# Relationship history for MSHA mine 4402491

Current hierarchy: **Clark Larry Ronald → M A C Mining Inc → No 1 Strip**

- 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:** Habco Inc → No 1 Strip; 1950-01-01 to 1978-08-13; source msha-controller-operator-history
- **controller_controls_mine:** Harris Charles → No 1 Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harris Charles → Habco Inc; 1950-01-01 to 1978-08-13; source msha-controller-operator-history
- **operator_operates_mine:** M A C Mining Inc → No 1 Strip; 1978-08-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Clark Larry Ronald → No 1 Strip; 1978-08-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clark Larry Ronald → M A C Mining Inc; 1978-08-14 to current/open; source msha-controller-operator-history