# Relationship history for MSHA mine 3003172

Current hierarchy: **William E  Threw → Bill Threw Inc → LEE PIT**

- 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:** William E  Threw → LEE PIT; 1990-09-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bill Threw Inc → LEE PIT; 1996-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William E  Threw → Bill Threw Inc; 1996-08-01 to current/open; source msha-controller-operator-history