# Relationship history for MSHA mine 2103865

Current hierarchy: **Dan  Landwehr → Landwehr Construction, Inc. → TH169 Kasota Pit**

- 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:** Dan  Landwehr et al → TH169 Kasota Pit; 2015-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Landwehr Construction, Inc. → TH169 Kasota Pit; 2015-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dan  Landwehr et al → Landwehr Construction, Inc.; 2015-07-23 to current/open; source msha-controller-operator-history