# Relationship history for MSHA mine 2200757

Current hierarchy: **James R  Arnold → Gravel Hill Construction Corp → Perry 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Gravel Hill Construction Corp → Perry Mine; 2004-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James R  Arnold → Perry Mine; 2004-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James R  Arnold → Gravel Hill Construction Corp; 2004-04-07 to current/open; source msha-controller-operator-history