# Relationship history for MSHA mine 1302260

Current hierarchy: **Lindsey R  Falk → L. R. Falk Construction Company → Wash Plant No. 3**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Lindsey R  Falk et al → Wash Plant No. 3; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** L. R. Falk Construction Company → Wash Plant No. 3; 2002-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lindsey R  Falk et al → L. R. Falk Construction Company; 2002-03-01 to current/open; source msha-controller-operator-history