4

Illinois - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 8.8 122.0 130.8

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 4.2 293.6 500.7 14,095.5 14,893.9

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 1.4 45.9 80.4 1,456.0 1,583.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 5.5 339.5 589.9 15,673.5 16,608.4

Illinois - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 .................... 199.4 683.7 1,088.6 2,867.4 2,438.8 48,004.8 55,282.8

23-25.99 . . . . . . . . . . . . . . . . . . . . 2.4 33.9 251.0 1,502.0 1,503.4 29,875.6 33,168.3

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 9.5 9.5

Total ....................... 201.9 717.7 1,339.6 4,369.3 3,942.2 77,889.9 88,460.5

Illinois - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 8.8 122.0 130.8

20-22.99 .................... 199.4 683.7 1,092.8 3,161.0 2,939.5 62,100.3 70,176.7

23-25.99 . . . . . . . . . . . . . . . . . . . . 2.4 33.9 252.3 1,547.8 1,583.7 31,331.6 34,751.9

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 9.5 9.5

Total ....................... 201.9 717.7 1,345.1 4,708.8 4,532.0 93,563.4 105,068.9

 See notes at end of table.
Table A1. Estimates of the Demonstrated Reserve Base of Coal by Btu/Sulfur Range, State, and Type

of Mining (Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

40 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

Indiana - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 67.5 34.7 144.5 0.0 262.5 509.2

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 35.0 9.3 28.9 241.1 233.1 547.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 102.5 44.0 173.4 241.1 495.6 1,056.7

Indiana - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 335.6 263.2 744.6 1,272.7 2,353.2 4,969.2

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 262.6 116.5 621.6 1,080.2 1,809.6 3,890.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 598.2 379.8 1,366.2 2,352.9 4,162.8 8,859.8

Indiana - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 403.1 298.0 889.1 1,272.7 2,615.7 5,478.5

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 297.6 125.8 650.5 1,321.4 2,042.7 4,438.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 700.7 423.8 1,539.6 2,594.0 4,658.4 9,916.5

Iowa - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 457.0 0.0 457.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 457.0 0.0 457.0

Iowa - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 187.3 1,545.2 1,732.5

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 187.3 1,545.2 1,732.5

Iowa - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 644.3 1,545.2 2,189.5

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 644.3 1,545.2 2,189.5

Kansas - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 75.9 432.7 508.6

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 246.2 151.7 397.9

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 68.4 68.4

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 322.1 652.9 975.0

Kansas - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Kansas - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 75.9 432.7 508.6

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 246.2 151.7 397.9

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 68.4 68.4

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 322.1 652.9 975.0

 See notes at end of table.
Table A1. Estimates of the Demonstrated Reserve Base of Coal by Btu/Sulfur Range, State, and Type

of Mining (Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

Energy Information Administration/ U.S. Coal Reserves: 1997 Update 41

Kentucky, Eastern - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 19.7 49.3 157.9 39.5 138.2 404.6

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 197.4 118.4 197.4 207.2 207.2 927.7

23-25.99 . . . . . . . . . . . . . . . . . . . . 9.9 552.7 730.3 759.9 375.0 355.3 2,783.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 236.9 2,161.3 1,125.1 1,381.6 592.1 227.0 5,724.0

Total ....................... 246.7 2,931.1 2,023.1 2,496.8 1,213.9 927.7 9,839.3

Kentucky, Eastern - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 4.5 11.3 36.1 9.0 31.6 92.4

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 45.1 27.0 45.1 47.3 47.3 211.9

23-25.99 . . . . . . . . . . . . . . . . . . . . 2.3 126.2 166.8 173.5 85.7 81.1 635.5

26+ . . . . . . . . . . . . . . . . . . . . . . . . 54.1 493.6 256.9 315.5 135.2 51.8 1,307.1

Total ....................... 56.3 669.3 462.0 570.2 277.2 211.9 2,246.9

Kentucky, Eastern - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 24.2 60.6 194.0 48.5 169.7 497.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 242.5 145.5 242.5 254.6 254.6 1,139.5

23-25.99 .................... 12.1 678.9 897.1 933.4 460.7 436.4 3,418.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 290.9 2,654.8 1,382.0 1,697.2 727.4 278.8 7,031.1

Total ....................... 303.1 3,600.4 2,485.1 3,067.0 1,491.1 1,139.5 12,086.2

Kentucky, Western - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 59.0 696.1 666.5 1,421.6

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 139.1 744.2 1,354.2 2,237.5

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 29.4 5.1 34.5

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 198.0 1,469.7 2,025.7 3,693.5

Kentucky, Western -Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 13.8 1,880.3 2,655.8 4,549.8

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 59.9 1,848.1 9,120.6 11,028.5

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 472.0 210.6 682.6

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 73.6 4,200.3 11,986.9 16,260.9

Kentucky, Western - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 72.7 2,576.4 3,322.3 5,971.4

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 199.0 2,592.3 10,474.7 13,266.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 501.4 215.6 717.1

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 271.7 5,670.1 14,012.7 19,954.4

Louisiana - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 462.7 0.0 0.0 462.7

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 462.7 0.0 0.0 462.7

Louisiana - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Louisiana - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 462.7 0.0 0.0 462.7

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 462.7 0.0 0.0 462.7

 See notes at end of table.
Table A1. Estimates of the Demonstrated Reserve Base of Coal by Btu/Sulfur Range, State, and Type

of Mining (Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

42 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

Maryland - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 23.5 0.0 23.5

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 3.9 11.5 18.5 22.9 0.0 56.8

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 3.9 11.5 18.5 46.3 0.0 80.2

Maryland - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 194.0 0.0 194.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 50.9 88.6 188.2 115.2 0.0 442.8

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 50.9 88.6 188.2 309.1 0.0 636.8

Maryland - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 217.4 0.0 217.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 54.8 100.2 206.6 138.0 0.0 499.6

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 54.8 100.2 206.6 355.5 0.0 717.0

Michigan - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.1 0.0 0.1

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.2 0.6 0.1 0.1 0.9

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.5 2.0 0.5 0.3 3.2

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.2 0.1 0.0 0.4

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.7 2.7 0.8 0.4 4.6

Michigan - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.8 0.0 0.8

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 6.6 10.3 6.8 6.5 30.2

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 10.6 32.1 21.7 17.3 81.8

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 4.8 5.6 0.0 10.4

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 17.2 47.2 34.8 23.9 123.1

Michigan - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.9 0.0 0.9

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 6.8 10.8 6.8 6.6 31.1

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 11.1 34.1 22.2 17.6 85.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 5.0 5.7 0.0 10.7

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 17.9 49.9 35.6 24.2 127.7

Missouri - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 77.8 2,822.7 2,900.5

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 136.7 1,437.7 1,574.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 40.0 40.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 214.5 4,300.4 4,514.9

Missouri - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 6.2 1,181.9 1,188.1

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 35.8 239.7 275.5

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 15.5 15.5

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 42.0 1,437.1 1,479.1

Missouri - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 84.0 4,004.6 4,088.6

