# Relationship history for MSHA mine 4405035

Current hierarchy: **Billiter Jim → Hard Times Mining Inc → No 1**

- 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:** United  Company → No 1; 1973-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wellmore Coal Corp No 6 → No 1; 1978-05-01 to 1979-02-04; source msha-controller-operator-history
- **controller_controls_operator:** United  Company → Wellmore Coal Corp No 6; 1978-05-01 to 1979-02-04; source msha-controller-operator-history
- **operator_operates_mine:** Hard Times Mining Inc → No 1; 1979-02-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Billiter Jim → No 1; 1979-02-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Billiter Jim → Hard Times Mining Inc; 1979-02-05 to current/open; source msha-controller-operator-history