# Relationship history for MSHA mine 4604824

Current hierarchy: **Mc Million Virgil & George Cline → L & R Mine Company → 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:** L & R Coal Company → No 1 Mine; 1975-08-01 to 1977-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Lee Billy → No 1 Mine; 1975-08-01 to 1977-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Lee Billy → L & R Coal Company; 1975-08-01 to 1977-09-30; source msha-controller-operator-history
- **operator_operates_mine:** L & R Mine Company → No 1 Mine; 1977-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Million Virgil & George Cline → No 1 Mine; 1977-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Million Virgil & George Cline → L & R Mine Company; 1977-10-01 to current/open; source msha-controller-operator-history