# Relationship history for MSHA mine 1302012

Current hierarchy: **Lindsey R  Falk → L R Falk Construction Company → Wagner Quarry**

- 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:** Lindsey R  Falk et al → Wagner Quarry; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** L R Falk Construction Company → Wagner Quarry; 1984-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lindsey R  Falk et al → L R Falk Construction Company; 1984-02-01 to current/open; source msha-controller-operator-history