# Relationship history for MSHA mine 2800716

Current hierarchy: **David C  Denise → Phoenix Pinelands Corp → PHOENIX PINELANDS**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Mount Holly Concrete → PHOENIX PINELANDS; 1950-01-01 to 1989-01-17; source msha-controller-operator-history
- **controller_controls_mine:** Joseph C Namura → PHOENIX PINELANDS; 1950-01-01 to 1989-01-17; source msha-controller-operator-history
- **controller_controls_operator:** Joseph C Namura → Mount Holly Concrete; 1950-01-01 to 1989-01-17; source msha-controller-operator-history
- **operator_operates_mine:** Pineland Materials Inc → PHOENIX PINELANDS; 1989-01-18 to 1993-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Howard S  Heydon Jr → PHOENIX PINELANDS; 1989-01-18 to 1993-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Howard S  Heydon Jr → Pineland Materials Inc; 1989-01-18 to 1993-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Phoenix Pinelands Corp → PHOENIX PINELANDS; 1993-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David C  Denise → PHOENIX PINELANDS; 1993-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David C  Denise → Phoenix Pinelands Corp; 1993-11-01 to current/open; source msha-controller-operator-history