# Relationship history for MSHA mine 4105023

Current hierarchy: **Moriah TFS Holdings LLC → Thompson Materials → Bar M**

- 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

- **operator_operates_mine:** Bartlett Construction → Bar M; 2013-07-15 to 2014-09-07; source msha-controller-operator-history
- **controller_controls_mine:** Andrew  Bartlett → Bar M; 2013-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Andrew  Bartlett → Bartlett Construction; 2013-07-15 to 2014-09-07; source msha-controller-operator-history
- **controller_controls_mine:** Tallian  Thompson → Bar M; 2014-08-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Thompson Field Services → Bar M; 2014-09-08 to 2020-02-01; source msha-controller-operator-history
- **controller_controls_operator:** Tallian  Thompson → Thompson Field Services; 2014-09-08 to 2020-02-01; source msha-controller-operator-history
- **operator_operates_mine:** Thompson Materials → Bar M; 2020-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Moriah TFS Holdings LLC → Bar M; 2020-02-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Moriah TFS Holdings LLC → Thompson Materials; 2020-02-20 to current/open; source msha-controller-operator-history