# Relationship history for MSHA mine 3901669

Current hierarchy: **Todd  Swenson; Jill  Swenson → Swenson Partnership → Spyder Screen Plant**

- 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:** Swenson Partnership → Spyder Screen Plant; 2022-08-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jill  Swenson et al → Spyder Screen Plant; 2022-08-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jill  Swenson et al → Swenson Partnership; 2022-08-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Todd  Swenson et al → Swenson Partnership; 2022-08-31 to current/open; source msha-controller-operator-history