# Relationship history for MSHA mine 0801363

Current hierarchy: **William L  McDaniel → Big Island Excavating Inc → Bell Blvd Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** William L  McDaniel → Bell Blvd Mine; 2001-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Big Island Excavating Inc → Bell Blvd Mine; 2008-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William L  McDaniel → Big Island Excavating Inc; 2008-04-01 to current/open; source msha-controller-operator-history