# Relationship history for MSHA mine 3503819

Current hierarchy: **Charles Ray  Briscoe → Last Chance Ranch → LCR**

- 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:** Last Chance Ranch → LCR; 2014-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles Ray  Briscoe → LCR; 2014-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles Ray  Briscoe → Last Chance Ranch; 2014-07-23 to current/open; source msha-controller-operator-history