# Relationship history for MSHA mine 4605968

Current hierarchy: **A & K Capital Inc → A & K Coal Company → Turkey Run Surface**

- 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:** A & K Coal Company → Turkey Run Surface; 1979-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** A & K Capital Inc Et Al → Turkey Run Surface; 1979-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** A & K Capital Inc Et Al → A & K Coal Company; 1979-02-01 to current/open; source msha-controller-operator-history