# Relationship history for MSHA mine 0600670

Current hierarchy: **Matthew T Kobyluck → Kobyluck Enterprises Inc → Portable Division**

- 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

- **controller_controls_mine:** Daniel  W  Kobyluck → Portable Division; 1986-07-30 to 2009-06-15; source msha-controller-operator-history
- **controller_controls_mine:** Dennis  Botticello → Portable Division; 1992-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Botticello Inc → Portable Division; 1999-04-01 to 2002-08-07; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Botticello → Botticello Inc; 1999-04-01 to 2002-08-07; source msha-controller-operator-history
- **operator_operates_mine:** Kobyluck Sand & Gravel Inc → Portable Division; 2002-08-08 to 2009-06-15; source msha-controller-operator-history
- **controller_controls_operator:** Daniel  W  Kobyluck → Kobyluck Sand & Gravel Inc; 2002-08-08 to 2009-06-15; source msha-controller-operator-history
- **controller_controls_mine:** Matthew T  Kobyluck et al → Portable Division; 2009-02-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** K5 Aggregates Inc → Portable Division; 2009-06-16 to 2022-02-16; source msha-controller-operator-history
- **controller_controls_operator:** Matthew T  Kobyluck et al → K5 Aggregates Inc; 2009-06-16 to 2022-02-16; source msha-controller-operator-history
- **controller_controls_mine:** Matthew T  Kobyluck et al → Portable Division; 2009-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew T  Kobyluck et al → Kobyluck Sand & Gravel Inc; 2009-06-16 to 2009-06-15; source msha-controller-operator-history
- **controller_controls_mine:** Matthew T Kobyluck → Portable Division; 2018-03-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kobyluck Enterprises Inc → Portable Division; 2022-02-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matthew T Kobyluck → Kobyluck Enterprises Inc; 2022-02-17 to current/open; source msha-controller-operator-history