# Relationship history for MSHA mine 3607652

Current hierarchy: **Valli August → Greene County Coal Company → Mcnatt Strip**

- 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:** Greene County Coal Company → Mcnatt Strip; 1985-01-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Valli August → Mcnatt Strip; 1985-01-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Valli August → Greene County Coal Company; 1985-01-07 to current/open; source msha-controller-operator-history