Illinois State Geological Survey 2002 vector digital data ISGS GIS Database colch_tk Champaign, Illinois Illinois State Geological Survey GISDB_COAL_IL_Colchester_Thickness_Py withheld Thickness contours of 28", 42", and 66" were mapped for the Colchester (No. 2) Coal in Illinois. This datafile was created from public data only. The term "insufficient data" is used in the delineation of areas where the coal is known to be thin (less than 18 inches thick) or absent, or areas where there is insufficient thickness data for resource calculation and mapping. This map was created as part of the National Coal Resource Assessment being conducted by the USGS. Updates were made to 7 counties as part of a Coal Availability Assessment, 2002. These data are appropriate for use in local and regional thematic analysis. The data are not appropriate as a geodetic, legal or engineering base. The data set was originally created for the purpose of producing maps of well locations in Illinois for geologic research by the ISGS and others. It serves as an important base cartographic element for many types of maps and has been widely distributed and used outside the ISGS. The data set was not and is not intended as a substitute for surveyed locations, such as can be determined by a registered Public Land Surveyor. Although useful in a GIS as a reference base layer for maps, the data set has no legal basis in the definition of boundaries or property lines. en 2001 publication date of sources Complete Irregular -91.216208 -87.495214 41.522633 37.591290 -91.216208 -87.495214 37.591290 41.522633 none geology coal coal thickness Colchester none Illinois none Reproduction or redistribution of copyrighted digital data sets or products derived therefrom outside of licensee's organization or entity is expressly forbidden. The only exception is redistribution to consultants working for the licensee, and then only for purposes related to work for the licensee. Such consultants may not further reproduce or redistribute these data sets. None of these data shall be electronically duplicated on magnetic or optical media for use by others, in whole or in part, without permission of DNR. Any hardcopies utilizing DNR data sets shall clearly indicate their source. If the licensee has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. Licensee specifically agrees not to misrepresent DNR data sets, nor to imply that changes they made were approved by DNR. These data are not to be used for commercial profit. Christopher P. Korose Illinois State Geological Survey - Coal Section mailing and physical address

615 East Peabody Drive

Champaign Illinois 61820 U.S.A. 217-333-7256 217-333-2830 korose@isgs.uiuc.edu 8:00 a.m. - 5:00 p.m., Monday-Friday Contact this individual ONLY for specific information about the use of this data set. For general questions about distribution, or availability of other data, please contact the Information Office as listed under the Distribution_Information section. ESRI ArcCatalog 8.3.0.800 Shapefile Colchester Coal thickness isopachs were updated for Bureau, Fulton, Henry, Knox, Morgan, Peoria, and Stark counties in 2002. The updated resource coverages were used for these counties. The thickness values for the remaining counties were extracted from previous resource coverages. Any discrepancies were compared to the original source paper map or mylar separate. Isopachs are based on public data available to the ISGS at the time of the original map compilation. Accuracy of this compilation is dependent on the locational and measurement accuracy of the original data points, the distribution of data points, the local variability of the coal seam and other factors. Polygon and chain-node topology is present. The coverage was checked for complete chain-node topology (no dangling arcs, except where appropriate), polygon labels (one per polygon, except for universal polygon), correct regions topology, boundary values appropriate for map projection and map units, and appropriate "fuzzy" tolerances. There are no known arc, polygon or region attribute values outside the appropriate value domains. In areas of limited data, boundaries have been generalized using section lines and/or county boundaries. This