# Relationship history for MSHA mine 4703812

Current hierarchy: **Craig  Kisser → Glacial Ridge Stone, LLC. → GRS-1**

- 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:** GLACIAL RIDGE STONE, LLC. → GRS-1; 2017-10-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Craig  Kisser → GRS-1; 2017-10-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craig  Kisser → GLACIAL RIDGE STONE, LLC.; 2017-10-24 to current/open; source msha-controller-operator-history