# Relationship history for MSHA mine 0800958

Current hierarchy: **Michael  Hollingshead → SRM Materials → SRM Materials Punta Gorda**

- 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:** Coral Rock Inc → SRM Materials Punta Gorda; 1980-05-01 to 1987-12-27; source msha-controller-operator-history
- **controller_controls_mine:** Donald R Justice Corp → SRM Materials Punta Gorda; 1980-05-01 to 1987-12-27; source msha-controller-operator-history
- **controller_controls_operator:** Donald R Justice Corp → Coral Rock Inc; 1980-05-01 to 1987-12-27; source msha-controller-operator-history
- **operator_operates_mine:** Coral Rock Inc → SRM Materials Punta Gorda; 1987-12-28 to 1999-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Edward C  Levy Jr et al → SRM Materials Punta Gorda; 1987-12-28 to 1999-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Edward C  Levy Jr et al → Coral Rock Inc; 1987-12-28 to 1999-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Florida CRI Inc → SRM Materials Punta Gorda; 1999-03-01 to 2015-06-11; source msha-controller-operator-history
- **controller_controls_mine:** Joseph D  Bonness III et al → SRM Materials Punta Gorda; 1999-03-01 to 2015-04-15; source msha-controller-operator-history
- **controller_controls_operator:** Joseph D  Bonness III et al → Florida CRI Inc; 1999-03-01 to 2015-04-15; source msha-controller-operator-history
- **controller_controls_mine:** Gerald  Hickman → SRM Materials Punta Gorda; 2011-11-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Hollingshead et al → SRM Materials Punta Gorda; 2013-12-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joseph D  Bonness III → SRM Materials Punta Gorda; 2015-04-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph D  Bonness III → Florida CRI Inc; 2015-04-16 to 2015-06-11; source msha-controller-operator-history
- **operator_operates_mine:** Magnum Materials LLC → SRM Materials Punta Gorda; 2015-06-12 to 2023-08-08; source msha-controller-operator-history
- **controller_controls_operator:** Gerald  Hickman → Magnum Materials LLC; 2015-06-12 to 2023-08-08; source msha-controller-operator-history
- **operator_operates_mine:** SRM Materials → SRM Materials Punta Gorda; 2023-08-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Hollingshead et al → SRM Materials; 2023-08-09 to current/open; source msha-controller-operator-history