# Relationship history for MSHA mine 4407233

Current hierarchy: **Jerry  Farmer; Bobby  Ketron → Mountain Fules Inc → GOBCO #8**

- 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:** Darrell L  Boyd → GOBCO #8; 2004-11-05 to 2006-07-11; source msha-controller-operator-history
- **controller_controls_mine:** Bobby  Ketron et al → GOBCO #8; 2006-07-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Fules Inc → GOBCO #8; 2008-08-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bobby  Ketron et al → Mountain Fules Inc; 2008-08-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Farmer et al → Mountain Fules Inc; 2008-08-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darrell L  Boyd → Mountain Fules Inc; 2008-08-04 to 2006-07-11; source msha-controller-operator-history