# Relationship history for MSHA mine 4104181

Current hierarchy: **John M  Pitts → E & A Materials Inc → E & A BOWIE PLANT**

- 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:** John M  Pitts  et al → E & A BOWIE PLANT; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** E & A Materials Inc → E & A BOWIE PLANT; 2000-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John M  Pitts  et al → E & A Materials Inc; 2000-06-01 to current/open; source msha-controller-operator-history