# Relationship history for MSHA mine 2901943

Current hierarchy: **J W  Jones → J W Jones Construction Company → Crusher Nos 802 814 817 828**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** J W  Jones → Crusher Nos 802 814 817 828; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J W Jones Construction Company → Crusher Nos 802 814 817 828; 1983-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J W  Jones → J W Jones Construction Company; 1983-10-01 to current/open; source msha-controller-operator-history