# Relationship history for MSHA mine 4501304

Current hierarchy: **Nicholas L  Seegert Sr → Seegert Construction Inc → Erling 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:** M & C Rock Products Inc → Erling Pit; 1950-01-01 to 1980-03-17; source msha-controller-operator-history
- **controller_controls_mine:** Mc Grath John → Erling Pit; 1950-01-01 to 1980-03-17; source msha-controller-operator-history
- **controller_controls_operator:** Mc Grath John → M & C Rock Products Inc; 1950-01-01 to 1980-03-17; source msha-controller-operator-history
- **operator_operates_mine:** Seegert Construction Inc → Erling Pit; 1980-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nicholas L  Seegert Sr → Erling Pit; 1980-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nicholas L  Seegert Sr → Seegert Construction Inc; 1980-03-18 to current/open; source msha-controller-operator-history