# Relationship history for MSHA mine 4604707

Current hierarchy: **Wilson Amos → Huff 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Sizemore James N → No 2; 1975-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mark Iii Coal Company Inc → No 2; 1975-07-21 to 1981-04-05; source msha-controller-operator-history
- **controller_controls_operator:** Sizemore James N → Mark Iii Coal Company Inc; 1975-07-21 to 1981-04-05; source msha-controller-operator-history
- **controller_controls_mine:** Tomblin Archie & Paul → No 2; 1979-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Turkeypen-Mark Iii Coal Company Inc → No 2; 1981-04-06 to 1981-06-23; source msha-controller-operator-history
- **controller_controls_mine:** Tomblin Millard → No 2; 1981-04-06 to 1981-06-23; source msha-controller-operator-history
- **controller_controls_operator:** Tomblin Millard → Turkeypen-Mark Iii Coal Company Inc; 1981-04-06 to 1981-06-23; source msha-controller-operator-history
- **operator_operates_mine:** Huff Inc → No 2; 1981-06-24 to 1983-07-18; source msha-controller-operator-history
- **controller_controls_operator:** Tomblin Archie & Paul → Huff Inc; 1981-06-24 to 1983-07-18; source msha-controller-operator-history
- **operator_operates_mine:** Huff Inc → No 2; 1983-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wilson Amos → No 2; 1983-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wilson Amos → Huff Inc; 1983-07-19 to current/open; source msha-controller-operator-history