# Relationship history for MSHA mine 5001401

Current hierarchy: **Footh Douglas → Cdc Partners → Summit 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

- **controller_controls_mine:** Meadowlark Mining Company → Summit Mine; 1980-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Meadowlark Mining Company → Summit Mine; 1981-06-01 to 1982-02-07; source msha-controller-operator-history
- **controller_controls_operator:** Meadowlark Mining Company → Meadowlark Mining Company; 1981-06-01 to 1982-02-07; source msha-controller-operator-history
- **operator_operates_mine:** Cdc Partners → Summit Mine; 1982-02-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Footh Douglas → Summit Mine; 1982-02-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Footh Douglas → Cdc Partners; 1982-02-08 to current/open; source msha-controller-operator-history