# Relationship history for MSHA mine 0505063

Current hierarchy: **Susan  Dorris; Joseph  Dorris → Glacier Peak Mining LLC → Topaz Mountain Gem 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:** Glacier Peak Mining LLC → Topaz Mountain Gem Mine; 2016-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joseph  Dorris et al → Topaz Mountain Gem Mine; 2016-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Dorris et al → Glacier Peak Mining LLC; 2016-05-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Susan  Dorris et al → Glacier Peak Mining LLC; 2016-05-31 to current/open; source msha-controller-operator-history