# Relationship history for MSHA mine 1516442

Current hierarchy: **Dalton Marion Jr → New Generation Contracting Inc → New Generation Mine No 1**

- 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:** Adco Inc → New Generation Mine No 1; 1988-08-01 to 1989-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Adams Larry Jack → New Generation Mine No 1; 1988-08-01 to 1989-01-02; source msha-controller-operator-history
- **controller_controls_operator:** Adams Larry Jack → Adco Inc; 1988-08-01 to 1989-01-02; source msha-controller-operator-history
- **operator_operates_mine:** New Generation Contracting Inc → New Generation Mine No 1; 1989-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dalton Marion Jr → New Generation Mine No 1; 1989-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dalton Marion Jr → New Generation Contracting Inc; 1989-01-03 to current/open; source msha-controller-operator-history