# Relationship history for MSHA mine 4609480

Current hierarchy: **Edward A  Asbury → Skyway Strip, Inc. → Skyway III 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

- **controller_controls_mine:** Edward A  Asbury → Skyway III Mine; 2010-12-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Edward A  Asbury → Skyway III Mine; 2011-01-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Southern Minerals, Inc. → Skyway III Mine; 2013-07-08 to 2013-09-20; source msha-controller-operator-history
- **controller_controls_operator:** Edward A  Asbury → Southern Minerals, Inc.; 2013-07-08 to 2013-09-20; source msha-controller-operator-history
- **operator_operates_mine:** Skyway Strip, Inc. → Skyway III Mine; 2013-09-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward A  Asbury → Skyway Strip, Inc.; 2013-09-21 to current/open; source msha-controller-operator-history