# Relationship history for MSHA mine 4407365

Current hierarchy: **Jerry  Farmer; Bobby  Ketron → Mountain Fuels Inc → Gobco #12**

- 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 #12; 2004-11-05 to 2006-07-11; source msha-controller-operator-history
- **controller_controls_mine:** Jerry  Farmer et al → Gobco #12; 2006-07-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Fuels Inc → Gobco #12; 2016-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Farmer et al → Mountain Fuels Inc; 2016-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bobby  Ketron et al → Mountain Fuels Inc; 2016-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darrell L  Boyd → Mountain Fuels Inc; 2016-10-07 to 2006-07-11; source msha-controller-operator-history