| Mine Name and YSU Mine Number | HOLROYD | MAHO000039 |
| Townships | Green | ... | ... | Quadrangle 001 | Salem Quad |
| Lots | SEC. 21 | Quadrangle 002 | ... |
| County, State | Mahoning | OH | UTM |
| DOM Map Number | MG-38 | Seam Elevation |
| OGS Mine Number | Seam Thickness |
| USBM Document Number | 321566 | Cover Thickness |
| Mine Type and Commodity Mined | DRIFT | COAL | Drain Level |
| Seam Code 001 | Seam Information Unavailable | Hazard Potential | LOW |
| Seam Code 002 | Seam Information Unavailable | Mapped | Yes |
| Date Opened | Date Closed | 1919 | Located | Yes |
| Operator 001 | SAM HOLROYD | 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: location in Sec. 21; mine has fallen; connection to an abandoned mine. This mine |
| not located. |
| Last Update: | Wednesday, February 17, 1999 |