# Relationship history for MSHA mine 3304109

Current hierarchy: **Keith B  Kimble → KIMBLE CLAY & LIMESTONE → KIMBLE #1**

- 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:** Floyd E Kimble → KIMBLE #1; 1950-01-01 to 2001-08-28; source msha-controller-operator-history
- **operator_operates_mine:** Kimble Clay & Limestone → KIMBLE #1; 1987-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Floyd E Kimble → Kimble Clay & Limestone; 1987-09-01 to 2001-08-28; source msha-controller-operator-history
- **controller_controls_mine:** Keith B  Kimble → KIMBLE #1; 2001-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith B  Kimble → Kimble Clay & Limestone; 2001-08-29 to current/open; source msha-controller-operator-history