# Relationship history for MSHA mine 3304579

Current hierarchy: **Keith B  Kimble → Kimble Company → L&M Permit- Barr Farm**

- 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:** Floyd E Kimble → L&M Permit- Barr Farm; 1950-01-01 to 2001-08-28; source msha-controller-operator-history
- **controller_controls_mine:** Keith B  Kimble → L&M Permit- Barr Farm; 2001-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** John E  Ling → L&M Permit- Barr Farm; 2003-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** L & M Mineral Co. → L&M Permit- Barr Farm; 2006-10-01 to 2025-04-03; source msha-controller-operator-history
- **controller_controls_operator:** John E  Ling → L & M Mineral Co.; 2006-10-01 to 2025-04-03; source msha-controller-operator-history
- **operator_operates_mine:** Kimble Company → L&M Permit- Barr Farm; 2025-04-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith B  Kimble → Kimble Company; 2025-04-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Floyd E Kimble → Kimble Company; 2025-04-04 to 2001-08-28; source msha-controller-operator-history