# Relationship history for MSHA mine 4703234

Current hierarchy: **Lynda  Somers → Somers Aggregates Limited → CR-180**

- 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:** Lynda  Somers → CR-180; 1992-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Somers Aggregates Limited → CR-180; 2000-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lynda  Somers → Somers Aggregates Limited; 2000-03-01 to current/open; source msha-controller-operator-history