# Relationship history for MSHA mine 4104117

Current hierarchy: **Paul  Nelson → Paul Nelson Co Inc → Kirby's**

- 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

- **operator_operates_mine:** Rlh Materials → Kirby's; 1999-11-01 to 2001-01-04; source msha-controller-operator-history
- **controller_controls_mine:** Ronnie L  Hammons → Kirby's; 1999-11-01 to 2001-01-04; source msha-controller-operator-history
- **controller_controls_operator:** Ronnie L  Hammons → Rlh Materials; 1999-11-01 to 2001-01-04; source msha-controller-operator-history
- **operator_operates_mine:** Paul Nelson Co Inc → Kirby's; 2001-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Paul  Nelson → Kirby's; 2001-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Nelson → Paul Nelson Co Inc; 2001-01-05 to current/open; source msha-controller-operator-history