# Relationship history for MSHA mine 3901621

Current hierarchy: **Jeffrey S  Halme → Halme Inc. → Norden Pit**

- 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:** Halme Inc. → Norden Pit; 2016-10-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeffrey S  Halme → Norden Pit; 2016-10-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey S  Halme → Halme Inc.; 2016-10-25 to current/open; source msha-controller-operator-history