# Relationship history for MSHA mine 5001801

Current hierarchy: **Steve C Pomrenke; Shawn M Pomrenke → Northwest Gold Diggers → Glacier Creek 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:** Steve's Mining & Repair → Glacier Creek Mine; 2004-07-20 to 2016-07-07; source msha-controller-operator-history
- **controller_controls_mine:** Steve C  Pomrenke → Glacier Creek Mine; 2004-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve C  Pomrenke → Steve's Mining & Repair; 2004-07-20 to 2016-07-07; source msha-controller-operator-history
- **operator_operates_mine:** Northwest Gold Diggers → Glacier Creek Mine; 2016-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steve C Pomrenke et al → Glacier Creek Mine; 2016-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve C Pomrenke et al → Northwest Gold Diggers; 2016-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shawn M Pomrenke et al → Northwest Gold Diggers; 2016-07-08 to current/open; source msha-controller-operator-history