# Relationship history for MSHA mine 4604760

Current hierarchy: **Boliek Donald B → Iaeger Coal Sales → No 3 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

- **controller_controls_mine:** French  Hatfield et al → No 3 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C & D Coal Company → No 3 Mine; 1975-01-01 to 1975-12-02; source msha-controller-operator-history
- **controller_controls_mine:** Dawson Clinton → No 3 Mine; 1975-01-01 to 1975-12-02; source msha-controller-operator-history
- **controller_controls_operator:** Dawson Clinton → C & D Coal Company; 1975-01-01 to 1975-12-02; source msha-controller-operator-history
- **operator_operates_mine:** Iaeger Coal Sales → No 3 Mine; 1975-12-03 to 1977-09-30; source msha-controller-operator-history
- **controller_controls_operator:** French  Hatfield et al → Iaeger Coal Sales; 1975-12-03 to 1977-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Harold E  Cline et al → Iaeger Coal Sales; 1975-12-03 to 1977-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Iaeger Coal Sales → No 3 Mine; 1977-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Boliek Donald B → No 3 Mine; 1977-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Boliek Donald B → Iaeger Coal Sales; 1977-10-01 to current/open; source msha-controller-operator-history