# Relationship history for MSHA mine 2302288

Current hierarchy: **The Edwin B Keevan Jr Revocable Trust; C Scott  Hiebert → Old Monroe Sand & Gravel  LLC → Old Monroe Sand Gravel 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Old Monroe Sand & Gravel  LLC → Old Monroe Sand Gravel LLC; 2003-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** The Edwin B Keevan Jr Revocable Trust et al → Old Monroe Sand Gravel LLC; 2003-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** The Edwin B Keevan Jr Revocable Trust et al → Old Monroe Sand & Gravel  LLC; 2003-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** C Scott  Hiebert et al → Old Monroe Sand & Gravel  LLC; 2003-11-18 to current/open; source msha-controller-operator-history