# Relationship history for MSHA mine 2800717

Current hierarchy: **David C  Denise → Phoenix Pinelands Corporation → Cedar Bridge Sand Operation**

- 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:** Lentine Materials → Cedar Bridge Sand Operation; 1950-01-01 to 1997-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Frank M  Lentine et al → Cedar Bridge Sand Operation; 1950-01-01 to 1997-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Frank M  Lentine et al → Lentine Materials; 1950-01-01 to 1997-03-31; source msha-controller-operator-history
- **controller_controls_mine:** David C  Denise → Cedar Bridge Sand Operation; 1993-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Christine H  Yackman → Cedar Bridge Sand Operation; 1996-08-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pinnacle Materials Inc → Cedar Bridge Sand Operation; 1997-04-01 to 2006-10-17; source msha-controller-operator-history
- **controller_controls_operator:** Christine H  Yackman → Pinnacle Materials Inc; 1997-04-01 to 2006-10-17; source msha-controller-operator-history
- **controller_controls_mine:** US Concrete → Cedar Bridge Sand Operation; 2002-02-01 to 2021-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Eastern Concrete Materials Inc → Cedar Bridge Sand Operation; 2006-10-18 to 2019-10-16; source msha-controller-operator-history
- **controller_controls_operator:** US Concrete → Eastern Concrete Materials Inc; 2006-10-18 to 2019-10-16; source msha-controller-operator-history
- **operator_operates_mine:** Phoenix Pinelands Corporation → Cedar Bridge Sand Operation; 2019-10-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David C  Denise → Phoenix Pinelands Corporation; 2019-10-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Cedar Bridge Sand Operation; 2022-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Eastern Concrete Materials Inc; 2022-01-01 to 2019-10-16; source msha-controller-operator-history