# Relationship history for MSHA mine 2200543

Current hierarchy: **William E Bowen → Perry County Sand & Gravel Inc → BOWEN PIT #1**

- 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:** Gene A  Cochran → BOWEN PIT #1; 1950-01-01 to 1989-10-02; source msha-controller-operator-history
- **operator_operates_mine:** South Mississippi Sand & Gravel Company Inc → BOWEN PIT #1; 1981-11-01 to 1989-10-02; source msha-controller-operator-history
- **controller_controls_operator:** Gene A  Cochran → South Mississippi Sand & Gravel Company Inc; 1981-11-01 to 1989-10-02; source msha-controller-operator-history
- **operator_operates_mine:** Concrete Material & Supply Company → BOWEN PIT #1; 1989-10-03 to 1990-03-05; source msha-controller-operator-history
- **controller_controls_mine:** James C  Sykes → BOWEN PIT #1; 1989-10-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James C  Sykes → Concrete Material & Supply Company; 1989-10-03 to 1990-03-05; source msha-controller-operator-history
- **operator_operates_mine:** Perry County Sand & Gravel Inc → BOWEN PIT #1; 1990-03-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William E Bowen → BOWEN PIT #1; 1990-03-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William E Bowen → Perry County Sand & Gravel Inc; 1990-03-06 to current/open; source msha-controller-operator-history