# Relationship history for MSHA mine 4403856

Current hierarchy: **Cowan James D → Mary Lou Coal Corp → No 1 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:** Stacy Chuck Et Al → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cheyenne Coal Corp → No 1 Mine; 1974-01-01 to 1975-10-14; source msha-controller-operator-history
- **controller_controls_operator:** Stacy Chuck Et Al → Cheyenne Coal Corp; 1974-01-01 to 1975-10-14; source msha-controller-operator-history
- **operator_operates_mine:** Triple R Coal Co → No 1 Mine; 1975-10-15 to 1975-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Baker Roger & Edgar Jr → No 1 Mine; 1975-10-15 to 1975-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Baker Roger & Edgar Jr → Triple R Coal Co; 1975-10-15 to 1975-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Dotson John W & Harold Fred Justus → No 1 Mine; 1975-12-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** L & M Coal Company → No 1 Mine; 1976-01-01 to 1976-04-20; source msha-controller-operator-history
- **controller_controls_mine:** Murphy Luther C → No 1 Mine; 1976-01-01 to 1976-04-20; source msha-controller-operator-history
- **controller_controls_operator:** Murphy Luther C → L & M Coal Company; 1976-01-01 to 1976-04-20; source msha-controller-operator-history
- **operator_operates_mine:** Hiarm Fork Coal Company → No 1 Mine; 1976-04-21 to 1976-06-28; source msha-controller-operator-history
- **controller_controls_mine:** Justus Donald Et Al → No 1 Mine; 1976-04-21 to 1976-06-28; source msha-controller-operator-history
- **controller_controls_operator:** Justus Donald Et Al → Hiarm Fork Coal Company; 1976-04-21 to 1976-06-28; source msha-controller-operator-history
- **operator_operates_mine:** Dotson & Justus Coal Company Inc → No 1 Mine; 1976-06-29 to 1976-11-15; source msha-controller-operator-history
- **controller_controls_operator:** Dotson John W & Harold Fred Justus → Dotson & Justus Coal Company Inc; 1976-06-29 to 1976-11-15; source msha-controller-operator-history
- **operator_operates_mine:** J S & L Coal Company → No 1 Mine; 1976-11-16 to 1977-11-27; source msha-controller-operator-history
- **controller_controls_mine:** Justus Theodore--Carl Stacy & Alvin Lester → No 1 Mine; 1976-11-16 to 1977-11-27; source msha-controller-operator-history
- **controller_controls_operator:** Justus Theodore--Carl Stacy & Alvin Lester → J S & L Coal Company; 1976-11-16 to 1977-11-27; source msha-controller-operator-history
- **operator_operates_mine:** J S & L Coal Company → No 1 Mine; 1977-11-28 to 1978-02-01; source msha-controller-operator-history
- **controller_controls_mine:** Justus Steven & Timothy Dotson → No 1 Mine; 1977-11-28 to 1978-02-01; source msha-controller-operator-history
- **controller_controls_operator:** Justus Steven & Timothy Dotson → J S & L Coal Company; 1977-11-28 to 1978-02-01; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Mining Enterprises → No 1 Mine; 1978-02-02 to 1978-08-13; source msha-controller-operator-history
- **controller_controls_mine:** Looney John W & Herman Garrett → No 1 Mine; 1978-02-02 to 1978-08-13; source msha-controller-operator-history
- **controller_controls_operator:** Looney John W & Herman Garrett → Mountain Mining Enterprises; 1978-02-02 to 1978-08-13; source msha-controller-operator-history
- **operator_operates_mine:** Mary Lou Coal Corp → No 1 Mine; 1978-08-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cowan James D → No 1 Mine; 1978-08-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cowan James D → Mary Lou Coal Corp; 1978-08-14 to current/open; source msha-controller-operator-history