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 172.5 1,677.4 1,849.9

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 55.5 55.5

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 256.5 5,737.6 5,994.1

 See notes at end of table.
Table A1. Estimates of the Demonstrated Reserve Base of Coal by Btu/Sulfur Range, State, and Type

of Mining (Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

Energy Information Administration/ U.S. Coal Reserves: 1997 Update 43

Montana - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 1,860.3 3,720.6 5,842.3 1,546.2 1,860.3 930.2 15,759.8

15-19.99 .................... 20,125.1 4,957.5 5,979.9 1,497.4 184.1 214.5 32,958.3

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 21,985.4 8,678.1 11,822.2 3,043.6 2,044.4 1,144.7 48,718.2

Montana - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 .................... 30,392.2 19,000.9 14,303.9 4,472.8 676.9 726.3 69,573.0

20-22.99 .................... 349.6 422.9 70.5 211.0 137.8 193.5 1,385.4

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 30,741.8 19,423.8 14,374.4 4,683.8 814.7 919.8 70,958.4

Montana - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 1,860.3 3,720.6 5,842.3 1,546.2 1,860.3 930.2 15,759.8

15-19.99 .................... 50,517.3 23,958.4 20,283.8 5,970.2 861.0 940.8 102,531.3

20-22.99 .................... 349.6 422.9 70.5 211.0 137.8 193.5 1,385.4

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 52,727.2 28,101.9 26,196.6 7,727.4 2,859.1 2,064.5 119,676.5

New Mexico - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 1,045.2 1,214.9 2,194.4 0.0 0.0 4,454.4

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 479.7 397.4 884.6 0.0 0.0 1,761.8

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 10.0 0.0 7.3 0.0 0.0 17.3

26+ . . . . . . . . . . . . . . . . . . . . . . . . 45.1 0.0 0.0 0.0 0.0 0.0 45.1

Total ....................... 45.1 1,534.9 1,612.3 3,086.3 0.0 0.0 6,278.6

New Mexico - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 1,225.6 516.4 1,423.2 0.0 0.0 3,165.2

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 843.5 604.2 654.2 0.0 0.0 2,102.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 565.2 0.3 31.8 0.0 0.0 597.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 48.8 289.9 0.9 0.0 0.0 0.0 339.6

Total ....................... 48.8 2,924.3 1,121.8 2,109.2 0.0 0.0 6,204.1

New Mexico - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 2,270.8 1,731.3 3,617.5 0.0 0.0 7,619.6

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 1,323.3 1,001.6 1,538.8 0.0 0.0 3,863.8

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 575.2 0.3 39.2 0.0 0.0 614.7

26+ . . . . . . . . . . . . . . . . . . . . . . . . 93.9 289.9 0.9 0.0 0.0 0.0 384.7

Total ....................... 93.9 4,459.2 2,734.1 5,195.5 0.0 0.0 12,482.7

North Carolina - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

North Carolina - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.7 2.9 3.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.7 3.6 2.9 0.0 7.1

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.7 3.6 3.6 2.9 10.7

North Carolina - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.7 2.9 3.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.7 3.6 2.9 0.0 7.1

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.7 3.6 3.6 2.9 10.7

 See notes at end of table.
Table A1. Estimates of the Demonstrated Reserve Base of Coal by Btu/Sulfur Range, State, and Type

of Mining (Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

44 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

North Dakota - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 566.6 975.5 1,788.2 4,470.5 1,114.4 479.9 9,395.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 566.6 975.5 1,788.2 4,470.5 1,114.4 479.9 9,395.0

North Dakota - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

North Dakota - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 566.6 975.5 1,788.2 4,470.5 1,114.4 479.9 9,395.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 566.6 975.5 1,788.2 4,470.5 1,114.4 479.9 9,395.0

Ohio - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 18.1 33.8 92.5 280.5 633.0 1,058.0

23-25.99 .................... 30.5 84.6 134.4 439.0 943.1 2,583.7 4,215.1

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 40.7 82.4 105.9 106.3 266.8 602.0

Total ....................... 30.5 143.4 250.5 637.4 1,329.9 3,483.5 5,875.2

Ohio - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 9.1 10.5 156.0 639.4 1,477.6 2,292.6

23-25.99 .................... 139.5 111.7 288.8 1,021.9 2,556.9 8,221.6 12,340.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 42.0 78.5 285.9 809.2 1,940.1 3,155.7

Total ....................... 139.5 162.8 377.8 1,463.8 4,005.5 11,639.3 17,788.7

Ohio - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 27.2 44.3 248.5 920.0 2,110.7 3,350.7

23-25.99 .................... 170.0 196.3 423.1 1,460.9 3,500.0 10,805.3 16,555.5

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 82.6 160.9 391.9 915.5 2,206.8 3,757.7

Total ....................... 170.0 306.1 628.3 2,101.2 5,335.4 15,122.8 23,663.9

Oklahoma - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 26.4 26.4

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 28.6 4.9 8.9 14.2 88.5 145.1

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 64.6 30.2 38.8 32.9 0.0 166.5

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 93.2 35.1 47.7 47.1 114.9 338.0

Oklahoma - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 64.8 64.8

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 61.2 83.4 75.3 55.7 148.9 424.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 269.7 126.9 234.7 116.6 0.0 747.8

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 330.8 210.3 310.0 172.2 213.7 1,237.1

Oklahoma - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 91.2 91.2

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 89.8 88.3 84.2 69.8 237.4 569.5

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 334.3 157.0 273.5 149.5 0.0 914.3

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 424.0 245.4 357.7 219.3 328.6 1,575.0

 See notes at end of table.
Table A1. Estimates of the Demonstrated Reserve Base of Coal by Btu/Sulfur Range, State, and Type

of Mining (Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

Energy Information Administration/ U.S. Coal Reserves: 1997 Update 45

Oregon - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.8 0.4 0.6 0.0 0.2 0.2 2.3

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.4 0.0 0.2 0.0 0.0 0.0 0.6

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 1.3 0.4 0.8 0.0 0.2 0.2 2.9

Oregon - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 4.2 2.1 3.1 0.0 1.0 1.0 11.4

20-22.99 . . . . . . . . . . . . . . . . . . . . 2.1 0.0 1.0 0.0 0.0 0.0 3.1

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 6.2 2.1 4.2 0.0 1.0 1.0 14.5

Oregon - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 5.0 2.5 3.7 0.0 1.3 1.3 13.7

20-22.99 . . . . . . . . . . . . . . . . . . . . 2.5 0.0 1.3 0.0 0.0 0.0 3.7

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 7.5 2.5 5.0 0.0 1.3 1.3 17.5

Pennsylvania, Anthracite - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 10.9 2.0 3.9 0.0 0.0 16.8

23-25.99 .................... 426.6 1,687.0 430.7 75.1 11.1 4.1 2,634.5

26+ . . . . . . . . . . . . . . . . . . . . . . . . 97.5 493.9 108.2 18.9 0.2 0.0 718.7

Total ....................... 524.1 2,191.8 540.9 97.9 11.3 4.1 3,370.0

Pennsylvania, Anthracite - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 13.2 0.0 3.9 0.0 0.0 17.1

23-25.99 .................... 864.0 1,905.6 251.7 30.5 4.3 0.0 3,056.1

26+ . . . . . . . . . . . . . . . . . . . . . . . . 196.9 415.2 135.1 26.6 2.5 0.0 776.3

