Mine Index Number: 0005
Accessible description: Mine Name and Data Summary
| Company Name:
|
Wilmington Star Mining Company
|
| Mine Name:
|
Wilmington Star No. 7 Mine
|
| Start Date:
|
1904
|
End Date:
|
March 20, 1926
|
| Type of Mine:
|
Underground
|
| Total acres shown:
|
275
|
| Acres after map date:
|
6
|
General Area of mining acres shown:
|
|
|
|
Shaft, Slope, Drift or Tipple Location(s)
| Type
|
County
|
Township-Range
|
Section
|
Part Section
|
| Shaft Type |
County |
Township-Range |
Section |
Part Section
|
| Main shaft
|
Grundy
|
32N 8E
|
5
|
NW SE NE
|
| Shaft Type |
County |
Township-Range |
Section |
Part Section
|
| Air shaft
|
Grundy
|
32N 8E
|
5
|
NW SE NE
|
Geology
| Seam |
Depth (ft) |
Thickness Min |
Thickness max |
Thickness Ave. |
Mining Method
|
| Colchester
|
182
|
2.0
|
3.08
|
2.67-3.0
|
LW
|
Geological Problems Reported
Numerous faults were reported in all parts of the mine, with displacement ranging from 1 to 15 feet. A normal fault with 10 feet of displacement and adjacent to a large roll resulted in one entry’s abandonment. The roof was “soapstone”, a gray, clay-rich shale, or occasionally a shaly sandstone. Slip planes in the shale were nearly vertical and poorly developed. The shaft was sunk at the bottom of a basin or syncline, making the coal at the shaft nearly 60 feet lower than the surrounding area. The seam was deeper to the north, with a 20- degree incline upslope to the east, west and south. This made drainage easy, but a few years after sinking the shaft, this necessitated making a tunnel to the coal about 50 feet above the shaft bottom to connect with the higher coal. Impurities in the coal included lenses of shale and pyrite in lenses and concretions. Very little calcite was noted at this mine. Coal cleat was poorly developed. Some heaving was reported.
Production
| Company
|
Mine Name
|
Date
|
Production (tons)
|
| Company |
Mine Name |
Date |
Production (tons)
|
|
|
|
|
|
| Total Production: 1,327,862
|
Production Notes
Coal Report production (if available)
Sources of Data
| Source Map |
Map Date |
Original Scale |
Digitized Scale |
Map Type
|
| Microfilm, document 351475
|
7-1925
|
1:2400
|
1:5131
|
Not final
|
| Bibliography
|
| Coal Reports - Production, ownership, years of operation, seam, thickness.
|
| Bibliography
|
| Directory of Illinois Coal Mines (Grundy County) - Mine names, mine index, ownership, years of operation.
|
| Bibliography
|
| Mine notes (Grundy County) - Mine type, shaft location, depth, thickness, geologic problems, abandoned date.
|
| Bibliography
|
| Microfilm map, document 351475, reel 03136, frame 221 - Shaft locations, mine outline, mining method.
|
Mine Notes
Mine Images
Photographs
Notes
- ↑ Production after map date.
