# Relationship history for MSHA mine 2602796

Current hierarchy: **Loren E  Hunewill → H.E. Hunewill Construction Co.,Inc. → Doppstadt SM-720 Trommel**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Loren E  Hunewill  et al → Doppstadt SM-720 Trommel; 1978-03-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** H.E. Hunewill Construction Co.,Inc. → Doppstadt SM-720 Trommel; 2016-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Loren E  Hunewill  et al → H.E. Hunewill Construction Co.,Inc.; 2016-04-20 to current/open; source msha-controller-operator-history