Total ....................... 1,061.0 2,334.0 386.9 61.0 6.8 0.0 3,849.5

Pennsylvania, Anthracite - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 24.1 2.0 7.8 0.0 0.0 33.9

23-25.99 .................... 1,290.6 3,592.6 682.4 105.6 15.4 4.1 5,690.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 294.5 909.0 243.3 45.5 2.7 0.0 1,495.0

Total ....................... 1,585.1 4,525.7 927.8 158.9 18.0 4.1 7,219.5

Pennsylvania, Bituminous - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 38.7 17.9 56.6

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 6.5 27.6 147.4 143.4 125.0 449.9

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 24.4 61.2 276.3 132.1 44.0 537.9

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 30.9 88.8 423.7 314.1 186.9 1,044.4

Pennsylvania, Bituminous - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 95.1 244.4 225.0 564.5

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 94.9 239.1 2,129.3 2,836.7 1,658.0 6,957.8

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 387.1 1,136.3 6,472.8 4,187.5 676.2 12,859.9

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 482.0 1,375.4 8,697.1 7,268.5 2,559.1 20,382.2

Pennsylvania, Bituminous - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 95.1 283.1 242.9 621.1

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 101.4 266.6 2,276.7 2,980.0 1,783.0 7,407.7

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 411.5 1,197.5 6,749.1 4,319.5 720.2 13,397.8

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 512.9 1,464.2 9,120.8 7,582.6 2,746.1 21,426.6

 See notes at end of table.
Table A1. Estimates of the Demonstrated Reserve Base of Coal by Btu/Sulfur Range, State, and Type

of Mining (Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

46 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

South Dakota - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 137.0 1.0 228.1 0.0 366.1

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 137.0 1.0 228.1 0.0 366.1

South Dakota - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

South Dakota - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 137.0 1.0 228.1 0.0 366.1

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 137.0 1.0 228.1 0.0 366.1

Tennessee - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 107.1 0.0 0.0 107.1

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 56.4 34.1 28.3 58.3 0.0 177.1

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 56.4 34.1 135.4 58.3 0.0 284.3

Tennessee - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 177.2 0.0 0.0 177.2

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 121.3 68.7 58.7 105.6 0.0 354.3

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 121.3 68.7 235.9 105.6 0.0 531.5

Tennessee - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 284.3 0.0 0.0 284.3

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 177.7 102.8 87.0 164.0 0.0 531.4

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 177.7 102.8 371.3 164.0 0.0 815.7

Texas - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 759.1 7,304.2 4,383.8 483.9 12,931.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 759.1 7,304.2 4,383.8 483.9 12,931.0

Texas - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Texas - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 759.1 7,304.2 4,383.8 483.9 12,931.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 759.1 7,304.2 4,383.8 483.9 12,931.0

 See notes at end of table.
Table A1. Estimates of the Demonstrated Reserve Base of Coal by Btu/Sulfur Range, State, and Type

of Mining (Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

Energy Information Administration/ U.S. Coal Reserves: 1997 Update 47

Utah - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 34.7 21.9 106.8 44.0 42.6 250.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 9.0 4.9 1.8 0.0 0.0 0.0 15.7

26+ . . . . . . . . . . . . . . . . . . . . . . . . 1.3 0.9 0.0 0.0 0.0 0.0 2.2

Total ....................... 10.3 40.5 23.7 106.8 44.0 42.6 267.9

Utah - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.6 0.6 0.0 0.0 0.0 1.1

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 770.5 922.0 1,561.1 379.7 535.0 4,168.3

23-25.99 .................... 606.4 342.5 148.9 0.0 0.0 0.0 1,097.9

26+ . . . . . . . . . . . . . . . . . . . . . . . . 134.8 180.4 0.0 0.0 0.0 0.0 315.2

Total ....................... 741.2 1,294.0 1,071.5 1,561.1 379.7 535.0 5,582.5

Utah - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.6 0.6 0.0 0.0 0.0 1.1

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 805.2 943.9 1,667.9 423.7 577.6 4,418.3

23-25.99 .................... 615.4 347.4 150.7 0.0 0.0 0.0 1,113.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 136.1 181.3 0.0 0.0 0.0 0.0 317.4

Total ....................... 751.5 1,334.5 1,095.2 1,667.9 423.7 577.6 5,850.4

Virginia - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 3.3 12.7 106.3 0.0 0.0 0.0 122.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 61.8 284.3 136.7 68.6 0.0 0.0 551.5

Total ....................... 65.1 297.1 243.0 68.6 0.0 0.0 673.8

Virginia - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 .................... 13.4 9.1 13.3 0.0 0.0 0.0 35.7

23-25.99 .................... 65.1 135.2 121.7 7.6 0.0 0.0 329.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 175.2 581.5 268.4 137.7 0.0 0.0 1,162.8

Total ....................... 253.7 725.8 403.3 145.3 0.0 0.0 1,528.2

Virginia - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 .................... 13.4 9.1 13.3 0.0 0.0 0.0 35.7

23-25.99 .................... 68.4 147.9 228.0 7.6 0.0 0.0 452.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 237.1 865.9 405.1 206.3 0.0 0.0 1,714.3

Total ....................... 318.8 1,022.9 646.3 213.9 0.0 0.0 2,202.0

Washington - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 8.1 0.0 0.0 0.0 8.1

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 49.3 0.0 0.0 49.3

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 8.1 49.3 0.0 0.0 57.4

Washington - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 83.4 169.0 776.1 0.0 0.0 1,028.5

20-22.99 .................... 124.8 0.0 0.0 81.4 0.0 0.0 206.2

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 97.6 0.0 0.0 0.0 0.0 97.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 124.8 181.0 169.0 857.5 0.0 0.0 1,332.3

Washington - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 8.1 0.0 0.0 0.0 8.1

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 83.4 169.0 825.4 0.0 0.0 1,077.8

20-22.99 .................... 124.8 0.0 0.0 81.4 0.0 0.0 206.2

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 97.6 0.0 0.0 0.0 0.0 97.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 124.8 181.0 177.1 906.8 0.0 0.0 1,389.7

 See notes at end of table.
Table A1. Estimates of the Demonstrated Reserve Base of Coal by Btu/Sulfur Range, State, and Type

of Mining (Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

48 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

West Virginia - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 22.2 22.2

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 425.0 380.1 261.3 9.5 71.0 1,146.9

26+ . . . . . . . . . . . . . . . . . . . . . . . . 174.1 1,785.5 490.2 440.0 287.1 82.9 3,259.7

Total ....................... 174.1 2,210.5 870.3 701.2 296.6 176.0 4,428.8

West Virginia - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 186.1 209.3 70.2 465.7

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 771.7 803.4 2,037.1 963.0 3,483.3 8,058.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 988.7 8,492.8 3,190.0 4,407.9 3,160.1 2,204.6 22,444.2

Total ....................... 988.7 9,264.5 3,993.5 6,631.1 4,332.4 5,758.1 30,968.3

West Virginia - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 186.1 209.3 92.4 487.9

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 1,196.7 1,183.6 2,298.3 972.5 3,554.3 9,205.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 1,162.8 10,278.3 3,680.2 4,847.9 3,447.2 2,287.5 25,703.9

