# Relationship history for MSHA mine 1513300

Current hierarchy: **Curtis  Francis → Big Hill Mining Inc → No 9**

- 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:** Moses  Case → No 9; 1981-10-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Case Mining Inc → No 9; 1982-01-01 to 1982-03-30; source msha-controller-operator-history
- **controller_controls_operator:** Moses  Case → Case Mining Inc; 1982-01-01 to 1982-03-30; source msha-controller-operator-history
- **operator_operates_mine:** Big Hill Mining Inc → No 9; 1982-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Curtis  Francis → No 9; 1982-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Curtis  Francis → Big Hill Mining Inc; 1982-03-31 to current/open; source msha-controller-operator-history