# Relationship history for MSHA mine 4502696

Current hierarchy: **Parkin Wayne T → Old King Coal Company Inc → Old King Coal**

- 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

- **operator_operates_mine:** Old King Coal Company Inc → Old King Coal; 1979-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Parkin Wayne T Et Al → Old King Coal; 1979-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Parkin Wayne T Et Al → Old King Coal Company Inc; 1979-08-01 to current/open; source msha-controller-operator-history