# Relationship history for MSHA mine 5001694

Current hierarchy: **Albert E  Schafer → Afognak Const. & Excavating  Inc. → Screen Plant**

- 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:** Afognak Const. & Excavating  Inc. → Screen Plant; 2001-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Albert E  Schafer → Screen Plant; 2001-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Albert E  Schafer → Afognak Const. & Excavating  Inc.; 2001-10-15 to current/open; source msha-controller-operator-history