# Relationship history for MSHA mine 2200684

Current hierarchy: **William E Bowen → Perry County Sand & Gravel Inc → COOK PIT #2**

- 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 Bowen → COOK PIT #2; 1990-03-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Perry County Sand & Gravel Inc → COOK PIT #2; 1996-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William E Bowen → Perry County Sand & Gravel Inc; 1996-10-01 to current/open; source msha-controller-operator-history