# Relationship history for MSHA mine 4703443

Current hierarchy: **Scott W  Janssen → Daanen & Janssen, Inc. → Specialty Production**

- 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

- **controller_controls_mine:** William C  Janssen → Specialty Production; 1950-01-01 to 2019-06-06; source msha-controller-operator-history
- **operator_operates_mine:** Daanen & Janssen Inc → Specialty Production; 2006-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William C  Janssen → Daanen & Janssen Inc; 2006-01-01 to 2019-06-06; source msha-controller-operator-history
- **controller_controls_mine:** Scott W  Janssen → Specialty Production; 2019-06-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott W  Janssen → Daanen & Janssen Inc; 2019-06-07 to current/open; source msha-controller-operator-history