# Relationship history for MSHA mine 3503974

Current hierarchy: **Kenneth  Barnard; Amie  Barnard → Riley Creek Rocks LLC → Ken Barnard**

- 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:** Riley Creek Rocks LLC → Ken Barnard; 2025-06-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Amie  Barnard et al → Ken Barnard; 2025-06-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amie  Barnard et al → Riley Creek Rocks LLC; 2025-06-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth  Barnard et al → Riley Creek Rocks LLC; 2025-06-26 to current/open; source msha-controller-operator-history