# Relationship history for MSHA mine 3605070

Current hierarchy: **Overly L W → L W Overly → Overly**

- 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:** L W Overly → Overly; 1972-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Overly L W → Overly; 1972-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Overly L W → L W Overly; 1972-09-01 to current/open; source msha-controller-operator-history