is a generalized depiction of regional ground condition. Horizontal positional accuracy was verified by manual overlay of source and hard-copy plots. Arcs within line-width of source maps are deemed acceptable. For positional accuracy of source maps, contact the ISGS Coal Section. Illinois State Geological Survey, Coal Section 1997 report Open File Series 1997-4 Champaign, Illinois Illinois State Geological Survey 62500 digital data set 1996 publication date none thickness isopachs for 28 counties in southeastern Illinois Illinois State Geological Survey, Coal Section 2002 report Illinois Minerals 127 Champaign, Illinois Illinois State Geological Survey 62500 digital data set 2001 publication date none thickness isopachs for 7 counties in northern and western Illinois Illinois State Geological Survey, Coal Section 1996 map ISGS GIS Database /gisdb/illinois/minres/coal2-84 Champaign, Illinois Illinois State Geological Survey 500000 digital data set 1996 publication date none attribute information Illinois State Geological Survey, Coal Section 1996 map ISGS GIS Database /gisdb/illinois/minres/coalmix-84 Champaign, Illinois Illinois State Geological Survey 500000 digital data set 1996 publication date none attribute information Treworgy, J.D. and M.H. Bargh 1984 map ISGS Map same as title Champaign, Illinois Illinois State Geological Survey 500000 paper 1984 publication date none attribute information Treworgy, J.D. and M.H. Bargh 1984 map ISGS Map same as title Champaign, Illinois Illinois State Geological Survey 500000 paper 1984 publication date none coal seam boundary lines for Williamson, Saline, and Gallatin Counties. Hunter, K. n/a map 500000 mylar 1984 approximate printing date none coal seam boundary lines Searight, T.K. and W.H. Smith 1969 report Circular 439 Champaign, Illinois Illinois State Geological Survey 22 pages, 2 plates, 3 figures, 1 table 1 inch = 2.2 miles (approx.) paper 1969 publication date none not available Illinois State Geological Survey 1984 1.0 map ISGS GIS Database /gisdb/illinois/illimap/townships Champaign, Illinois Illinois State Geological Survey 24000 and 62500 digital data set 1984 publication date none townships lines where used as coal seam boundary Illinois State Geological Survey 1984 1.0 map ISGS GIS Database /gisdb/illinois/illimap/counties Champaign, Illinois Illinois State Geological Survey 24000 and 62500 digital data set 1984 publication date none county boundaries where used as coal seam boundary Reinertsen, D.L. 1964 report Circular 374 Champaign, Illinois Illinois State Geological Survey 32 pages, 1 plates, 7 figures, 5 tables 1 inch = 2 miles (approx.) paper 1964 publication date none not available Cady, G.H., and others 1952 report ISGS Bulletin 78 Champaign, Illinois Illinois State Geological Survey 138 pages, 8 plates, 37 figures, 1 table Plate 7 available separately out of print 500000 paper 1952 publication date none not available Jacobson, R.J. 1985 report ISGS Circular 536 Champaign, Illinois Illinois State Geological Survey 58 pages, 6 plates including cross-section, 31 figures, 10 tables 125000 paper 1985 publication date none not available Smith, W. H. 1961 report Circular 311 Champaign, Illinois Illinois State Geological Survey 40 pages, 4 plates, 2 figures, 4 tables Plates 1, 2, and 3 available separately 1 inch = 2 miles (approx.) paper 1961 publication date none not available Smith, W.H. 1968 report Circular 419 Champaign, Il Illinois St. Geological Survey 29 pages, 2 plates, 6 figures, 6 tables Plate 1 available separately 1 inch = 2 miles (approx.) paper 1968 publication date none not available Smith, W.H. and D.J. Berggren 1963 report Circular 348 Champaign, Illinois Illinois St. Geological Survey 59 pages, 4 plates, 7 figures, 8 tables Plates 1, 2 and 3 available separately 1 inch = 2 miles (approx.) paper 1963 publication date none not available Treworgy, C.G. and M.H. Bargh 1982 report Circular 527 Champaign, Illinois Illinois State Geological Survey 65 pages, 2 plates, 25 figures, 5 tables 1 inch = 24 miles (approx.) paper 1982 publication date none not available Existing Coal Section resource coverages for each appropriate county contain detailed information on thickness, depth, and tonnage. The purpose