# Relationship history for MSHA mine 1002057

Current hierarchy: **Karl T  Bonar → KB Grading & Excavation Inc → Mini Moore Mine**

- 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:** Kary S  Yates et al → Mini Moore Mine; 1998-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** K D Excavation LLC → Mini Moore Mine; 2004-07-28 to 2009-09-14; source msha-controller-operator-history
- **controller_controls_operator:** Kary S  Yates et al → K D Excavation LLC; 2004-07-28 to 2009-09-14; source msha-controller-operator-history
- **controller_controls_operator:** Cindy W  Yates et al → K D Excavation LLC; 2004-07-28 to 2009-09-14; source msha-controller-operator-history
- **operator_operates_mine:** KB Grading & Excavation Inc → Mini Moore Mine; 2009-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Karl T  Bonar → Mini Moore Mine; 2009-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Karl T  Bonar → KB Grading & Excavation Inc; 2009-09-15 to current/open; source msha-controller-operator-history