# Relationship history for MSHA mine 1519192

Current hierarchy: **Larry  Stacy; William  Stacy → Blue Sky Excavating, LLC → Mine #1**

- 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:** Stacy Brothers Mining, Inc. → Mine #1; 2008-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William  Stacy et al → Mine #1; 2008-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Stacy et al → Stacy Brothers Mining, Inc.; 2008-02-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Stacy et al → Stacy Brothers Mining, Inc.; 2008-02-27 to current/open; source msha-controller-operator-history