# Relationship history for MSHA mine 5100235

Current hierarchy: **Chris  Harlan → Big Island Concrete & Aggregate → Big Island Concrete & Aggregate**

- 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:** Kona Cinder & Soil Inc → Big Island Concrete & Aggregate; 2001-04-01 to 2007-09-04; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Harlan → Big Island Concrete & Aggregate; 2001-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Harlan → Kona Cinder & Soil Inc; 2001-04-01 to 2007-09-04; source msha-controller-operator-history
- **operator_operates_mine:** Big Island Concrete & Aggregate → Big Island Concrete & Aggregate; 2007-09-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chris  Harlan  et al → Big Island Concrete & Aggregate; 2007-09-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chris  Harlan  et al → Big Island Concrete & Aggregate; 2007-09-05 to current/open; source msha-controller-operator-history