# Relationship history for MSHA mine 3605222

Current hierarchy: **Shade Clayton W - Marlin Shade → Shade Coal Company → Buck Mountain Slope**

- 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:** Shade Coal Company → Buck Mountain Slope; 1974-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shade Clayton W - Marlin Shade Et Al → Buck Mountain Slope; 1974-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shade Clayton W - Marlin Shade Et Al → Shade Coal Company; 1974-09-01 to current/open; source msha-controller-operator-history