# Relationship history for MSHA mine 3101507

Current hierarchy: **Cox Al → Mannington Ceramic Tile → Mt Gilead Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Mid-State Tile Company → Mt Gilead Mine; 1950-01-01 to 1990-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Fred  McIntyre → Mt Gilead Mine; 1950-01-01 to 1990-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Fred  McIntyre → Mid-State Tile Company; 1950-01-01 to 1990-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Mannington Ceramic Tile → Mt Gilead Mine; 1990-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cox Al → Mt Gilead Mine; 1990-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cox Al → Mannington Ceramic Tile; 1990-04-01 to current/open; source msha-controller-operator-history