# Relationship history for MSHA mine 4405187

Current hierarchy: **Omalene  Deel → Golden Chip Coal Company Inc → No 8 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Omalene  Deel et al → No 8 Mine; 1975-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Golden Chip Coal Company Inc → No 8 Mine; 1979-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Omalene  Deel et al → Golden Chip Coal Company Inc; 1979-03-01 to current/open; source msha-controller-operator-history