# Relationship history for MSHA mine 3001708

Current hierarchy: **Mc Kee Alex D → Mc Kee Brothers Inc → Mc Kee Brothers Incorporated**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Mc Kee Alex D → Mc Kee Brothers Incorporated; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Goldenarea Aggregates Inc → Mc Kee Brothers Incorporated; 1950-01-01 to 1979-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Goldenarea Aggregates Inc → Mc Kee Brothers Incorporated; 1950-01-01 to 1979-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Goldenarea Aggregates Inc → Goldenarea Aggregates Inc; 1950-01-01 to 1979-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Mc Kee Brothers Inc → Mc Kee Brothers Incorporated; 1979-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Kee Alex D → Mc Kee Brothers Inc; 1979-05-01 to current/open; source msha-controller-operator-history