# Relationship history for MSHA mine 4104173

Current hierarchy: **Coy  Craig; Dave  Mc Lemore → Blt Sand & Gravel Inc → GAINESVILLE PLANT**

- 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:** Coy  Craig  et al → GAINESVILLE PLANT; 1997-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Blt Sand & Gravel Inc → GAINESVILLE PLANT; 2000-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Coy  Craig  et al → Blt Sand & Gravel Inc; 2000-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dave  Mc Lemore  et al → Blt Sand & Gravel Inc; 2000-06-01 to current/open; source msha-controller-operator-history