# Relationship history for MSHA mine 2902081

Current hierarchy: **Cecil  Henry → Fesco Inc → AZTEC AGGREGATE**

- 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:** Cecil  Henry → AZTEC AGGREGATE; 1991-07-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fesco Inc → AZTEC AGGREGATE; 1992-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cecil  Henry → Fesco Inc; 1992-02-01 to current/open; source msha-controller-operator-history