# Relationship history for MSHA mine 0405294

Current hierarchy: **Dwane K  Johnson; John C  Heter → Industrial Mineral Fillers Llc → CASPAR MINE**

- 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:** Industrial Mineral Fillers Llc → CASPAR MINE; 1996-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dwane K  Johnson  et al → CASPAR MINE; 1996-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dwane K  Johnson  et al → Industrial Mineral Fillers Llc; 1996-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John C  Heter et al → Industrial Mineral Fillers Llc; 1996-09-01 to current/open; source msha-controller-operator-history