# Relationship history for MSHA mine 4605843

Current hierarchy: **Collins Roy L → Columbus Mining & Construction Inc → Surface Mine 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

- **operator_operates_mine:** Turkey Bone Coal Inc → Surface Mine No 1; 1978-07-01 to 1981-07-26; source msha-controller-operator-history
- **controller_controls_mine:** Hanna Hubert → Surface Mine No 1; 1978-07-01 to 1981-07-26; source msha-controller-operator-history
- **controller_controls_operator:** Hanna Hubert → Turkey Bone Coal Inc; 1978-07-01 to 1981-07-26; source msha-controller-operator-history
- **operator_operates_mine:** Red Star Enterprises Inc → Surface Mine No 1; 1981-07-27 to 1982-02-24; source msha-controller-operator-history
- **controller_controls_mine:** Jones Ernest R → Surface Mine No 1; 1981-07-27 to 1982-02-24; source msha-controller-operator-history
- **controller_controls_operator:** Jones Ernest R → Red Star Enterprises Inc; 1981-07-27 to 1982-02-24; source msha-controller-operator-history
- **operator_operates_mine:** Columbus Mining & Construction Inc → Surface Mine No 1; 1982-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Collins Roy L → Surface Mine No 1; 1982-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Collins Roy L → Columbus Mining & Construction Inc; 1982-02-25 to current/open; source msha-controller-operator-history