# Relationship history for MSHA mine 1301958

Current hierarchy: **William H  Giese → Giese Construction Company Inc → Nielsen 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:** Giese Construction Company Inc → Nielsen Pit; 1980-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William H  Giese → Nielsen Pit; 1980-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William H  Giese → Giese Construction Company Inc; 1980-08-01 to current/open; source msha-controller-operator-history