# Relationship history for MSHA mine 3503518

Current hierarchy: **Calder  Foss; Trevor  Weisenfluh → Mountain States Materials Inc → Cinder Butte**

- 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:** Cinder Butte Rock Products → Cinder Butte; 2001-01-01 to 2026-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Joy  Foss  et al → Cinder Butte; 2001-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joy  Foss  et al → Cinder Butte Rock Products; 2001-01-01 to 2026-06-14; source msha-controller-operator-history
- **operator_operates_mine:** Mountain States Materials Inc → Cinder Butte; 2026-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Calder  Foss et al → Cinder Butte; 2026-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Calder  Foss et al → Mountain States Materials Inc; 2026-06-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Trevor  Weisenfluh et al → Mountain States Materials Inc; 2026-06-15 to current/open; source msha-controller-operator-history