# Relationship history for MSHA mine 2901716

Current hierarchy: **J W  Jones → J W Jones Construction Company → Pit 77-1-F**

- 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:** J W  Jones → Pit 77-1-F; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J W Jones Construction Company → Pit 77-1-F; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J W  Jones → J W Jones Construction Company; 1978-03-09 to current/open; source msha-controller-operator-history