# Relationship history for MSHA mine 1302157

Current hierarchy: **Greg  Bruening → Bruening Rock Products Inc → PLANT NO 7**

- 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:** Greg  Bruening → PLANT NO 7; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wiltgen Construction Company → PLANT NO 7; 1988-07-01 to 2018-04-17; source msha-controller-operator-history
- **controller_controls_mine:** Chad J  Wiltgen et al → PLANT NO 7; 1988-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chad J  Wiltgen et al → Wiltgen Construction Company; 1988-07-01 to 2018-04-17; source msha-controller-operator-history
- **controller_controls_operator:** Chris J  Wiltgen et al → Wiltgen Construction Company; 1988-07-01 to 2018-04-17; source msha-controller-operator-history
- **operator_operates_mine:** Bruening Rock Products Inc → PLANT NO 7; 2018-04-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Bruening → Bruening Rock Products Inc; 2018-04-18 to current/open; source msha-controller-operator-history