# Relationship history for MSHA mine 3503691

Current hierarchy: **Jerome J  Collman → RD MAC INC → Grey Eagle**

- 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:** Jerome J  Collman → Grey Eagle; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tony  Britt → Grey Eagle; 1998-03-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Britt Sand & Gravel → Grey Eagle; 2008-06-24 to 2020-05-14; source msha-controller-operator-history
- **controller_controls_operator:** Tony  Britt → Britt Sand & Gravel; 2008-06-24 to 2020-05-14; source msha-controller-operator-history
- **operator_operates_mine:** RD MAC INC → Grey Eagle; 2020-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerome J  Collman → RD MAC INC; 2020-05-15 to current/open; source msha-controller-operator-history