# Relationship history for MSHA mine 3003876

Current hierarchy: **Loretta J  Spezio → Elam Sand & Gravel → Kleeman MC110Z #K0040221**

- 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:** Joseph  Spezio → Kleeman MC110Z #K0040221; 1981-11-18 to 2013-05-05; source msha-controller-operator-history
- **operator_operates_mine:** Elam Sand & Gravel → Kleeman MC110Z #K0040221; 2013-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Spezio → Elam Sand & Gravel; 2013-04-23 to 2013-05-05; source msha-controller-operator-history
- **controller_controls_mine:** Loretta J  Spezio → Kleeman MC110Z #K0040221; 2013-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Loretta J  Spezio → Elam Sand & Gravel; 2013-05-06 to current/open; source msha-controller-operator-history