# Relationship history for MSHA mine 4105053

Current hierarchy: **Tallian  Thompson → Hornet Services LLc → Portable #4**

- 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:** Andrew  Bartlett → Portable #4; 2013-07-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bartlett Construction → Portable #4; 2014-02-12 to 2014-09-23; source msha-controller-operator-history
- **controller_controls_operator:** Andrew  Bartlett → Bartlett Construction; 2014-02-12 to 2014-09-23; source msha-controller-operator-history
- **controller_controls_mine:** Tallian  Thompson → Portable #4; 2014-08-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hornet Services LLc → Portable #4; 2014-09-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tallian  Thompson → Hornet Services LLc; 2014-09-24 to current/open; source msha-controller-operator-history