# Relationship history for MSHA mine 4801568

Current hierarchy: **Lorinda M  Hale → Alexander Construction Company → Alexander Construction**

- 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:** Alexander Construction Company → Alexander Construction; 1999-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lorinda M  Hale → Alexander Construction; 1999-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lorinda M  Hale → Alexander Construction Company; 1999-08-01 to current/open; source msha-controller-operator-history