# Relationship history for MSHA mine 2501198

Current hierarchy: **Larry  Albenesius → A & A Sand & Excavating Inc → DREDGE #2**

- 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:** A & A Sand & Excavating Inc → DREDGE #2; 2000-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Albenesius → DREDGE #2; 2000-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Albenesius → A & A Sand & Excavating Inc; 2000-08-01 to current/open; source msha-controller-operator-history