# Relationship history for MSHA mine 3503114

Current hierarchy: **Fish Dale → Fremont Construction Inc → Leavitt Or Leavitt Pit**

- 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:** Fremont Construction Inc → Leavitt Or Leavitt Pit; 1983-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fish Dale → Leavitt Or Leavitt Pit; 1983-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fish Dale → Fremont Construction Inc; 1983-08-01 to current/open; source msha-controller-operator-history