# Relationship history for MSHA mine 4300705

Current hierarchy: **Scott D  Ireland → S.D. Ireland Brothers Corporation → Vermont Aggregates, 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Scott D  Ireland → Vermont Aggregates, LLC; 1986-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** S.D. Ireland Brothers Corporation → Vermont Aggregates, LLC; 2009-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott D  Ireland → S.D. Ireland Brothers Corporation; 2009-06-23 to current/open; source msha-controller-operator-history