# Relationship history for MSHA mine 4404045

Current hierarchy: **Gary  Dotson → Camp Coal Company Inc → Mine No 4**

- 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:** Gary  Dotson  et al → Mine No 4; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dotson Bobby & James Little → Mine No 4; 1974-04-01 to 1985-03-26; source msha-controller-operator-history
- **operator_operates_mine:** T B & J Coal → Mine No 4; 1975-03-15 to 1985-03-26; source msha-controller-operator-history
- **controller_controls_operator:** Dotson Bobby & James Little → T B & J Coal; 1975-03-15 to 1985-03-26; source msha-controller-operator-history
- **operator_operates_mine:** Camp Coal Company Inc → Mine No 4; 1985-03-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gary  Dotson  et al → Camp Coal Company Inc; 1985-03-27 to current/open; source msha-controller-operator-history