# Relationship history for MSHA mine 4405119

Current hierarchy: **Potter Billy D & Jimmy R Dotson → Potter & Dotson Coal Company Inc → 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:** Lester Robert F → No 4; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Potter Billy D & Jimmy R Dotson → No 4; 1976-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R & E Coal Company Inc → No 4; 1978-10-01 to 1980-04-23; source msha-controller-operator-history
- **controller_controls_operator:** Lester Robert F → R & E Coal Company Inc; 1978-10-01 to 1980-04-23; source msha-controller-operator-history
- **operator_operates_mine:** Potter & Dotson Coal Company Inc → No 4; 1980-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Potter Billy D & Jimmy R Dotson → Potter & Dotson Coal Company Inc; 1980-04-24 to current/open; source msha-controller-operator-history