# Relationship history for MSHA mine 2602297

Current hierarchy: **Jack N  Tedford → Jack N Tedford Inc → Lahontan 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Jack N  Tedford → Lahontan Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tri-States Rock & Mineral Inc → Lahontan Pit; 1996-07-01 to 2000-02-09; source msha-controller-operator-history
- **controller_controls_mine:** Neil R  Zoller → Lahontan Pit; 1996-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Neil R  Zoller → Tri-States Rock & Mineral Inc; 1996-07-01 to 2000-02-09; source msha-controller-operator-history
- **operator_operates_mine:** Jack N Tedford Inc → Lahontan Pit; 2000-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack N  Tedford → Jack N Tedford Inc; 2000-02-10 to current/open; source msha-controller-operator-history