# Relationship history for MSHA mine 3610119

Current hierarchy: **William G  Albert → BILL ALBERT EXCAVATING → BILL ALBERT EXCAVATING**

- 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:** Daniel Albert Excavating → BILL ALBERT EXCAVATING; 2014-10-08 to 2018-10-16; source msha-controller-operator-history
- **controller_controls_mine:** Daniel D  Albert → BILL ALBERT EXCAVATING; 2014-10-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel D  Albert → Daniel Albert Excavating; 2014-10-08 to 2018-10-16; source msha-controller-operator-history
- **operator_operates_mine:** BILL ALBERT EXCAVATING → BILL ALBERT EXCAVATING; 2018-10-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William G  Albert → BILL ALBERT EXCAVATING; 2018-10-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William G  Albert → BILL ALBERT EXCAVATING; 2018-10-17 to current/open; source msha-controller-operator-history