# Relationship history for MSHA mine 4401776

Current hierarchy: **Layne Earnest → H & L Coal 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:** R & R Coal Company → No 1 Mine; 1950-01-01 to 1970-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Rife Hufford → No 1 Mine; 1950-01-01 to 1970-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Rife Hufford → R & R Coal Company; 1950-01-01 to 1970-12-31; source msha-controller-operator-history
- **operator_operates_mine:** L & J Coal Company → No 1 Mine; 1971-01-01 to 1971-08-31; source msha-controller-operator-history
- **controller_controls_mine:** James  Little → No 1 Mine; 1971-01-01 to 1971-08-31; source msha-controller-operator-history
- **controller_controls_operator:** James  Little → L & J Coal Company; 1971-01-01 to 1971-08-31; source msha-controller-operator-history
- **operator_operates_mine:** H & L Coal Company → No 1 Mine; 1971-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Layne Earnest → No 1 Mine; 1971-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Layne Earnest → H & L Coal Company; 1971-09-01 to current/open; source msha-controller-operator-history