# Relationship history for MSHA mine 3607801

Current hierarchy: **Moore William W Jr → M & K Coal Company → No 1 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:** M & K Coal Company → No 1 Slope; 1986-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Moore William W Jr → No 1 Slope; 1986-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Moore William W Jr → M & K Coal Company; 1986-05-01 to current/open; source msha-controller-operator-history