Total ....................... 1,162.8 11,475.0 4,863.8 7,332.4 4,629.0 5,934.1 35,397.1

Wyoming - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 1,127.4 210.0 1,646.3 2,983.7

15-19.99 .................... 4,870.9 9,668.9 4,390.9 1,550.3 416.3 927.9 21,825.1

20-22.99 .................... 35.9 161.8 215.7 54.8 21.6 0.0 489.8

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 4,906.7 9,830.8 4,606.6 2,732.6 647.9 2,574.2 25,298.7

Wyoming - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 .................... 3,780.9 15,220.9 9,690.6 8,779.5 1,185.9 0.0 38,657.8

20-22.99 .................... 490.7 501.6 683.2 364.9 0.0 60.7 2,101.2

23-25.99 .................... 82.2 503.7 829.9 341.0 0.0 0.0 1,756.9

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 4,353.8 16,226.3 11,203.7 9,485.4 1,185.9 60.7 42,515.8

Wyoming - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 1,127.4 210.0 1,646.3 2,983.7

15-19.99 .................... 8,651.7 24,889.9 14,081.5 10,329.8 1,602.2 927.9 60,483.0

20-22.99 .................... 526.6 663.4 898.9 419.7 21.6 60.7 2,591.0

23-25.99 .................... 82.2 503.7 829.9 341.0 0.0 0.0 1,756.9

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 9,260.5 26,057.0 15,810.4 12,217.9 1,833.8 2,634.9 67,814.5

United States - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 2,440.9 4,696.1 12,724.5 16,020.2 7,796.6 3,540.2 47,218.4

15-19.99 .................... 25,484.4 15,748.2 11,639.5 5,451.7 648.9 1,402.7 60,375.4

20-22.99 .................... 257.6 1,068.5 839.0 1,850.1 2,399.6 19,229.8 25,644.6

23-25.99 .................... 687.4 3,158.0 2,090.5 2,663.6 3,177.0 7,860.6 19,637.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 617.0 5,115.7 2,321.0 3,036.4 1,263.1 735.7 13,089.0

Total ....................... 29,487.3 29,786.6 29,614.5 29,021.9 15,285.2 32,769.0 165,964.4

United States - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 .................... 41,056.0 36,760.2 24,787.5 15,505.5 1,873.7 758.9 120,741.8

20-22.99 .................... 3,168.1 5,604.4 3,929.5 7,146.4 7,450.0 58,423.6 85,722.0

23-25.99 .................... 4,046.9 6,408.6 3,822.0 8,821.1 11,448.8 54,658.5 89,205.9

26+ . . . . . . . . . . . . . . . . . . . . . . . . 1,800.4 11,778.6 5,609.1 12,676.5 9,122.5 5,118.5 46,105.5

Total ....................... 50,071.4 60,551.8 38,148.1 44,149.5 29,895.0 118,959.5 341,775.2

United States - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 2,440.9 4,696.1 12,724.5 16,020.2 7,796.6 3,540.2 47,218.4

15-19.99 .................... 66,540.4 52,508.4 36,427.0 20,957.2 2,522.6 2,161.6 181,117.1

20-22.99 .................... 3,425.7 6,672.9 4,768.5 8,996.5 9,849.6 77,653.4 111,366.7

23-25.99 .................... 4,734.4 9,566.6 5,912.5 11,484.6 14,625.8 62,519.1 108,842.9

26+ . . . . . . . . . . . . . . . . . . . . . . . . 2,417.4 16,894.3 7,930.1 15,712.8 10,385.7 5,854.3 59,194.5

Total ....................... 79,558.7 90,338.4 67,762.5 73,171.4 45,180.2 151,728.5 507,739.7

 Note: Totals may not equal sum of components because of independent rounding. Heat and sulfur content categories of coal resources and reserves

are rounded to one decimal place. Conversion of heat and sulfur contents to millions of Btu per short ton and pounds of sulfur per million Btu, respectively,

produces values with multiple decimal places. These are rounded to one place within category allocations, as an appropriate expression of accuracy

for estimates extended to in-place coal resources and reserves. 

 Source: EIA Coal Reserves Data Base program, State geological and mineral resource surveys, and other geological reports.
Energy Information Administration/ U.S. Coal Reserves: 1997 Update 49

Table A2. Estimated Recoverable Reserves of Coal by Btu/Sulfur Range, State, and Type of Mining

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

Alabama - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 771.4 0.0 0.0 771.4

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 115.2 169.6 429.1 135.8 0.0 849.7

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 137.9 97.5 463.0 0.0 0.0 698.4

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 253.0 267.1 1,663.5 135.8 0.0 2,319.5

Alabama - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 69.8 99.7 137.5 54.3 0.0 361.3

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 79.8 0.0 209.1 0.0 0.0 289.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 149.6 99.7 346.7 54.3 0.0 650.3

Alabama - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 771.4 0.0 0.0 771.4

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 184.9 269.3 566.7 190.1 0.0 1,211.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 217.7 97.5 672.1 0.0 0.0 987.4

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 402.7 366.8 2,010.2 190.1 0.0 2,969.8

Alaska, South - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 11.1 0.0 0.0 0.0 0.0 0.0 11.1

15-19.99 .................... 372.3 40.9 0.0 0.0 0.0 0.0 413.1

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 383.4 40.9 0.0 0.0 0.0 0.0 424.2

Alaska, South - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 .................... 2,067.1 44.1 0.0 0.0 0.0 0.0 2,111.3

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 8.9 0.0 0.0 0.0 0.0 8.9

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 2,067.1 53.0 0.0 0.0 0.0 0.0 2,120.2

Alaska, South - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 11.1 0.0 0.0 0.0 0.0 0.0 11.1

15-19.99 .................... 2,439.4 85.0 0.0 0.0 0.0 0.0 2,524.4

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 8.9 0.0 0.0 0.0 0.0 8.9

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 2,450.5 93.9 0.0 0.0 0.0 0.0 2,544.4

Alaska, North - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Alaska, North - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Alaska, North - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

 See notes at end of table.
Table A2. Estimated Recoverable Reserves of Coal by Btu/Sulfur Range, State, and Type of Mining

(Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

50 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

Arizona - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 46.9 0.0 0.0 0.0 0.0 46.9

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 46.9 0.0 0.0 0.0 0.0 46.9

Arizona - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 51.4 0.0 0.0 0.0 0.0 51.4

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 51.4 0.0 0.0 0.0 0.0 51.4

Arizona - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 98.4 0.0 0.0 0.0 0.0 98.4

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 98.4 0.0 0.0 0.0 0.0 98.4

Arkansas - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 17.7 0.0 0.0 17.7

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.4 0.4

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 1.5 72.9 6.5 1.1 1.1 83.1

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 1.5 72.9 24.2 1.1 1.4 101.1

Arkansas - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.9 0.9

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 6.6 89.8 20.3 4.7 4.7 126.1

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 6.6 89.8 20.3 4.7 5.6 127.0

Arkansas - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 17.7 0.0 0.0 17.7

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 1.2 1.2

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 8.1 162.7 26.8 5.8 5.8 209.2

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 8.1 162.7 44.4 5.8 7.0 228.1

Colorado - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 3,296.4 0.0 0.0 0.0 3,296.4

