# Relationship history for MSHA mine 2103960

Current hierarchy: **Richard A  Larsen; Mark B  Larsen → Larsen Dirtworks LLC → Evoquip 230R**

- 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:** Larsen Dirtworks LLC → Evoquip 230R; 2019-11-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard A  Larsen et al → Evoquip 230R; 2019-11-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard A  Larsen et al → Larsen Dirtworks LLC; 2019-11-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark B  Larsen et al → Larsen Dirtworks LLC; 2019-11-19 to current/open; source msha-controller-operator-history