# Relationship history for MSHA mine 1500995

Current hierarchy: **Sexton Bill → B & S Coal Co → 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Buck Creek Coal Co → No 1; 1950-01-01 to 1974-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Everidge Emitt → No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Everidge Emitt → Buck Creek Coal Co; 1950-01-01 to 1974-09-30; source msha-controller-operator-history
- **operator_operates_mine:** S & S Coal Co → No 1; 1974-10-01 to 1976-03-04; source msha-controller-operator-history
- **controller_controls_mine:** Sexton Gomer Et Al → No 1; 1974-10-01 to 1976-03-04; source msha-controller-operator-history
- **controller_controls_operator:** Sexton Gomer Et Al → S & S Coal Co; 1974-10-01 to 1976-03-04; source msha-controller-operator-history
- **operator_operates_mine:** B & S Coal Co → No 1; 1976-03-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sexton Bill → No 1; 1976-03-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sexton Bill → B & S Coal Co; 1976-03-05 to current/open; source msha-controller-operator-history