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 .................... 113.4 0.0 8.2 9.8 0.0 0.0 131.3

23-25.99 .................... 150.7 112.9 19.8 30.8 13.8 0.0 328.1

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 2.9 0.0 0.0 0.0 0.0 2.9

Total ....................... 264.1 115.7 3,324.5 40.6 13.8 0.0 3,758.7

Colorado - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 .................... 1,399.2 576.8 33.8 0.0 0.0 0.0 2,009.8

20-22.99 .................... 744.5 821.0 125.6 79.6 0.0 0.0 1,770.7

23-25.99 .................... 1,133.1 637.1 163.3 160.7 81.4 0.0 2,175.5

26+ . . . . . . . . . . . . . . . . . . . . . . . . 105.5 147.7 34.2 42.8 0.0 0.0 330.2

Total ....................... 3,382.3 2,182.6 356.8 283.2 81.4 0.0 6,286.2

Colorado - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 3,296.4 0.0 0.0 0.0 3,296.4

15-19.99 .................... 1,399.2 576.8 33.8 0.0 0.0 0.0 2,009.8

20-22.99 .................... 857.9 821.0 133.8 89.4 0.0 0.0 1,902.0

23-25.99 .................... 1,283.8 750.0 183.1 191.6 95.2 0.0 2,503.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 105.5 150.6 34.2 42.8 0.0 0.0 333.1

Total ....................... 3,646.3 2,298.3 3,681.3 323.8 95.2 0.0 10,044.9

 See notes at end of table.
Table A2. Estimated Recoverable Reserves of Coal by Btu/Sulfur Range, State, and Type of Mining

(Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

Energy Information Administration/ U.S. Coal Reserves: 1997 Update 51

Georgia - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.1 0.0 0.0 0.2

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.2 0.4 0.3 0.0 0.1 0.1 1.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.2 0.4 0.3 0.1 0.1 0.1 1.2

Georgia - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.1 0.0 0.1 0.0 0.0 0.1

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.3 0.1 0.1 0.0 0.1 0.1 0.8

Total . . . . . . . . . . . . . . . . . . . . . . . 0.3 0.2 0.1 0.1 0.1 0.1 0.8

Georgia - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.1 0.0 0.2 0.0 0.0 0.3

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.6 0.5 0.4 0.0 0.2 0.2 1.8

Total . . . . . . . . . . . . . . . . . . . . . . . 0.6 0.6 0.4 0.2 0.2 0.2 2.0

Idaho - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Idaho - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.1 0.9 0.5 0.5 0.0 0.0 2.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.1 0.9 0.5 0.5 0.0 0.0 2.0

Idaho - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.1 0.9 0.5 0.5 0.0 0.0 2.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.1 0.9 0.5 0.5 0.0 0.0 2.0

Illinois - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 5.2 71.2 76.4

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 2.5 197.8 303.0 8,581.8 9,085.1

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.7 5.0 30.8 908.4 944.9

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 3.2 202.8 339.0 9,561.3 10,106.4

Illinois - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 .................... 45.6 179.3 325.4 802.7 696.5 15,172.8 17,222.2

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.5 8.3 78.8 534.4 552.0 9,701.3 10,875.2

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 1.9 1.9

Total ....................... 46.1 187.5 404.1 1,337.1 1,248.5 24,875.9 28,099.3

Illinois - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 5.2 71.2 76.4

20-22.99 .................... 45.6 179.3 327.8 1,000.5 999.6 23,754.6 26,307.3

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.5 8.3 79.5 539.4 582.8 10,609.7 11,820.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 1.9 1.9

Total ....................... 46.1 187.5 407.3 1,539.9 1,587.5 34,437.3 38,205.6

 See notes at end of table.
Table A2. Estimated Recoverable Reserves of Coal by Btu/Sulfur Range, State, and Type of Mining

(Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

52 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

Indiana - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 39.5 20.3 84.5 0.0 153.5 297.8

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 20.5 5.4 16.9 141.0 136.3 320.1

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 60.0 25.7 101.4 141.0 289.8 617.9

Indiana - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 139.0 109.0 308.4 527.1 974.6 2,058.1

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 108.8 48.3 257.4 447.4 749.5 1,611.3

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 247.8 157.3 565.8 974.5 1,724.1 3,669.4

Indiana - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 178.5 129.3 392.9 527.1 1,128.1 2,355.8

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 129.2 53.7 274.4 588.4 885.8 1,931.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 307.7 183.0 667.2 1,115.5 2,013.9 4,287.3

Iowa - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 319.9 0.0 319.9

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 319.9 0.0 319.9

Iowa - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 87.3 720.0 807.2

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 87.3 720.0 807.2

Iowa - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 407.2 720.0 1,127.1

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 407.2 720.0 1,127.1

Kansas - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 53.1 302.9 356.1

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 172.4 106.2 278.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 47.9 47.9

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 225.5 457.1 682.5

Kansas - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Kansas - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 53.1 302.9 356.1

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 172.4 106.2 278.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 47.9 47.9

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 225.5 457.1 682.5

 See notes at end of table.
Table A2. Estimated Recoverable Reserves of Coal by Btu/Sulfur Range, State, and Type of Mining

(Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

Energy Information Administration/ U.S. Coal Reserves: 1997 Update 53

Kentucky, Eastern - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 11.0 27.6 88.2 22.1 77.2 226.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 110.2 66.1 110.2 115.7 115.7 518.1

23-25.99 . . . . . . . . . . . . . . . . . . . . 5.5 308.7 407.9 424.4 209.4 198.4 1,554.3

26+ . . . . . . . . . . . . . . . . . . . . . . . . 132.3 1,207.1 628.3 771.6 330.7 126.8 3,196.8

Total ....................... 137.8 1,637.0 1,129.9 1,394.4 677.9 518.1 5,495.1

Kentucky, Eastern - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 2.5 6.3 20.1 5.0 17.6 51.6

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 25.2 15.1 25.2 26.4 26.4 118.3

23-25.99 . . . . . . . . . . . . . . . . . . . . 1.3 70.5 93.1 96.9 47.8 45.3 354.9

26+ . . . . . . . . . . . . . . . . . . . . . . . . 30.2 275.6 143.5 176.2 75.5 29.0 730.0

Total ....................... 31.5 373.8 258.0 318.4 154.8 118.3 1,254.8

Kentucky, Eastern - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 13.5 33.9 108.3 27.1 94.8 277.6

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 135.4 81.3 135.4 142.2 142.2 636.4

23-25.99 . . . . . . . . . . . . . . . . . . . . 6.8 379.1 501.0 521.3 257.3 243.7 1,909.2

26+ . . . . . . . . . . . . . . . . . . . . . . . . 162.5 1,482.7 771.8 947.8 406.2 155.7 3,926.7

Total ....................... 169.3 2,010.8 1,387.9 1,712.9 832.7 636.4 6,749.9

Kentucky, Western - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 36.9 435.3 416.9 889.1

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 87.0 465.5 846.9 1,399.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 18.4 3.2 21.6

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 123.9 919.2 1,267.0 2,310.0

Kentucky, Western - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 5.9 799.8 1,129.7 1,935.3

