# Relationship history for MSHA mine 3002503

Current hierarchy: **Howard J  LaFever → La Fever Excavating Inc → Dewitt Gravel Bank**

- 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:** Town Of Delhi Highway Department → Dewitt Gravel Bank; 1980-03-01 to 1981-10-18; source msha-controller-operator-history
- **controller_controls_mine:** Town Of Delhi - NY → Dewitt Gravel Bank; 1980-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Town Of Delhi - NY → Town Of Delhi Highway Department; 1980-03-01 to 1981-10-18; source msha-controller-operator-history
- **controller_controls_mine:** Howard J  LaFever → Dewitt Gravel Bank; 1981-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** La Fever Excavating Inc → Dewitt Gravel Bank; 1981-10-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Howard J  LaFever → La Fever Excavating Inc; 1981-10-19 to current/open; source msha-controller-operator-history