# Relationship history for MSHA mine 4609606

Current hierarchy: **Edward A  Asbury → Skyway Strip, Inc. → SHM-76**

- 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:** Edward A  Asbury → SHM-76; 2010-12-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Skyway Strip, Inc. → SHM-76; 2021-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward A  Asbury → Skyway Strip, Inc.; 2021-03-24 to current/open; source msha-controller-operator-history