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 25.5 786.1 3,879.5 4,691.1

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 200.8 89.6 290.3

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 31.3 1,786.7 5,098.8 6,916.7

Kentucky, Western - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 42.7 1,235.1 1,546.5 2,824.4

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 112.5 1,251.6 4,726.5 6,090.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 219.2 92.7 311.9

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 155.2 2,705.9 6,365.7 9,226.7

Louisiana - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 342.9 0.0 0.0 342.9

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 342.9 0.0 0.0 342.9

Louisiana - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Louisiana - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 342.9 0.0 0.0 342.9

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 342.9 0.0 0.0 342.9

 See notes at end of table.
Table A2. Estimated Recoverable Reserves of Coal by Btu/Sulfur Range, State, and Type of Mining

(Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

54 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

Maryland - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 15.9 0.0 15.9

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 2.6 7.8 12.5 15.5 0.0 38.5

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 2.6 7.8 12.5 31.4 0.0 54.4

Maryland - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 106.3 0.0 106.3

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 27.9 48.6 103.1 63.1 0.0 242.7

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 27.9 48.6 103.1 169.4 0.0 349.0

Maryland - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 122.2 0.0 122.2

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 30.5 56.4 115.7 78.6 0.0 281.2

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 30.5 56.4 115.7 200.8 0.0 403.4

Michigan - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.1 0.0 0.1

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.1 0.4 0.1 0.1 0.6

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.3 1.3 0.3 0.2 2.2

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.2 0.1 0.0 0.2

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.5 1.9 0.5 0.3 3.1

Michigan - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.3 0.0 0.3

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 3.0 4.6 3.1 2.9 13.6

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 4.8 14.5 9.8 7.8 36.8

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 2.2 2.5 0.0 4.7

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 7.8 21.2 15.7 10.7 55.4

Michigan - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.4 0.0 0.4

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 3.1 5.0 3.1 3.0 14.2

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 5.1 15.8 10.1 8.0 39.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 2.3 2.6 0.0 4.9

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 8.2 23.1 16.2 11.0 58.5

Missouri - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 54.5 1,976.0 2,030.5

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 95.7 1,006.5 1,102.2

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 28.0 28.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 150.2 3,010.6 3,160.7

Missouri - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 2.9 550.7 553.6

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 16.7 111.7 128.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 7.2 7.2

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 19.6 669.6 689.2

Missouri - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 57.4 2,526.7 2,584.1

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 112.4 1,118.2 1,230.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 35.2 35.2

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 169.8 3,680.2 3,849.9

 See notes at end of table.
Table A2. Estimated Recoverable Reserves of Coal by Btu/Sulfur Range, State, and Type of Mining

(Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

Energy Information Administration/ U.S. Coal Reserves: 1997 Update 55

Montana - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 1,458.1 2,916.2 4,579.2 1,211.9 1,458.1 729.1 12,352.6

15-19.99 .................... 16,507.8 4,066.4 4,905.1 1,228.3 151.0 175.9 27,034.4

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 17,965.9 6,982.6 9,484.3 2,440.2 1,609.1 905.0 39,387.0

Montana - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 .................... 15,386.1 9,619.2 7,241.4 2,264.3 342.7 367.7 35,221.3

20-22.99 .................... 177.0 214.1 35.7 106.8 69.8 98.0 701.4

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 15,563.1 9,833.3 7,277.0 2,371.2 412.5 465.7 35,922.7

Montana - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 1,458.1 2,916.2 4,579.2 1,211.9 1,458.1 729.1 12,352.6

15-19.99 .................... 31,893.8 13,685.6 12,146.4 3,492.6 493.7 543.6 62,255.7

20-22.99 .................... 177.0 214.1 35.7 106.8 69.8 98.0 701.4

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 33,528.9 16,815.9 16,761.3 4,811.3 2,021.5 1,370.7 75,309.7

New Mexico - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 710.7 826.1 1,492.2 0.0 0.0 3,029.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 326.2 270.2 601.5 0.0 0.0 1,198.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 7.9 0.0 5.0 0.0 0.0 12.9

26+ . . . . . . . . . . . . . . . . . . . . . . . . 35.7 0.0 0.0 0.0 0.0 0.0 35.7

Total ....................... 35.7 1,044.9 1,096.3 2,098.7 0.0 0.0 4,275.6

New Mexico - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 551.5 232.4 640.4 0.0 0.0 1,424.3

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 399.6 271.9 294.4 0.0 0.0 965.9

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 286.2 0.2 14.3 0.0 0.0 300.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 24.7 146.8 0.4 0.0 0.0 0.0 171.9

Total ....................... 24.7 1,384.0 504.9 949.2 0.0 0.0 2,862.8

New Mexico - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 1,262.2 1,058.5 2,132.6 0.0 0.0 4,453.3

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 725.8 542.1 895.9 0.0 0.0 2,163.9

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 294.1 0.2 19.3 0.0 0.0 313.5

26+ . . . . . . . . . . . . . . . . . . . . . . . . 60.4 146.8 0.4 0.0 0.0 0.0 207.6

Total ....................... 60.4 2,428.9 1,601.2 3,047.9 0.0 0.0 7,138.4

North Carolina - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

North Carolina - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.3 1.3 1.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.3 1.6 1.3 0.0 3.2

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.3 1.6 1.6 1.3 4.8

North Carolina - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.3 1.3 1.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.3 1.6 1.3 0.0 3.2

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.3 1.6 1.6 1.3 4.8

 See notes at end of table.
Table A2. Estimated Recoverable Reserves of Coal by Btu/Sulfur Range, State, and Type of Mining

(Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

56 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

North Dakota - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 432.3 744.2 1,364.1 3,410.4 850.1 366.1 7,167.2

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 432.3 744.2 1,364.1 3,410.4 850.1 366.1 7,167.2

North Dakota - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

North Dakota - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 432.3 744.2 1,364.1 3,410.4 850.1 366.1 7,167.2

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 432.3 744.2 1,364.1 3,410.4 850.1 366.1 7,167.2

Ohio - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 12.7 22.6 61.1 179.1 418.1 693.6

23-25.99 .................... 20.0 56.0 88.3 282.2 609.5 1,700.5 2,756.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 27.2 55.9 70.0 69.8 172.9 395.8

Total ....................... 20.0 95.8 166.8 413.4 858.4 2,291.4 3,845.7

Ohio - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 4.0 4.8 68.2 281.3 649.9 1,008.3

23-25.99 .................... 61.4 49.9 127.4 437.3 1,127.3 3,628.2 5,431.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 18.5 34.9 126.0 358.5 848.5 1,386.5

Total ....................... 61.4 72.5 167.0 631.5 1,767.2 5,126.7 7,826.2

Ohio - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 16.7 27.4 129.3 460.4 1,068.0 1,701.8

23-25.99 .................... 81.3 105.9 215.6 719.5 1,736.8 5,328.7 8,187.8

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 45.7 90.8 196.1 428.3 1,021.4 1,782.2

Total ....................... 81.3 168.3 333.8 1,044.9 2,625.6 7,418.1 11,671.9

Oklahoma - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 18.5 18.5

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 20.0 3.4 6.2 9.9 62.0 101.5

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 45.2 21.1 27.2 23.1 0.0 116.6

