# Relationship history for MSHA mine 4703220

Current hierarchy: **Donald  Theys; Daniel  Theys → Theys Trucking & Excavating, Inc. → DAHLKE 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:** Donald  Theys et al → DAHLKE PIT; 1986-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Theys Trucking & Excavating Inc → DAHLKE PIT; 1999-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald  Theys et al → Theys Trucking & Excavating Inc; 1999-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel  Theys et al → Theys Trucking & Excavating Inc; 1999-10-01 to current/open; source msha-controller-operator-history