# Relationship history for MSHA mine 2002941

Current hierarchy: **Gentner Incorporated → CTE Sand & Gravel Inc → Staib Rd**

- 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:** Clinton Tecumseh Enterprises Inc → Staib Rd; 1994-09-01 to 2007-10-28; source msha-controller-operator-history
- **controller_controls_mine:** Kuhlman Construction Products Inc → Staib Rd; 1994-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kuhlman Construction Products Inc → Clinton Tecumseh Enterprises Inc; 1994-09-01 to 2007-10-28; source msha-controller-operator-history
- **operator_operates_mine:** CTE Sand & Gravel Inc → Staib Rd; 2007-10-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gentner Incorporated → Staib Rd; 2007-10-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gentner Incorporated → CTE Sand & Gravel Inc; 2007-10-29 to current/open; source msha-controller-operator-history