# Relationship history for MSHA mine 0503145

Current hierarchy: **Nauta Charles → Nauta → Nauta Ii**

- 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:** Larimer County-Co → Nauta Ii; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Larimer County Road & Bridge Department → Nauta Ii; 1978-03-09 to 1985-02-06; source msha-controller-operator-history
- **controller_controls_operator:** Larimer County-Co → Larimer County Road & Bridge Department; 1978-03-09 to 1985-02-06; source msha-controller-operator-history
- **operator_operates_mine:** Nauta → Nauta Ii; 1985-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nauta Charles → Nauta Ii; 1985-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nauta Charles → Nauta; 1985-02-07 to current/open; source msha-controller-operator-history