# Relationship history for MSHA mine 0404394

Current hierarchy: **Fenix & Scisson Inc → Fenix & Scisson Inc → Hop Demonstration Units #1-2-3 & 4**

- 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:** Fenix & Scisson Inc → Hop Demonstration Units #1-2-3 & 4; 1978-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fenix & Scisson Inc → Hop Demonstration Units #1-2-3 & 4; 1980-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fenix & Scisson Inc → Fenix & Scisson Inc; 1980-03-01 to current/open; source msha-controller-operator-history