# Relationship history for MSHA mine 3605196

Current hierarchy: **Snyder Leroy-Ben Witmer → K W & S Coal Company → No 3 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:** K W & S Coal Company → No 3 Slope; 1974-08-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Snyder Leroy-Ben Witmer Et Al → No 3 Slope; 1974-08-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Snyder Leroy-Ben Witmer Et Al → K W & S Coal Company; 1974-08-22 to current/open; source msha-controller-operator-history