# Relationship history for MSHA mine 4801327

Current hierarchy: **Dana L  Sims → Brasel & Sims Construction Company → Crusher No 2**

- 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:** Dana L  Sims → Crusher No 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Brasel & Sims Construction Company → Crusher No 2; 1980-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dana L  Sims → Brasel & Sims Construction Company; 1980-06-01 to current/open; source msha-controller-operator-history