# Relationship history for MSHA mine 5001587

Current hierarchy: **Shaffer W L → G H D Resources Partners Ltd → Kiwalik Flats**

- 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:** Shaffer W L → Kiwalik Flats; 1988-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** G H D Resources Partners Ltd → Kiwalik Flats; 1989-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shaffer W L → G H D Resources Partners Ltd; 1989-08-01 to current/open; source msha-controller-operator-history