# Relationship history for MSHA mine 3401684

Current hierarchy: **Kiowa County-OK → Kiowa County District #1 → Kiowa County District #1**

- 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:** Tonto Construction Inc → Kiowa County District #1; 1989-06-01 to 2000-05-07; source msha-controller-operator-history
- **controller_controls_mine:** Leatherman Cheryl → Kiowa County District #1; 1989-06-01 to 2000-05-07; source msha-controller-operator-history
- **controller_controls_operator:** Leatherman Cheryl → Tonto Construction Inc; 1989-06-01 to 2000-05-07; source msha-controller-operator-history
- **operator_operates_mine:** Kiowa County District #1 → Kiowa County District #1; 2000-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kiowa County-OK → Kiowa County District #1; 2000-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kiowa County-OK → Kiowa County District #1; 2000-05-08 to current/open; source msha-controller-operator-history