# Relationship history for MSHA mine 5001622

Current hierarchy: **John R  Andresen → Andresen Mining → Soo 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:** Walton Mining & Equipment → Soo Mine; 1994-07-01 to 2022-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Walton Charley & Ross → Soo Mine; 1994-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Walton Charley & Ross → Walton Mining & Equipment; 1994-07-01 to 2022-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Andresen Mining → Soo Mine; 2022-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John R  Andresen → Soo Mine; 2022-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John R  Andresen → Andresen Mining; 2022-08-01 to current/open; source msha-controller-operator-history