# Relationship history for MSHA mine 4702876

Current hierarchy: **John E.  Fitzgerald → J.F. Construction Inc. → JF Construction Inc**

- 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:** Fitzgerald Construction Company → JF Construction Inc; 1988-06-01 to 2023-08-28; source msha-controller-operator-history
- **controller_controls_mine:** Fitzgerald John → JF Construction Inc; 1988-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fitzgerald John → Fitzgerald Construction Company; 1988-06-01 to 2023-08-28; source msha-controller-operator-history
- **operator_operates_mine:** J.F. Construction Inc. → JF Construction Inc; 2023-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John E.  Fitzgerald → JF Construction Inc; 2023-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John E.  Fitzgerald → J.F. Construction Inc.; 2023-08-29 to current/open; source msha-controller-operator-history