# Relationship history for MSHA mine 2000807

Current hierarchy: **David V  Taylor II → Taylor Construction Services, Inc → TayCon Properties, LLC**

- 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

- **operator_operates_mine:** DeBoer Materials, Inc → TayCon Properties, LLC; 1950-01-01 to 2006-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Celia A  De Boer → TayCon Properties, LLC; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Celia A  De Boer → DeBoer Materials, Inc; 1950-01-01 to 2006-02-28; source msha-controller-operator-history
- **operator_operates_mine:** D & M Contracting & Materials → TayCon Properties, LLC; 2006-03-01 to 2009-06-16; source msha-controller-operator-history
- **controller_controls_mine:** Andrew T.  DeBoer → TayCon Properties, LLC; 2006-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Andrew T.  DeBoer → D & M Contracting & Materials; 2006-03-01 to 2009-06-16; source msha-controller-operator-history
- **operator_operates_mine:** Taylor Construction Services, Inc → TayCon Properties, LLC; 2009-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David V  Taylor II → TayCon Properties, LLC; 2009-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David V  Taylor II → Taylor Construction Services, Inc; 2009-06-17 to current/open; source msha-controller-operator-history