# Relationship history for MSHA mine 3605492

Current hierarchy: **Moyer Milton B → Milton B Moyer Construction → Bolich Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Milton B Moyer Construction → Bolich Mine; 1975-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Moyer Milton B → Bolich Mine; 1975-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Moyer Milton B → Milton B Moyer Construction; 1975-01-01 to current/open; source msha-controller-operator-history