# Relationship history for MSHA mine 1001700

Current hierarchy: **Charles M Horrocks → Pocatello Ready Mix → Horrocks Ready**

- 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:** Pocatello Ready Mix → Horrocks Ready; 1985-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles M Horrocks → Horrocks Ready; 1985-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles M Horrocks → Pocatello Ready Mix; 1985-10-01 to current/open; source msha-controller-operator-history