# Relationship history for MSHA mine 3304328

Current hierarchy: **Ted  Sohnen → ETTA MAE, Inc. → Sherritts Mine**

- 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:** ETTA MAE, Inc. → Sherritts Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shepherd Lawrence → Sherritts Mine; 1950-01-01 to 2009-03-11; source msha-controller-operator-history
- **controller_controls_operator:** Shepherd Lawrence → ETTA MAE, Inc.; 1950-01-01 to 2009-03-11; source msha-controller-operator-history
- **controller_controls_mine:** Ted  Sohnen → Sherritts Mine; 2009-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ted  Sohnen → ETTA MAE, Inc.; 2009-03-12 to current/open; source msha-controller-operator-history