| Mine Name and YSU Mine Number | JOHN HENRY, THORNTON | MAHO000026 |
| Townships | Austintown | ... | ... | Quadrangle 001 | Warren Quad |
| Lots | TRACT 5 | Quadrangle 002 | ... |
| County, State | Mahoning | OH | UTM | 174 535,500 2,472,900 |
| DOM Map Number | MG-25 | Seam Elevation | 917';905'(TOPO) |
| OGS Mine Number | Seam Thickness | 1'6"-2'10" |
| USBM Document Number | 321587 | Cover Thickness | 113'ASO;115' |
| Mine Type and Commodity Mined | SHAFT | COAL | Drain Level | ABOVE&BELO |
| Seam Code 001 | JACKSON NO.1, MASSILLON, NO.1, SHARON | Hazard Potential | HIGH |
| Seam Code 002 | Seam Information Unavailable | Mapped | Yes |
| Date Opened | 1870 | Date Closed | 1890 | Located | Yes |
| Operator 001 | OHLTOWN COAL CO.,CASE,THORNTON & CO | Operator 001 Date Opened |
| Operator 001 Date Closed |
| Operator 002 | JOHN HENRY MINING CO. | Operator 002 Date Opened | 1879 |
| Operator 002 Date Closed | 1879 |
| Operator 003 | W. T. WILLIAMS & CO. | Operator 003 Date Opened | 1879 |
| Operator 003 Date Closed | 1882 |
| Operator 004 | H. BALDWIN | Operator 004 Date Opened | 1883 |
| Operator 004 Date Closed | 1887 |
| Operator 005 | H. BALDWIN & CO. | Operator 005 Date Opened | 1889 |
| Operator 005 Date Closed | 1889 |
| Operator 006 | BALDWIN & WILLIAMS | Operator 006 Date Opened | 1888 |
| Operator 006 Date Closed | 1888 |
| Operator 007 | BALDWIN & WILLIAMS | Operator 007 Date Opened | 1890 |
| Operator 007 Date Closed | 1890 |
| Operator 008 | ... | Operator 008 Date Opened |
| Operator 008 Date Closed |
| Remarks | Mine map [1] shows: 1 pumping shaft & 1 slope opening; Scotch air shaft & Vinegar Hill entries not |
| shown on map (1890). Connected with the Ohltown mine. Shaft, 113' x 6' x 8', opened in 1870 by |
| Case, Thornton, & Co. on the old Cleveland farm in Austintown Twp. [58]. The John Henry mine |
| and the Thornton mine are believed to be the same mine. This mine connects with the Ohltown |
| mine (Mg-44). Coal identified by elevation. |
| Last Update: | Wednesday, February 17, 1999 |