# Relationship history for MSHA mine 0801409

Current hierarchy: **Ryan  Albregts → Epic Stoneworks, Inc. → Epic Stoneworks, Inc.**

- 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:** Epic Stoneworks, Inc. → Epic Stoneworks, Inc.; 2016-02-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ryan  Albregts → Epic Stoneworks, Inc.; 2016-02-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ryan  Albregts → Epic Stoneworks, Inc.; 2016-02-04 to current/open; source msha-controller-operator-history