# Relationship history for MSHA mine 4503677

Current hierarchy: **Marvin D  Donovan Sr; Marvin D  Donovan Jr → Rockport Quarry LLC → Rockport Quarry LLC**

- 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:** Rockport Quarry, LLC → Rockport Quarry LLC; 2010-01-27 to 2012-07-26; source msha-controller-operator-history
- **controller_controls_mine:** Marvin D  Donovan Sr et al → Rockport Quarry LLC; 2010-01-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marvin D  Donovan Sr et al → Rockport Quarry, LLC; 2010-01-27 to 2012-07-26; source msha-controller-operator-history
- **controller_controls_operator:** Marvin D  Donovan Jr et al → Rockport Quarry, LLC; 2010-01-27 to 2012-07-26; source msha-controller-operator-history
- **operator_operates_mine:** Andrews Landshapers → Rockport Quarry LLC; 2012-07-27 to 2013-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Andrew  Damerau → Rockport Quarry LLC; 2012-07-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Andrew  Damerau → Andrews Landshapers; 2012-07-27 to 2013-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Rockport Quarry LLC → Rockport Quarry LLC; 2013-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marvin D  Donovan Jr et al → Rockport Quarry LLC; 2013-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marvin D  Donovan Sr et al → Rockport Quarry LLC; 2013-11-01 to current/open; source msha-controller-operator-history