# Relationship history for MSHA mine 1519032

Current hierarchy: **Kenneth L  Farley → Linn Branch Coal Incorporated → #3**

- 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:** Ricky  Blair → #3; 1997-01-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth L  Farley et al → #3; 2003-04-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Blair Coal Co Inc → #3; 2006-08-07 to 2007-08-26; source msha-controller-operator-history
- **controller_controls_operator:** Ricky  Blair → Blair Coal Co Inc; 2006-08-07 to 2007-08-26; source msha-controller-operator-history
- **operator_operates_mine:** Linn Branch Coal Incorporated → #3; 2007-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth L  Farley et al → Linn Branch Coal Incorporated; 2007-08-27 to current/open; source msha-controller-operator-history