# Relationship history for MSHA mine 1518541

Current hierarchy: **Willis  Ring → Reedy Coal Co., Inc. → Mine No. 15**

- 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

- **controller_controls_mine:** Willis  Ring → Mine No. 15; 1985-01-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Reedy Coal Co., Inc. → Mine No. 15; 2002-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Willis  Ring → Reedy Coal Co., Inc.; 2002-04-22 to current/open; source msha-controller-operator-history