# Relationship history for MSHA mine 3101953

Current hierarchy: **Gregory  Johnson → Johnson Paving Company Inc → Higgins Pit**

- 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:** Gregory  Johnson → Higgins Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Johnson Paving Company Inc → Higgins Pit; 1983-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gregory  Johnson → Johnson Paving Company Inc; 1983-03-01 to current/open; source msha-controller-operator-history