# Relationship history for MSHA mine 2601956

Current hierarchy: **Janess William K → Argus Mining Company → Argus Mill**

- 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:** Argus Mining Company → Argus Mill; 1986-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Janess William K → Argus Mill; 1986-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Janess William K → Argus Mining Company; 1986-04-01 to current/open; source msha-controller-operator-history