# Relationship history for MSHA mine 3901632

Current hierarchy: **Jess  Hamman → Precision Dirtworks LLC → Precision Dirtworks LLC**

- 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:** Warren  Barse → Precision Dirtworks LLC; 2015-03-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dakota Constructors Inc → Precision Dirtworks LLC; 2018-06-12 to 2024-03-03; source msha-controller-operator-history
- **controller_controls_operator:** Warren  Barse → Dakota Constructors Inc; 2018-06-12 to 2024-03-03; source msha-controller-operator-history
- **operator_operates_mine:** Precision Dirtworks LLC → Precision Dirtworks LLC; 2024-03-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jess  Hamman → Precision Dirtworks LLC; 2024-03-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jess  Hamman → Precision Dirtworks LLC; 2024-03-04 to current/open; source msha-controller-operator-history