# Relationship history for MSHA mine 4801717

Current hierarchy: **Howard Brent Lee → H. B. Lee Construction Co., Inc. → 2001 BL Pegson Crusher**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** H. B. Lee Construction Co., Inc. → 2001 BL Pegson Crusher; 2007-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Howard Brent Lee → 2001 BL Pegson Crusher; 2007-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Howard Brent Lee → H. B. Lee Construction Co., Inc.; 2007-07-01 to current/open; source msha-controller-operator-history