of this project was to extract only the thickness isopachs for the seam and subsequently show only the 28", 42", and 66" thickness polygons. The extracted isopachs were compared to existing drill hole data for accuracy and confidentiality. Isopachs created from confidential data were not used. The resultant polygon coverage was created as follows, using similar steps from the processing of the Springfield Coal thickness coverages as an example: Step 1 - calc thickness of polygons RES THICK GE 66 CALC THICK = 66 AS RES THICK > 0 AND THICK LT 30 CALC THICK = 22 AS RES THICK GE 30 AND THICK LT 42 CALC THICK = 28 AS RES THICK GE 42 AND THICK LT 66 CALC THICK = 42 AS RES CTYPE96 (or CTYPE94) = 2 CALC THICK = 2 AS RES CTYPE96 (or CTYPE94) = 3 CALC THICK = 3 AS RES CTYPE96/94 = 5 CALC THICK = 5 RES CTYPE96/94 = 6 CALC THICK = 6 RES CTYPE96/94 = 9 CALC THICK = 9 Q STOP Step 2 - the coverage was checked to determine that the universe polygon thickness had a value of zero. Step 3 - the coverage was reviewed for other polygons with thicknesses of zero. If these polygons were outside the crop they were calced to -99. Step 3 - a point coverage was created from the Coal Sections' INFO database that showed the coal thickness and confidentiality status of the drill hole. This point coverage was overlaid on the above resource coverage, and it was determined whether the thickness isopachs were justified by public data points. Isopachs based mostly on confidential data points were removed. (cd /coal1/strat/info4) SEL SELECT-POINTS-JAMIE PURGE SEL STRATGEO1 RES BY CO-CODE = [co-code] RES N-CODE = [seam#] REL SELECT-POINTS-JAMIE BY IDVS APPEND CALC $1COUNT = 0 REL SELECT-POINTS-JAMIE BY IDVS SEQ CALC $1THICKNESS = $1THICKNESS + THICKNESS CALC $1COUNT = $1COUNT + 1 SEL SELECT-POINTS-JAMIE RES COUNT = 0 PURGE REL STRATHEAD BY IDVS SEQ MOVE $1CONFIDENTIAL TO CONFIDENTIAL REL STRATLOC BY IDS SEQ CALC LAMCORX = $1LAMCORX CALC LAMCORY = $1LAMCORY CALC COUNT = $RECNO SEL TEMP-DUPS-JAMIE PURGE /*this next section removes duplicates REL SELECT-POINTS-JAMIE REL TEMP-DUPS-JAMIE BY IDS APPEND MOVE 'Y' TO $1CONFIDENTIAL REL TEMP-DUPS-JAMIE BY IDS SEQ CALC $1RECNO = $RECNO RES $1CONFIDENTIAL = 'Y' AND CONFIDENTIAL = 'N' CALC $1RECNO = $RECNO AS RES $1RECNO = $RECNO NSEL PURGE OUTPUT TEMP-JAMIE INIT RES LAMCORX < 1 PURGE CALC $COMMA-SWITCH = -1 DIS $RECNO,',',LAMCORX,',',LAMCORY PRINT cd /coal13/natl-coal-assmt/coal-isopachs/<seam>/<county> arc generate springpts input /coal1/strat/info4/temp-jamie point q build springpts point additem springpts.pat springpts.pat idvs 15 15 c additem springpts.pat springpts.pat confidential 1 1 c additem springpts.pat springpts.pat thickness 7 7 n 2 info arc ADIR /coal1/strat/info4 take sta SELECT-POINTS-JAMIE SEL SELECT-POINTS-JAMIE EXT /coal1/strat/info4/sta216dat SEL SPRINGPTS.PAT REL SELECT-POINTS-JAMIE BY SPRINGPTS-ID LINK MOVE $1CONFIDENTIAL TO CONFIDENTIAL MOVE $1IDVS TO IDVS CALC THICKNESS = $1THICKNESS Step 4 - the resource coverages were dissolved on thickness Example for Fayette County: dissolve res2790-fay ds2790-fay thick poly Step 5 - the state was divided into 3 regions and the dissolved county coverages within each region were mapjoined in Arc. Each region was reviewed for discrepancies across county boundaries, and edited accordingly. join1 = Warren, Knox, Peoria, Woodford, McLean, Tazewell, Fulton, Schuyler, Mason, Menard, Logan, Dewitt, Piatt, Macon, Sangamon, Christian, and Shelby counties. join2 = Douglas, Edgar, Coles, Cumberland, Clark, Effingham, Jasper, Crawford, Richland, Lawrence, Edwards, Wabash, and White counties. join3 = Fayette, Marion, Clay, Jefferson, Wayne, Hamilton, Franklin, Randolph, Perry, Jackson, Williamson, Saline, and Gallatin counties. Step 6 - After editing, the 3 regions were eventually mapjoined as one coverage, join123d. In this coverage all mines and mine boundaries (thick = 6 or thick = 9) were calced to the predominant thickness in the area (be it 22", 28", 42", or 66"), using both ArcEdit and ArcView. Step 7 - dissolve join123d join-total thick poly Step 8 - edit sliver polygons in join-total Step 9 - Pieces of the #5 crop that were needed were pulled from /coal3/coal-resources/statemaps/springcrop and put to join-total. Step 