# Relationship history for MSHA mine 4000805

Current hierarchy: **Vulcan Materials Company → Vulcan Construction Materials, LLC → Monterey Sand 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

- **controller_controls_mine:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Monterey Sand LLC; 1950-01-01 to 2007-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Mc Dowell Materials Corp → Monterey Sand LLC; 1950-01-01 to 1985-12-01; source msha-controller-operator-history
- **controller_controls_mine:** Mc Dowell Enterprises → Monterey Sand LLC; 1950-01-01 to 1985-12-01; source msha-controller-operator-history
- **controller_controls_operator:** Mc Dowell Enterprises → Mc Dowell Materials Corp; 1950-01-01 to 1985-12-01; source msha-controller-operator-history
- **operator_operates_mine:** Highway Materials Inc → Monterey Sand LLC; 1985-12-02 to 2005-02-28; source msha-controller-operator-history
- **controller_controls_mine:** W Don  Dean → Monterey Sand LLC; 1985-12-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** W Don  Dean → Highway Materials Inc; 1985-12-02 to 2005-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Monterey Sand LLC → Monterey Sand LLC; 2005-03-01 to 2017-01-31; source msha-controller-operator-history
- **controller_controls_mine:** LoJac Holdings Corporation Inc → Monterey Sand LLC; 2005-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** LoJac Holdings Corporation Inc → Monterey Sand LLC; 2005-03-01 to 2017-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Vulcan Materials Company → Monterey Sand LLC; 2007-11-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Vulcan Construction Materials, LLC → Monterey Sand LLC; 2017-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vulcan Materials Company → Vulcan Construction Materials, LLC; 2017-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Construction Materials, LLC; 2017-02-01 to 2007-11-15; source msha-controller-operator-history