# Relationship history for MSHA mine 0901188

Current hierarchy: **David W  Dye; Randy K  Smith → Echols Mill Quarry LLC → Echols Mill Quarry LLC**

- 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:** Echols Mill Quarry LLC → Echols Mill Quarry LLC; 2008-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David W  Dye  et al → Echols Mill Quarry LLC; 2008-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David W  Dye  et al → Echols Mill Quarry LLC; 2008-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy K  Smith  et al → Echols Mill Quarry LLC; 2008-03-08 to current/open; source msha-controller-operator-history