# Relationship history for MSHA mine 1302282

Current hierarchy: **Justin C  Higman; Joel D  Higman → NU Aggregates, LLC → Westfield 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:** NU Aggregates, LLC → Westfield Pit; 2004-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Justin C  Higman Et Al → Westfield Pit; 2004-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Justin C  Higman Et Al → NU Aggregates, LLC; 2004-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joel D  Higman Et Al → NU Aggregates, LLC; 2004-04-19 to current/open; source msha-controller-operator-history