# Relationship history for MSHA mine 1501054

Current hierarchy: **Elmore Jesse & Ben Sproles → E & C Coal Co → No 1 Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** B & R Coal Co → No 1 Mine; 1950-01-01 to 1974-08-20; source msha-controller-operator-history
- **controller_controls_mine:** Breeding Bobby Joe & William Johnson → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Breeding Bobby Joe & William Johnson → B & R Coal Co; 1950-01-01 to 1974-08-20; source msha-controller-operator-history
- **controller_controls_mine:** Marcum Thomas Ray → No 1 Mine; 1974-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** M & H Coal Inc → No 1 Mine; 1974-08-21 to 1976-03-17; source msha-controller-operator-history
- **controller_controls_operator:** Marcum Thomas Ray → M & H Coal Inc; 1974-08-21 to 1976-03-17; source msha-controller-operator-history
- **operator_operates_mine:** E & C Coal Co → No 1 Mine; 1976-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Elmore Jesse & Ben Sproles → No 1 Mine; 1976-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elmore Jesse & Ben Sproles → E & C Coal Co; 1976-03-18 to current/open; source msha-controller-operator-history