# Relationship history for MSHA mine 1900254

Current hierarchy: **Francis J  Triola → Concrete Service → BERLIN**

- 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:** E L Dauphinais Inc → BERLIN; 1950-01-01 to 1988-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Dauphinais Albert A Et Al → BERLIN; 1950-01-01 to 1988-09-15; source msha-controller-operator-history
- **controller_controls_operator:** Dauphinais Albert A Et Al → E L Dauphinais Inc; 1950-01-01 to 1988-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Egerton Inc → BERLIN; 1988-09-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Emaral Corp → BERLIN; 1988-09-16 to 1992-10-05; source msha-controller-operator-history
- **controller_controls_operator:** Egerton Inc → Emaral Corp; 1988-09-16 to 1992-10-05; source msha-controller-operator-history
- **operator_operates_mine:** Concrete Service → BERLIN; 1992-10-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Francis J  Triola → BERLIN; 1992-10-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Francis J  Triola → Concrete Service; 1992-10-06 to current/open; source msha-controller-operator-history