# Relationship history for MSHA mine 3304630

Current hierarchy: **Jeffrey R  Sidwell → Sidwell Materials → Blaine Aggregates**

- 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:** Lee  Conway et al → Blaine Aggregates; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeffrey R  Sidwell → Blaine Aggregates; 1996-02-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bennoc Inc → Blaine Aggregates; 2009-04-07 to 2010-03-14; source msha-controller-operator-history
- **controller_controls_operator:** Lee  Conway et al → Bennoc Inc; 2009-04-07 to 2010-03-14; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Conway et al → Bennoc Inc; 2009-04-07 to 2010-03-14; source msha-controller-operator-history
- **operator_operates_mine:** Sidwell Materials → Blaine Aggregates; 2010-03-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey R  Sidwell → Sidwell Materials; 2010-03-15 to current/open; source msha-controller-operator-history