# Relationship history for MSHA mine 1511423

Current hierarchy: **Ruby J Edwin Jr → Middle Kentucky Construction Inc → Crapshooter #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:** Ruby J Edwin Jr → Crapshooter #3; 1976-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Middle Kentucky Construction Inc → Crapshooter #3; 1978-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ruby J Edwin Jr → Middle Kentucky Construction Inc; 1978-07-01 to current/open; source msha-controller-operator-history