# Relationship history for MSHA mine 4201959

Current hierarchy: **Brett  Emett; Carl  Bowler → Bowler & Emett Corp → BOWLER & EMETT CORP**

- 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:** Leavitt Construction → BOWLER & EMETT CORP; 1985-09-01 to 1995-11-27; source msha-controller-operator-history
- **controller_controls_mine:** Lemuel  Leavittt → BOWLER & EMETT CORP; 1985-09-01 to 1999-02-03; source msha-controller-operator-history
- **controller_controls_operator:** Lemuel  Leavittt → Leavitt Construction; 1985-09-01 to 1995-11-27; source msha-controller-operator-history
- **operator_operates_mine:** Bowler & Emett Corp → BOWLER & EMETT CORP; 1995-11-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Carl  Bowler  et al → BOWLER & EMETT CORP; 1995-11-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl  Bowler  et al → Bowler & Emett Corp; 1995-11-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brett  Emett  et al → Bowler & Emett Corp; 1995-11-28 to current/open; source msha-controller-operator-history