# Relationship history for MSHA mine 5001673

Current hierarchy: **Eric D  Kuenzi; John L  Kuenzi; Kerry D  Kuenzi → K&E Alaska → Granite Creek Portable**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Tisher Construction → Granite Creek Portable; 2000-11-01 to 2018-07-18; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Tisher → Granite Creek Portable; 2000-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Tisher → Tisher Construction; 2000-11-01 to 2018-07-18; source msha-controller-operator-history
- **operator_operates_mine:** K&E Alaska → Granite Creek Portable; 2018-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eric D  Kuenzi et al → Granite Creek Portable; 2018-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eric D  Kuenzi et al → K&E Alaska; 2018-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John L  Kuenzi et al → K&E Alaska; 2018-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kerry D  Kuenzi et al → K&E Alaska; 2018-07-19 to current/open; source msha-controller-operator-history