# Relationship history for MSHA mine 2401819

Current hierarchy: **Ballard Al → Special Lady Mining Corp → St Joe Placer 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:** Ballard Al → St Joe Placer Mine; 1985-06-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Special Lady Mining Corp → St Joe Placer Mine; 1986-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ballard Al → Special Lady Mining Corp; 1986-04-01 to current/open; source msha-controller-operator-history