# Relationship history for MSHA mine 4406574

Current hierarchy: **Bob  Belcher → T M Fuels Inc → Mine 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:** James A  Sigmon → Mine No 2; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Theodore  Yates et al → Mine No 2; 1989-02-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Har-Lee Coal Company Inc → Mine No 2; 1990-03-01 to 1990-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Theodore  Yates et al → Har-Lee Coal Company Inc; 1990-03-01 to 1990-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Bob  Belcher → Mine No 2; 1990-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hicks Robert A → Mine No 2; 1990-12-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sigmon Coal Company Inc → Mine No 2; 1991-01-01 to 1991-03-27; source msha-controller-operator-history
- **controller_controls_operator:** James A  Sigmon → Sigmon Coal Company Inc; 1991-01-01 to 1991-03-27; source msha-controller-operator-history
- **operator_operates_mine:** Big Dog Coal Company Inc → Mine No 2; 1991-03-28 to 1992-02-12; source msha-controller-operator-history
- **controller_controls_operator:** Hicks Robert A → Big Dog Coal Company Inc; 1991-03-28 to 1992-02-12; source msha-controller-operator-history
- **operator_operates_mine:** Sigmon Coal Company Inc → Mine No 2; 1992-02-13 to 1992-03-19; source msha-controller-operator-history
- **controller_controls_operator:** James A  Sigmon → Sigmon Coal Company Inc; 1992-02-13 to 1992-03-19; source msha-controller-operator-history
- **operator_operates_mine:** T M Fuels Inc → Mine No 2; 1992-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bob  Belcher → T M Fuels Inc; 1992-03-20 to current/open; source msha-controller-operator-history