# Relationship history for MSHA mine 4102256

Current hierarchy: **Dennis J  Landry → Rose City Sand → Rose City Sand**

- 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:** Rose City Sand Corporation → Rose City Sand; 1950-01-01 to 2008-03-17; source msha-controller-operator-history
- **controller_controls_mine:** Jack G  Huebner → Rose City Sand; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack G  Huebner → Rose City Sand Corporation; 1950-01-01 to 2008-03-17; source msha-controller-operator-history
- **operator_operates_mine:** Rose City Sand → Rose City Sand; 2008-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dennis J  Landry → Rose City Sand; 2008-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis J  Landry → Rose City Sand; 2008-03-18 to current/open; source msha-controller-operator-history