# Relationship history for MSHA mine 3503338

Current hierarchy: **Nutter Ted & Jerry → Nutter Underground → NUTTER PORTABLE CRUSHER**

- 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:** Larson Inc → NUTTER PORTABLE CRUSHER; 1989-08-01 to 1997-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Larson Wendell E → NUTTER PORTABLE CRUSHER; 1989-08-01 to 1997-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Larson Wendell E → Larson Inc; 1989-08-01 to 1997-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Nutter Underground → NUTTER PORTABLE CRUSHER; 1997-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nutter Ted & Jerry → NUTTER PORTABLE CRUSHER; 1997-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nutter Ted & Jerry → Nutter Underground; 1997-08-01 to current/open; source msha-controller-operator-history