# Relationship history for MSHA mine 4606764

Current hierarchy: **Marcum Thomas Wayne → Holden Conveyor 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

- **controller_controls_mine:** Marcum Thomas Wayne → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tomblin Emil → No 1; 1979-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mounts Jimmy-Jerry Cline Et Al → No 1; 1981-09-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pana Coals Inc → No 1; 1984-03-01 to 1985-05-29; source msha-controller-operator-history
- **controller_controls_mine:** Dingess John → No 1; 1984-03-01 to 1985-05-29; source msha-controller-operator-history
- **controller_controls_operator:** Dingess John → Pana Coals Inc; 1984-03-01 to 1985-05-29; source msha-controller-operator-history
- **operator_operates_mine:** Kristi Ann Coal Inc → No 1; 1985-05-30 to 1986-06-18; source msha-controller-operator-history
- **controller_controls_operator:** Mounts Jimmy-Jerry Cline Et Al → Kristi Ann Coal Inc; 1985-05-30 to 1986-06-18; source msha-controller-operator-history
- **operator_operates_mine:** C & M Mining Inc → No 1; 1986-06-19 to 1986-12-21; source msha-controller-operator-history
- **controller_controls_mine:** Chafin Edward → No 1; 1986-06-19 to 1986-12-21; source msha-controller-operator-history
- **controller_controls_operator:** Chafin Edward → C & M Mining Inc; 1986-06-19 to 1986-12-21; source msha-controller-operator-history
- **operator_operates_mine:** M & M Mining Company Inc → No 1; 1986-12-22 to 1989-03-01; source msha-controller-operator-history
- **controller_controls_mine:** Mitchell Richard → No 1; 1986-12-22 to 1989-03-01; source msha-controller-operator-history
- **controller_controls_operator:** Mitchell Richard → M & M Mining Company Inc; 1986-12-22 to 1989-03-01; source msha-controller-operator-history
- **operator_operates_mine:** Ethel Coals Inc → No 1; 1989-03-02 to 1990-03-11; source msha-controller-operator-history
- **controller_controls_mine:** Bailey Oliver → No 1; 1989-03-02 to 1990-03-11; source msha-controller-operator-history
- **controller_controls_operator:** Bailey Oliver → Ethel Coals Inc; 1989-03-02 to 1990-03-11; source msha-controller-operator-history
- **operator_operates_mine:** Ethel Coals Inc → No 1; 1990-03-12 to 1991-06-13; source msha-controller-operator-history
- **controller_controls_mine:** Wilson Leander J → No 1; 1990-03-12 to 1991-06-13; source msha-controller-operator-history
- **controller_controls_operator:** Wilson Leander J → Ethel Coals Inc; 1990-03-12 to 1991-06-13; source msha-controller-operator-history
- **operator_operates_mine:** Ethel Coals Inc → No 1; 1991-06-14 to 1992-04-20; source msha-controller-operator-history
- **controller_controls_operator:** Tomblin Emil → Ethel Coals Inc; 1991-06-14 to 1992-04-20; source msha-controller-operator-history
- **operator_operates_mine:** Holden Conveyor Inc → No 1; 1992-04-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marcum Thomas Wayne → Holden Conveyor Inc; 1992-04-21 to current/open; source msha-controller-operator-history