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 65.3 24.5 33.4 33.0 80.4 236.6

Oklahoma - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 30.2 30.2

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 28.5 38.9 35.1 25.9 69.4 197.7

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 125.6 59.1 109.3 54.3 0.0 348.4

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 154.1 98.0 144.4 80.3 99.6 576.4

Oklahoma - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 48.7 48.7

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 48.5 42.3 41.3 35.8 131.3 299.3

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 170.9 80.2 136.5 77.4 0.0 465.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 219.4 122.5 177.8 113.2 180.0 813.0

 See notes at end of table.
Table A2. Estimated Recoverable Reserves of Coal by Btu/Sulfur Range, State, and Type of Mining

(Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

Energy Information Administration/ U.S. Coal Reserves: 1997 Update 57

Oregon - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.6 0.3 0.5 0.0 0.2 0.2 1.7

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.3 0.0 0.2 0.0 0.0 0.0 0.5

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.9 0.3 0.6 0.0 0.2 0.2 2.1

Oregon - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 1.9 0.9 1.4 0.0 0.5 0.5 5.1

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.9 0.0 0.5 0.0 0.0 0.0 1.4

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 2.8 0.9 1.9 0.0 0.5 0.5 6.5

Oregon - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 2.5 1.2 1.9 0.0 0.6 0.6 6.8

20-22.99 . . . . . . . . . . . . . . . . . . . . 1.2 0.0 0.6 0.0 0.0 0.0 1.9

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 3.7 1.2 2.5 0.0 0.6 0.6 8.7

Pennsylvania, Anthracite - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 1.8 0.2 0.6 0.0 0.0 2.6

23-25.99 .................... 70.0 203.9 48.8 8.8 1.1 0.4 333.1

26+ . . . . . . . . . . . . . . . . . . . . . . . . 15.3 56.3 12.3 2.0 0.0 0.0 86.0

Total ....................... 85.3 262.1 61.4 11.4 1.2 0.4 421.7

Pennsylvania, Anthracite - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 1.3 0.0 0.4 0.0 0.0 1.7

23-25.99 .................... 77.9 165.5 22.6 3.1 0.4 0.0 269.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 16.9 38.2 11.9 2.3 0.2 0.0 69.5

Total ....................... 94.9 205.0 34.5 5.7 0.6 0.0 340.7

Pennsylvania, Anthracite - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 3.2 0.2 1.0 0.0 0.0 4.3

23-25.99 .................... 148.0 369.4 71.5 11.8 1.5 0.4 602.5

26+ . . . . . . . . . . . . . . . . . . . . . . . . 32.2 94.5 24.2 4.3 0.2 0.0 155.5

Total ....................... 180.2 467.0 95.9 17.1 1.8 0.4 762.4

Pennsylvania, Bituminous - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 27.0 12.5 39.4

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 4.6 19.2 102.7 99.9 87.1 313.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 17.0 42.6 192.5 92.0 30.7 374.8

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 21.5 61.9 295.2 218.8 130.2 727.6

Pennsylvania, Bituminous - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 50.9 130.8 120.4 302.1

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 50.8 127.9 1,139.5 1,518.0 887.3 3,723.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 207.2 608.1 3,463.8 2,240.9 361.9 6,881.8

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 258.0 736.0 4,654.2 3,889.7 1,369.5 10,907.3

Pennsylvania, Bituminous - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 50.9 157.8 132.9 341.5

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 55.3 147.1 1,242.2 1,617.9 974.3 4,036.8

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 224.2 650.7 3,656.3 2,332.9 392.5 7,256.6

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 279.5 797.9 4,949.4 4,108.5 1,499.7 11,634.9

 See notes at end of table.
Table A2. Estimated Recoverable Reserves of Coal by Btu/Sulfur Range, State, and Type of Mining

(Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

58 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

South Dakota - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 103.6 0.8 172.4 0.0 276.8

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 103.6 0.8 172.4 0.0 276.8

South Dakota - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

South Dakota - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 103.6 0.8 172.4 0.0 276.8

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 103.6 0.8 172.4 0.0 276.8

Tennessee - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 72.6 0.0 0.0 72.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 38.2 23.1 19.2 39.5 0.0 120.1

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 38.2 23.1 91.8 39.5 0.0 192.6

Tennessee - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 97.1 0.0 0.0 97.1

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 66.5 37.6 32.2 57.9 0.0 194.2

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 66.5 37.6 129.3 57.9 0.0 291.3

Tennessee - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 169.7 0.0 0.0 169.7

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 104.7 60.7 51.4 97.4 0.0 314.2

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 104.7 60.7 221.1 97.4 0.0 483.9

Texas - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 584.3 5,622.6 3,374.5 372.5 9,953.9

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 584.3 5,622.6 3,374.5 372.5 9,953.9

Texas - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Texas - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 584.3 5,622.6 3,374.5 372.5 9,953.9

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 584.3 5,622.6 3,374.5 372.5 9,953.9

 See notes at end of table.
Table A2. Estimated Recoverable Reserves of Coal by Btu/Sulfur Range, State, and Type of Mining

(Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

Energy Information Administration/ U.S. Coal Reserves: 1997 Update 59

Utah - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 27.5 17.3 84.6 34.8 33.7 197.9

23-25.99 . . . . . . . . . . . . . . . . . . . . 7.1 3.9 1.4 0.0 0.0 0.0 12.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 1.0 0.7 0.0 0.0 0.0 0.0 1.7

Total . . . . . . . . . . . . . . . . . . . . . . . 8.2 32.1 18.8 84.6 34.8 33.7 212.1

Utah - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.3 0.3 0.0 0.0 0.0 0.5

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 377.7 452.0 765.3 186.1 262.3 2,043.4

23-25.99 .................... 297.3 167.9 73.0 0.0 0.0 0.0 538.2

26+ . . . . . . . . . . . . . . . . . . . . . . . . 66.1 88.4 0.0 0.0 0.0 0.0 154.5

Total ....................... 363.4 634.4 525.3 765.3 186.1 262.3 2,736.7

Utah - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.3 0.3 0.0 0.0 0.0 0.5

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 405.2 469.3 849.8 221.0 296.0 2,241.4

23-25.99 .................... 304.4 171.8 74.4 0.0 0.0 0.0 550.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 67.1 89.2 0.0 0.0 0.0 0.0 156.3

Total ....................... 371.5 666.4 544.0 849.8 221.0 296.0 2,948.8

Virginia - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 2.1 8.2 68.1 0.0 0.0 0.0 78.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 39.6 182.1 87.5 44.0 0.0 0.0 353.2

Total ....................... 41.7 190.3 155.7 44.0 0.0 0.0 431.6

Virginia - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 7.5 5.1 7.4 0.0 0.0 0.0 20.1

23-25.99 .................... 36.6 75.9 68.3 4.3 0.0 0.0 185.1

26+ . . . . . . . . . . . . . . . . . . . . . . . . 98.4 326.5 150.7 77.3 0.0 0.0 652.9

Total ....................... 142.5 407.6 226.5 81.6 0.0 0.0 858.1

Virginia - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 7.5 5.1 7.4 0.0 0.0 0.0 20.1

