# Relationship history for MSHA mine 1512429

Current hierarchy: **O'Dean  Holbrook → Little O Coal Company Inc → No 1**

- 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:** P & E Coal Company Inc → No 1; 1980-07-01 to 1985-10-15; source msha-controller-operator-history
- **controller_controls_mine:** Adkins Earl Et Al → No 1; 1980-07-01 to 1985-10-15; source msha-controller-operator-history
- **controller_controls_operator:** Adkins Earl Et Al → P & E Coal Company Inc; 1980-07-01 to 1985-10-15; source msha-controller-operator-history
- **operator_operates_mine:** Ouray Mining Company Inc → No 1; 1985-10-16 to 1987-11-24; source msha-controller-operator-history
- **controller_controls_mine:** Isaac Basil → No 1; 1985-10-16 to 1987-11-24; source msha-controller-operator-history
- **controller_controls_operator:** Isaac Basil → Ouray Mining Company Inc; 1985-10-16 to 1987-11-24; source msha-controller-operator-history
- **operator_operates_mine:** Little O Coal Company Inc → No 1; 1987-11-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** O'Dean  Holbrook → No 1; 1987-11-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** O'Dean  Holbrook → Little O Coal Company Inc; 1987-11-25 to current/open; source msha-controller-operator-history