# Relationship history for MSHA mine 1516370

Current hierarchy: **Robert C  Ratliff → T R & H Development Inc → No 3**

- 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:** Collinsworth Stephen → No 3; 1981-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert C  Ratliff → No 3; 1986-09-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Maverick Mining Inc → No 3; 1988-04-01 to 1988-06-26; source msha-controller-operator-history
- **controller_controls_operator:** Collinsworth Stephen → Maverick Mining Inc; 1988-04-01 to 1988-06-26; source msha-controller-operator-history
- **operator_operates_mine:** T R & H Development Inc → No 3; 1988-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert C  Ratliff → T R & H Development Inc; 1988-06-27 to current/open; source msha-controller-operator-history