# Relationship history for MSHA mine 4503570

Current hierarchy: **Justin R  Bruch; Joel A  Bruch; Chelsey D  Pruss → JJC Resources, LLC → Black Diamond 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

- **operator_operates_mine:** D. Holcomb & Co. → Black Diamond Quarry; 2004-10-04 to 2017-06-29; source msha-controller-operator-history
- **controller_controls_mine:** Dennis  Holcomb → Black Diamond Quarry; 2004-10-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Holcomb → D. Holcomb & Co.; 2004-10-04 to 2017-06-29; source msha-controller-operator-history
- **operator_operates_mine:** JJC Resources, LLC → Black Diamond Quarry; 2017-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Justin R  Bruch et al → Black Diamond Quarry; 2017-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Justin R  Bruch et al → JJC Resources, LLC; 2017-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joel A  Bruch et al → JJC Resources, LLC; 2017-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chelsey D  Pruss et al → JJC Resources, LLC; 2017-06-30 to current/open; source msha-controller-operator-history