# Relationship history for MSHA mine 3609753

Current hierarchy: **Enrique E  Vasquez → Enrique Vasquez → Vasquez Contractor**

- 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:** Enrique E  Vasquez et al → Vasquez Contractor; 2008-05-06 to 2010-10-07; source msha-controller-operator-history
- **operator_operates_mine:** Vasquez Stone → Vasquez Contractor; 2009-05-12 to 2010-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Enrique E  Vasquez et al → Vasquez Stone; 2009-05-12 to 2010-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Mario B  Vasquez et al → Vasquez Stone; 2009-05-12 to 2010-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Vasquez Stone → Vasquez Contractor; 2010-04-01 to 2012-04-26; source msha-controller-operator-history
- **controller_controls_mine:** Mario B  Vasquez et al → Vasquez Contractor; 2010-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mario B  Vasquez et al → Vasquez Stone; 2010-04-01 to 2012-04-26; source msha-controller-operator-history
- **controller_controls_operator:** Enrique E  Vasquez et al → Vasquez Stone; 2010-04-01 to 2012-04-26; source msha-controller-operator-history
- **controller_controls_mine:** Enrique E  Vasquez → Vasquez Contractor; 2010-10-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Enrique E  Vasquez → Vasquez Stone; 2010-10-08 to 2010-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Enrique Vasquez → Vasquez Contractor; 2012-04-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Enrique E  Vasquez → Vasquez Contractor; 2012-04-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Enrique E  Vasquez → Enrique Vasquez; 2012-04-27 to current/open; source msha-controller-operator-history