# Relationship history for MSHA mine 1002216

Current hierarchy: **Liann  Swenson; Janelle  Swenson → Conmat, Inc. → Plant #3**

- 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:** Janelle  Swenson  et al → Plant #3; 2006-11-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Conmat, Inc. → Plant #3; 2011-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Janelle  Swenson  et al → Conmat, Inc.; 2011-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Liann  Swenson  et al → Conmat, Inc.; 2011-04-20 to current/open; source msha-controller-operator-history