# Relationship history for MSHA mine 2104118

Current hierarchy: **Kevin  Gustafson → Gustafson Excavating Inc → Harris 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

- **operator_operates_mine:** Gustafson Excavating Inc → Harris Pit; 2026-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kevin  Gustafson → Harris Pit; 2026-05-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin  Gustafson → Gustafson Excavating Inc; 2026-05-26 to current/open; source msha-controller-operator-history