# Relationship history for MSHA mine 2302606

Current hierarchy: **Greg  Booker; Elizabeth  Booker → MSG Meramec Sand & Gravel LLC → MSG**

- 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:** MSG Meramec Sand & Gravel LLC → MSG; 2026-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Greg  Booker et al → MSG; 2026-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Booker et al → MSG Meramec Sand & Gravel LLC; 2026-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Elizabeth  Booker et al → MSG Meramec Sand & Gravel LLC; 2026-06-22 to current/open; source msha-controller-operator-history