# Relationship history for MSHA mine 3401306

Current hierarchy: **Barton Jerry → Kingfisher Construction Service Company → Whalen Pit**

- 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:** Barton Jerry → Whalen Pit; 1980-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kingfisher Construction Service Company → Whalen Pit; 1980-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barton Jerry → Kingfisher Construction Service Company; 1980-12-01 to current/open; source msha-controller-operator-history