# Relationship history for MSHA mine 2700268

Current hierarchy: **Danielle  Edwards Shannon → Glen Aggregates LLC → Glen 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

- **operator_operates_mine:** Glen Sand & Gravel Corp → Glen Aggregates LLC; 1987-04-01 to 2018-03-22; source msha-controller-operator-history
- **controller_controls_mine:** Robert F  Holmes → Glen Aggregates LLC; 1987-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert F  Holmes → Glen Sand & Gravel Corp; 1987-04-01 to 2018-03-22; source msha-controller-operator-history
- **operator_operates_mine:** Glen Aggregates LLC → Glen Aggregates LLC; 2018-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Danielle  Edwards Shannon → Glen Aggregates LLC; 2018-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Danielle  Edwards Shannon → Glen Aggregates LLC; 2018-03-23 to current/open; source msha-controller-operator-history