# Relationship history for MSHA mine 3607759

Current hierarchy: **Shade Clayton W - Marlin Shade → Shade No 2 Coal Company → Shade No 2 - 4 Vein 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Shade No 2 Coal Company → Shade No 2 - 4 Vein Slope; 1985-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shade Clayton W - Marlin Shade Et Al → Shade No 2 - 4 Vein Slope; 1985-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shade Clayton W - Marlin Shade Et Al → Shade No 2 Coal Company; 1985-11-01 to current/open; source msha-controller-operator-history