# Relationship history for MSHA mine 1516449

Current hierarchy: **Middleton Darrell → Precieux Coals Inc → No 2**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Middleton Darrell Et Al → No 2; 1988-07-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Safco Mining Inc → No 2; 1988-08-01 to 1989-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Seals Cecil → No 2; 1988-08-01 to 1989-02-14; source msha-controller-operator-history
- **controller_controls_operator:** Seals Cecil → Safco Mining Inc; 1988-08-01 to 1989-02-14; source msha-controller-operator-history
- **operator_operates_mine:** Martins Fork Coal Company → No 2; 1989-02-15 to 1989-03-08; source msha-controller-operator-history
- **controller_controls_mine:** Seals George-Frank Saylor Et Al → No 2; 1989-02-15 to 1989-03-08; source msha-controller-operator-history
- **controller_controls_operator:** Seals George-Frank Saylor Et Al → Martins Fork Coal Company; 1989-02-15 to 1989-03-08; source msha-controller-operator-history
- **operator_operates_mine:** Precieux Coals Inc → No 2; 1989-03-09 to 1989-07-17; source msha-controller-operator-history
- **controller_controls_operator:** Middleton Darrell Et Al → Precieux Coals Inc; 1989-03-09 to 1989-07-17; source msha-controller-operator-history
- **controller_controls_mine:** Poteet Jerry & Randy Miller → No 2; 1989-05-03 to 1990-05-28; source msha-controller-operator-history
- **operator_operates_mine:** P & M Coal Inc → No 2; 1989-07-18 to 1990-05-28; source msha-controller-operator-history
- **controller_controls_operator:** Poteet Jerry & Randy Miller → P & M Coal Inc; 1989-07-18 to 1990-05-28; source msha-controller-operator-history
- **operator_operates_mine:** Precieux Coals Inc → No 2; 1990-05-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Middleton Darrell Et Al → Precieux Coals Inc; 1990-05-29 to current/open; source msha-controller-operator-history