# Relationship history for MSHA mine 1201764

Current hierarchy: **Schopmeyer Wayne-Michael D & Wayne Lynn → Schopmeyer Mining → Pit Apollo No 1**

- 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:** Schopmeyer Mining → Pit Apollo No 1; 1980-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Schopmeyer Wayne-Michael D & Wayne Lynn → Pit Apollo No 1; 1980-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Schopmeyer Wayne-Michael D & Wayne Lynn → Schopmeyer Mining; 1980-02-01 to current/open; source msha-controller-operator-history