# Relationship history for MSHA mine 0203008

Current hierarchy: **Julie A Chaffin → Damavand Trading LLC → Rio Grande Material West**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Mary E  Guthrie → Rio Grande Material West; 2002-02-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** TRP LLC → Rio Grande Material West; 2002-12-03 to 2007-12-20; source msha-controller-operator-history
- **controller_controls_operator:** Mary E  Guthrie → TRP LLC; 2002-12-03 to 2007-12-20; source msha-controller-operator-history
- **controller_controls_mine:** Julie A Chaffin et al → Rio Grande Material West; 2005-04-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Damavand Trading LLC → Rio Grande Material West; 2007-12-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Julie A Chaffin et al → Damavand Trading LLC; 2007-12-21 to current/open; source msha-controller-operator-history