# Relationship history for MSHA mine 2103816

Current hierarchy: **William John  Bongers; Jayne Kathryn  Bongers → ABR Sand and Gravel LLC → Pit No. 1**

- 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:** ABR Sand and Gravel LLC → Pit No. 1; 2014-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William John  Bongers et al → Pit No. 1; 2014-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William John  Bongers et al → ABR Sand and Gravel LLC; 2014-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jayne Kathryn  Bongers et al → ABR Sand and Gravel LLC; 2014-04-02 to current/open; source msha-controller-operator-history