# Relationship history for MSHA mine 2104014

Current hierarchy: **DuWayn  Thygson; Bruce  Thygeson → Thygeson Construction Inc → Kleeman**

- 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:** DuWayn  Thygson et al → Kleeman; 2002-07-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Thygeson Construction Inc → Kleeman; 2021-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** DuWayn  Thygson et al → Thygeson Construction Inc; 2021-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bruce  Thygeson et al → Thygeson Construction Inc; 2021-07-28 to current/open; source msha-controller-operator-history