# Relationship history for MSHA mine 4503397

Current hierarchy: **Justin R  Bruch; Joel A  Bruch; Chelsey D  Pruss → Bruch & Bruch Construction Inc → NORTH QUARRY**

- 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:** Jennifer  Bruch → NORTH QUARRY; 1986-04-01 to 2022-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Bruch & Bruch Construction Inc → NORTH QUARRY; 1999-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jennifer  Bruch → Bruch & Bruch Construction Inc; 1999-05-01 to 2022-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Joel A  Bruch et al → NORTH QUARRY; 2022-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joel A  Bruch et al → Bruch & Bruch Construction Inc; 2022-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Justin R  Bruch et al → Bruch & Bruch Construction Inc; 2022-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chelsey D  Pruss et al → Bruch & Bruch Construction Inc; 2022-10-01 to current/open; source msha-controller-operator-history