| Mine Name and YSU Mine Number | WILLIAMS | MAHO000078 |
| Townships | Beaver | ... | ... | Quadrangle 001 | Columbiana Quad |
| Lots | SEC. 13 | Quadrangle 002 | ... |
| County, State | Mahoning | OH | UTM | 17 474,300 2,511,900 |
| DOM Map Number | MG-74 | Seam Elevation | 1098' |
| OGS Mine Number | Seam Thickness |
| USBM Document Number | 321582 | Cover Thickness | 48' ASO |
| Mine Type and Commodity Mined | SHAFT | COAL | Drain Level | ABOVE |
| Seam Code 001 | BROOKVILLE, CONWAY, NO.4, NO.3B | Hazard Potential | HIGH |
| Seam Code 002 | Seam Information Unavailable | Mapped | Yes |
| Date Opened | 1946 | Date Closed | 1949 | Located | Yes |
| Operator 001 | WILLIAMS COAL CO. | Operator 001 Date Opened |
| Operator 001 Date Closed |
| Operator 002 | ... | Operator 002 Date Opened |
| Operator 002 Date Closed |
| Operator 003 | ... | Operator 003 Date Opened |
| Operator 003 Date Closed |
| Operator 004 | ... | Operator 004 Date Opened |
| Operator 004 Date Closed |
| Operator 005 | ... | Operator 005 Date Opened |
| Operator 005 Date Closed |
| Operator 006 | ... | Operator 006 Date Opened |
| Operator 006 Date Closed |
| Operator 007 | ... | Operator 007 Date Opened |
| Operator 007 Date Closed |
| Operator 008 | ... | Operator 008 Date Opened |
| Operator 008 Date Closed |
| Remarks | Mine map [1] shows: coal elev. 1098.06' at shaft, 1098.06- 1090.40'; shaft, 48.35;, top elev. 1146.41', |
| bottom elev. 1098.06'; shaft @ 100' SE of South Ave. Rd.; an area marked "old workings abandoned" |
| & "Cave-in"; 1 air shaft; outcrop & elev. of "Upper Strip Vein" or "No. 5 Strip Vein" at 1130.20' |
| (bottom of vein); and workings to Mg-61. County mine No. Mg 509. |
| Last Update: | Wednesday, February 17, 1999 |