# Relationship history for MSHA mine 2103344

Current hierarchy: **Brenda L  Flood → Concrete Mobility, LLC → Universal Crushing Spread**

- 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:** Flood Bros. Sand and Gravel → Universal Crushing Spread; 2003-03-27 to 2005-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Jeff D  Flood  et al → Universal Crushing Spread; 2003-03-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeff D  Flood  et al → Flood Bros. Sand and Gravel; 2003-03-27 to 2005-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Gary R  Flood  et al → Flood Bros. Sand and Gravel; 2003-03-27 to 2005-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Concrete Mobility, LLC → Universal Crushing Spread; 2005-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brenda L  Flood → Universal Crushing Spread; 2005-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brenda L  Flood → Concrete Mobility, LLC; 2005-11-01 to current/open; source msha-controller-operator-history