# Relationship history for MSHA mine 4001732

Current hierarchy: **Twinkie Mining Company → Twinkie Mining Company → Twinkie No 2 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:** Kidd Coal Company → Twinkie No 2 Mine; 1975-01-01 to 1975-07-06; source msha-controller-operator-history
- **controller_controls_mine:** Kidd Coal Company → Twinkie No 2 Mine; 1975-01-01 to 1975-07-06; source msha-controller-operator-history
- **controller_controls_operator:** Kidd Coal Company → Kidd Coal Company; 1975-01-01 to 1975-07-06; source msha-controller-operator-history
- **operator_operates_mine:** Twinkie Mining Company → Twinkie No 2 Mine; 1975-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Twinkie Mining Company → Twinkie No 2 Mine; 1975-07-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Twinkie Mining Company → Twinkie Mining Company; 1975-07-07 to current/open; source msha-controller-operator-history