# Relationship history for MSHA mine 4102774

Current hierarchy: **Guidry Patrick → Baytown Sand & Clay → Sand Pit No 2**

- 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:** Guidry Patrick → Sand Pit No 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Baytown Sand & Clay → Sand Pit No 2; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Guidry Patrick → Baytown Sand & Clay; 1978-03-09 to current/open; source msha-controller-operator-history