# Relationship history for MSHA mine 4405538

Current hierarchy: **Jackson Barry → R B J Trucking Inc → 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:** Sandy Hollow Coal Corp → No 1 Mine; 1980-11-01 to 1982-11-03; source msha-controller-operator-history
- **controller_controls_mine:** Clayburne Johnny → No 1 Mine; 1980-11-01 to 1982-11-03; source msha-controller-operator-history
- **controller_controls_operator:** Clayburne Johnny → Sandy Hollow Coal Corp; 1980-11-01 to 1982-11-03; source msha-controller-operator-history
- **operator_operates_mine:** Triple J Coal Company → No 1 Mine; 1982-11-04 to 1983-03-27; source msha-controller-operator-history
- **controller_controls_mine:** Church Donald-Joe Davis Jr & Jerry Manuel → No 1 Mine; 1982-11-04 to 1983-03-27; source msha-controller-operator-history
- **controller_controls_operator:** Church Donald-Joe Davis Jr & Jerry Manuel → Triple J Coal Company; 1982-11-04 to 1983-03-27; source msha-controller-operator-history
- **operator_operates_mine:** Triple J Coal Company → No 1 Mine; 1983-03-28 to 1983-09-18; source msha-controller-operator-history
- **controller_controls_mine:** Davis Joe Jr → No 1 Mine; 1983-03-28 to 1983-09-18; source msha-controller-operator-history
- **controller_controls_operator:** Davis Joe Jr → Triple J Coal Company; 1983-03-28 to 1983-09-18; source msha-controller-operator-history
- **operator_operates_mine:** R B J Trucking Inc → No 1 Mine; 1983-09-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jackson Barry → No 1 Mine; 1983-09-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jackson Barry → R B J Trucking Inc; 1983-09-19 to current/open; source msha-controller-operator-history