| Mine Name and YSU Mine Number | PORTER | MAHO000174 |
| Townships | Austintown | ... | ... | Quadrangle 001 | No Quad Given |
| Lots | Quadrangle 002 | ... |
| County, State | Mahoning | OH | UTM |
| DOM Map Number | Seam Elevation |
| OGS Mine Number | Seam Thickness | 4'6" |
| USBM Document Number | Cover Thickness |
| Mine Type and Commodity Mined | COAL | Drain Level |
| Seam Code 001 | UPPER FREEPORT | Hazard Potential |
| Seam Code 002 | Seam Information Unavailable | Mapped | No |
| Date Opened | Date Closed | Located | No |
| Operator 001 | WM. PORTER | 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 | Measured section [27]. |
| Last Update: | Wednesday, February 17, 1999 |