# Relationship history for MSHA mine 4300540

Current hierarchy: **Dave  Socinski → Double D Mining → Evergreen Quarry**

- 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:** Vermont Diamond Slate Inc → Evergreen Quarry; 1999-10-01 to 2004-08-31; source msha-controller-operator-history
- **controller_controls_mine:** John W  Andrushko → Evergreen Quarry; 1999-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John W  Andrushko → Vermont Diamond Slate Inc; 1999-10-01 to 2004-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Town Line Slate → Evergreen Quarry; 2004-09-01 to 2005-06-27; source msha-controller-operator-history
- **controller_controls_mine:** Richard P  Murray Jr → Evergreen Quarry; 2004-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard P  Murray Jr → Town Line Slate; 2004-09-01 to 2005-06-27; source msha-controller-operator-history
- **operator_operates_mine:** Andrushko Slate → Evergreen Quarry; 2005-06-28 to 2007-03-19; source msha-controller-operator-history
- **controller_controls_mine:** John W  Andrushko → Evergreen Quarry; 2005-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John W  Andrushko → Andrushko Slate; 2005-06-28 to 2007-03-19; source msha-controller-operator-history
- **controller_controls_mine:** Dave  Socinski → Evergreen Quarry; 2006-02-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Double D Mining → Evergreen Quarry; 2007-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dave  Socinski → Double D Mining; 2007-03-20 to current/open; source msha-controller-operator-history