# Relationship history for MSHA mine 4604919

Current hierarchy: **Hunt Vernon → Vernon Mining Inc → No 1 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

- **operator_operates_mine:** Cline'S Inc → No 1 Mine; 1975-11-01 to 1977-06-21; source msha-controller-operator-history
- **controller_controls_mine:** Cline Gordon & Gordie → No 1 Mine; 1975-11-01 to 1977-06-21; source msha-controller-operator-history
- **controller_controls_operator:** Cline Gordon & Gordie → Cline'S Inc; 1975-11-01 to 1977-06-21; source msha-controller-operator-history
- **operator_operates_mine:** Cline'S Inc → No 1 Mine; 1977-06-22 to 1981-07-12; source msha-controller-operator-history
- **controller_controls_mine:** Richard T  Hatfield et al → No 1 Mine; 1977-06-22 to 1981-07-12; source msha-controller-operator-history
- **controller_controls_operator:** Richard T  Hatfield et al → Cline'S Inc; 1977-06-22 to 1981-07-12; source msha-controller-operator-history
- **operator_operates_mine:** Vernon Mining Inc → No 1 Mine; 1981-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hunt Vernon → No 1 Mine; 1981-07-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hunt Vernon → Vernon Mining Inc; 1981-07-13 to current/open; source msha-controller-operator-history