# Relationship history for MSHA mine 1516707

Current hierarchy: **Paul E  Roberts → Roberts Brothers Coal Company Inc → Cardinal No 11**

- 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:** Paul E  Roberts et al → Cardinal No 11; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Coy John P → Cardinal No 11; 1988-02-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Prosperity Mining Inc → Cardinal No 11; 1989-08-01 to 1991-08-12; source msha-controller-operator-history
- **controller_controls_operator:** Mc Coy John P → Prosperity Mining Inc; 1989-08-01 to 1991-08-12; source msha-controller-operator-history
- **operator_operates_mine:** Roberts Brothers Coal Company Inc → Cardinal No 11; 1991-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul E  Roberts et al → Roberts Brothers Coal Company Inc; 1991-08-13 to current/open; source msha-controller-operator-history