23-25.99 .................... 38.7 84.1 136.4 4.3 0.0 0.0 263.5

26+ . . . . . . . . . . . . . . . . . . . . . . . . 138.0 508.7 238.2 121.3 0.0 0.0 1,006.2

Total ....................... 184.2 597.9 382.1 125.6 0.0 0.0 1,289.7

Washington - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 6.4 0.0 0.0 0.0 6.4

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 39.1 0.0 0.0 39.1

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 6.4 39.1 0.0 0.0 45.4

Washington - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 42.2 85.6 392.9 0.0 0.0 520.7

20-22.99 .................... 63.2 0.0 0.0 41.2 0.0 0.0 104.4

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 49.4 0.0 0.0 0.0 0.0 49.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 63.2 91.6 85.6 434.1 0.0 0.0 674.5

Washington - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 6.4 0.0 0.0 0.0 6.4

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 42.2 85.6 431.9 0.0 0.0 559.7

20-22.99 .................... 63.2 0.0 0.0 41.2 0.0 0.0 104.4

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 49.4 0.0 0.0 0.0 0.0 49.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 63.2 91.6 91.9 473.2 0.0 0.0 719.9

 See notes at end of table.
Table A2. Estimated Recoverable Reserves of Coal by Btu/Sulfur Range, State, and Type of Mining

(Continued)

(Million Short Tons Remaining as of January 1, 1997)

State and Type of Mining

Sulfur Content

(Pounds of Sulfur per Million Btu)

Total

Heat Content

(Million Btu per Short Ton)  0.40 0.41-0.60 0.61-0.83 0.84-1.67 1.68-2.50 > 2.50

60 Energy Information Administration/ U.S. Coal Reserves: 1997 Update

West Virginia - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 14.4 14.4

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 271.9 238.4 160.8 6.2 42.4 719.6

26+ . . . . . . . . . . . . . . . . . . . . . . . . 111.7 1,142.0 311.8 274.8 171.0 49.1 2,060.2

Total ....................... 111.7 1,413.9 550.2 435.5 177.2 105.8 2,794.2

West Virginia - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 99.4 111.7 37.5 248.6

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 411.8 428.8 1,087.2 514.0 1,859.0 4,300.8

26+ . . . . . . . . . . . . . . . . . . . . . . . . 527.7 4,532.6 1,702.5 2,352.5 1,686.5 1,176.6 11,978.5

Total ....................... 527.7 4,944.5 2,131.3 3,539.0 2,312.2 3,073.1 16,527.8

West Virginia - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

20-22.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 99.4 111.7 51.8 262.9

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 683.7 667.2 1,248.0 520.1 1,901.4 5,020.4

26+ . . . . . . . . . . . . . . . . . . . . . . . . 639.3 5,674.6 2,014.3 2,627.3 1,857.5 1,225.7 14,038.7

Total ....................... 639.3 6,358.3 2,681.5 3,974.6 2,489.4 3,178.9 19,322.0

Wyoming - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 909.8 170.1 1,393.4 2,473.3

15-19.99 .................... 4,274.3 8,433.0 3,843.1 1,320.4 329.9 790.2 18,990.9

20-22.99 .................... 28.4 129.6 172.1 43.4 17.1 0.0 390.7

23-25.99 . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 4,302.7 8,562.6 4,015.1 2,273.7 517.1 2,183.6 21,854.9

Wyoming - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 .................... 2,041.7 8,219.3 5,232.9 4,740.9 640.4 0.0 20,875.2

20-22.99 .................... 265.0 270.9 368.9 197.0 0.0 32.8 1,134.6

23-25.99 .................... 44.4 272.0 448.2 184.2 0.0 0.0 948.7

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 2,351.0 8,762.2 6,050.0 5,122.1 640.4 32.8 22,958.5

Wyoming - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 909.8 170.1 1,393.4 2,473.3

15-19.99 .................... 6,316.0 16,652.3 9,076.0 6,061.4 970.3 790.2 39,866.1

20-22.99 .................... 293.4 400.5 541.0 240.5 17.1 32.8 1,525.3

23-25.99 .................... 44.4 272.0 448.2 184.2 0.0 0.0 948.7

26+ . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Total ....................... 6,653.8 17,324.8 10,065.1 7,395.8 1,157.5 2,216.4 44,813.4

United States - Surface

<15 . . . . . . . . . . . . . . . . . . . . . . . . 1,901.4 3,660.4 9,934.1 12,287.5 6,025.3 2,861.0 36,669.7

15-19.99 .................... 21,155.0 13,262.3 9,602.2 4,168.1 508.4 1,114.6 49,810.6

20-22.99 .................... 142.1 694.5 579.9 1,230.7 1,539.7 12,044.4 16,231.3

23-25.99 .................... 255.4 1,133.5 1,071.4 1,633.0 2,007.2 5,095.2 11,195.7

26+ . . . . . . . . . . . . . . . . . . . . . . . . 335.8 2,861.1 1,361.3 1,883.4 761.3 459.5 7,662.3

Total ....................... 23,789.7 21,611.8 22,548.9 21,202.6 10,841.8 21,574.8 121,569.7

United States - Underground

<15 . . . . . . . . . . . . . . . . . . . . . . . . 0.0 0.0 0.0 0.0 0.0 0.0 0.0

15-19.99 .................... 20,895.9 19,056.9 12,834.0 8,058.7 988.9 385.8 62,220.1

20-22.99 .................... 1,303.7 2,497.5 1,719.2 2,850.0 2,922.8 19,809.0 31,102.1

23-25.99 .................... 1,652.5 2,453.3 1,823.5 4,229.3 5,287.6 20,940.2 36,386.5

26+ . . . . . . . . . . . . . . . . . . . . . . . . 869.9 6,088.1 2,921.7 6,718.9 4,746.4 2,519.4 23,864.2

Total ....................... 24,722.0 30,095.7 19,298.4 21,856.8 13,945.7 43,654.4 153,572.9

United States - Total

<15 . . . . . . . . . . . . . . . . . . . . . . . . 1,901.4 3,660.4 9,934.1 12,287.5 6,025.3 2,861.0 36,669.7

15-19.99 .................... 42,050.9 32,319.2 22,436.2 12,226.8 1,497.3 1,500.4 112,030.8

20-22.99 .................... 1,445.8 3,192.0 2,299.1 4,080.7 4,462.5 31,853.4 47,333.4

23-25.99 .................... 1,908.0 3,586.8 2,895.0 5,862.3 7,294.8 26,035.4 47,582.2

26+ . . . . . . . . . . . . . . . . . . . . . . . . 1,205.6 8,949.2 4,283.0 8,602.2 5,507.6 2,978.9 31,526.6

Total ....................... 48,511.7 51,707.5 41,847.3 43,059.5 24,787.5 65,229.2 275,142.6

 Note: Totals may not equal sum of components because of independent rounding. Heat and sulfur content categories of coal resources and reserves

are rounded to one decimal place. Conversion of heat and sulfur contents to millions of Btu per short ton and pounds of sulfur per million Btu, respectively,

produces values with multiple decimal places. These are rounded to one place within category allocations, as an appropriate expression of accuracy

for estimates extended to in-place coal resources and reserves. 

 Source: EIA Coal Reserves Data Base program, State geological and mineral resource surveys, and other geological reports.