# Relationship history for MSHA mine 1511661

Current hierarchy: **Jones Edgar → R D K Inc → R D K No 10 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

- **controller_controls_mine:** Jones Edgar Et Al → R D K No 10 Mine; 1977-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R D K Inc → R D K No 10 Mine; 1978-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jones Edgar Et Al → R D K Inc; 1978-11-01 to current/open; source msha-controller-operator-history