# Relationship history for MSHA mine 2902352

Current hierarchy: **Joe W  Jackson; Mike H  Jackson → Deming Sand & Gravel Inc → Florida Mine**

- 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:** Joe W  Jackson  et al → Florida Mine; 2003-04-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Deming Sand & Gravel Inc → Florida Mine; 2007-12-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe W  Jackson  et al → Deming Sand & Gravel Inc; 2007-12-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike H  Jackson  et al → Deming Sand & Gravel Inc; 2007-12-08 to current/open; source msha-controller-operator-history