# Relationship history for MSHA mine 0505014

Current hierarchy: **Peter  Blake → Environmental Excavation LLC → Bear Ranch Gravel 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Environmental Excavation LLC → Bear Ranch Gravel Mine; 2013-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Peter  Blake → Bear Ranch Gravel Mine; 2013-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peter  Blake → Environmental Excavation LLC; 2013-03-08 to current/open; source msha-controller-operator-history