# Relationship history for MSHA mine 0504452

Current hierarchy: **Oxbow Carbon LLC → Oxbow Mining, LLC → Sanborn Creek Mine**

- 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:** Oxbow Carbon LLC → Sanborn Creek Mine; 1989-07-14 to 1995-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Somerset Mining Company → Sanborn Creek Mine; 1991-01-01 to 1995-09-14; source msha-controller-operator-history
- **controller_controls_operator:** Oxbow Carbon LLC → Somerset Mining Company; 1991-01-01 to 1995-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Oxbow Mining, LLC → Sanborn Creek Mine; 1995-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Oxbow Carbon LLC → Sanborn Creek Mine; 1995-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Oxbow Carbon LLC → Oxbow Mining, LLC; 1995-09-15 to current/open; source msha-controller-operator-history