# Relationship history for MSHA mine 1510458

Current hierarchy: **Greene Floyd → G & B Coal Company 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

- **controller_controls_mine:** Adkins James L & Mike Little → No 1 Mine; 1975-11-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Puncheon Coal Inc → No 1 Mine; 1977-06-01 to 1977-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Adkins James L & Mike Little → Puncheon Coal Inc; 1977-06-01 to 1977-10-31; source msha-controller-operator-history
- **operator_operates_mine:** G & B Coal Company Inc → No 1 Mine; 1977-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Greene Floyd → No 1 Mine; 1977-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greene Floyd → G & B Coal Company Inc; 1977-11-01 to current/open; source msha-controller-operator-history