10 - There are counties that have Springfield coal data but do not have resource coverages (coal too thin for resource calculations). The isopachs for these counties were pulled from /coal3/coal-resources/statemaps/coal5-84 and put to join-total, and the polygons calced accordingly. Step 11 - dissolve join-total coal5-thick thick poly 2001 Metadata imported. withheld Metadata imported. withheld 20040326 10431900 Vector Simple FALSE 0 TRUE FALSE North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 GCS_North_American_1983 not applicable Explicit elevation coordinate included with horizontal coordinates ITEM_LABEL ITEM_LABEL String 20 0 0 THICK_COLC OBJECTID OID 4 10 0 Area of feature in internal units squared. Esri Positive real numbers that are automatically generated. Shape Shape Geometry 8 Feature geometry. ESRI Coordinates defining the features. 0 0 SHAPE Feature geometry. ESRI Coordinates defining the features. THICK_COLC SmallInteger 2 5 0 source_organization Source Organization String 255 0 0 hyperlink Link String 255 0 0 resource_date Date of Resource String 255 0 0 GISDB_COAL.IL_Colchester_Thickness_Py Feature Class 0 st_area(shape) st_area(shape) Double 0 0 0 st_perimeter(shape) st_perimeter(shape) Double 0 0 0 Attribute items are in typical ARC/INFO feature class format. User-defined attributes are: Polygon attributes: >THICK-COLCH - thickness of the Colchester Coal > 0 - outside limit of coal seam (crop holes) > 2 - coal split or thin > 3 - coal missing due to sandstone channels > 5 - insufficient data > 22 - coal is less than 28" thick > 28 - coal is from 28"-42" thick > 42 - coal is from 42"-66" thick > 66 - coal is greater than or equal to 66" thick > >ITEM_LABEL - text label of above thickness ranges none Illinois State Geological Survey Information Office mailing and physical address

615 East Peabody Drive

Champaign Illinois 61820 U.S.A. 217-244-2414 217-244-0802 isgs@isgs.uiuc.edu 8:00 a.m. - 5:00 p.m., Monday-Friday The Illinois Department of Natural Resources (DNR) provides these geographic data "as is." DNR makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. DNR further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers of DNR, no warranty, expressed or implied, is made by DNR regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty. In no event shall the DNR have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by DNR. Downloadable Data 0.000 0.000 20040325 20021009 Illinois State Geological Survey Christopher P. Korose mailing and physical address

615 East Peabody Drive

Champaign Illinois 61820 U.S.A. 217-333-7256 217-333-2830 korose@isgs.uiuc.edu 8:00 a.m. - 5:00 p.m., Monday-Friday FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time This metadata document is intended for public distribution none http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile en 20230202 09151400 FALSE 20230602 21201700 20230602 21201700 IL_Colchester_Thickness_Py 002 Projected GCS_WGS_1984 Linear Unit: Meter (1.000000) <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/3.1.0'><WKT>PROJCS[&quot;WGS_1984_Web_Mercator_Auxiliary_Sphere&quot;,GEOGCS[&quot;GCS_WGS_1984&quot;,DATUM[&quot;D_WGS_1984&quot;,SPHEROID[&quot;WGS_1984&quot;,6378137.0,298.257223563]],PRIMEM[&quot;Greenwich&quot;,0.0],UNIT[&quot;Degree&quot;,0.0174532925199433]],PROJECTION[&quot;Mercator_Auxiliary_Sphere&quot;],PARAMETER[&quot;False_Easting&quot;,0.0],PARAMETER[&quot;False_Northing&quot;,0.0],PARAMETER[&quot;Central_Meridian&quot;,0.0],PARAMETER[&quot;Standard_Parallel_1&quot;,0.0],PARAMETER[&quot;Auxiliary_Sphere_Type&quot;,0.0],UNIT[&quot;Meter&quot;,1.0],AUTHORITY[&quot;EPSG&quot;,3857]]</WKT><XOrigin>-20037700</XOrigin><YOrigin>-30241100</YOrigin><XYScale>10000</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>102100</WKID><LatestWKID>3857</LatestWKID></ProjectedCoordinateSystem> WGS_1984_Web_Mercator_Auxiliary_Sphere 1.0 Esri ArcGIS 13.1.0.41833 IL_Colchester_Thickness_Py -91.216208 -87.495214 41.522633 37.59129 1 -91.216208 -87.495214 41.522633 37.59129 1 ISO 19115 Geographic Information - Metadata DIS_ESRI1.0 dataset 002 withheld Local Area Network 0.000 Shapefile Enterprise Geodatabase Feature Class GCS_North_American_1983 EPSG 6.18.3(9.3.1.2) 0 20230602