# Relationship history for MSHA mine 2302333

Current hierarchy: **Tim  Duncan → All American Materials → Conner Quarries**

- 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:** Tim  Duncan → Conner Quarries; 2001-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lake Ozark Sand & Gravel → Conner Quarries; 2006-04-21 to 2007-06-05; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Duncan → Lake Ozark Sand & Gravel; 2006-04-21 to 2007-06-05; source msha-controller-operator-history
- **operator_operates_mine:** All American Materials LLC → Conner Quarries; 2007-06-06 to 2008-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Brad  Napier  et al → Conner Quarries; 2007-06-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brad  Napier  et al → All American Materials LLC; 2007-06-06 to 2008-04-06; source msha-controller-operator-history
- **controller_controls_operator:** Gina L  Napier  et al → All American Materials LLC; 2007-06-06 to 2008-04-06; source msha-controller-operator-history
- **operator_operates_mine:** All American Materials → Conner Quarries; 2008-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Duncan → All American Materials; 2008-04-07 to current/open; source msha-controller-operator-history