# Relationship history for MSHA mine 3200941

Current hierarchy: **Dustin  Mortenson; Jason  Storbakken → Storbakken & Sons Construction Inc → JRC-1**

- 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:** Storbakken & Sons Construction Inc → JRC-1; 2012-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dustin  Mortenson et al → JRC-1; 2012-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dustin  Mortenson et al → Storbakken & Sons Construction Inc; 2012-03-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason  Storbakken et al → Storbakken & Sons Construction Inc; 2012-03-19 to current/open; source msha-controller-operator-history