# Relationship history for MSHA mine 2102720

Current hierarchy: **Steve  Minnerath → Starry Construction Company Inc → PORTABLE CRUSHER #544**

- 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:** Myrtle A  Starry → PORTABLE CRUSHER #544; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Starry Construction Company Inc → PORTABLE CRUSHER #544; 1979-01-01 to 1982-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Myrtle A  Starry → Starry Construction Company Inc; 1979-01-01 to 1982-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Starry Construction Company Inc → PORTABLE CRUSHER #544; 1982-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Minnerath → PORTABLE CRUSHER #544; 1982-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Minnerath → Starry Construction Company Inc; 1982-02-01 to current/open; source msha-controller-operator-history