# Relationship history for MSHA mine 1700770

Current hierarchy: **Brad  St Peter → Portage Construction → St. Peter 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Portage Construction → St. Peter Pit; 2004-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Peter W  St Peter → St. Peter Pit; 2004-08-27 to 2012-09-13; source msha-controller-operator-history
- **controller_controls_operator:** Peter W  St Peter → Portage Construction; 2004-08-27 to 2012-09-13; source msha-controller-operator-history
- **controller_controls_mine:** Brad  St Peter → St. Peter Pit; 2012-09-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brad  St Peter → Portage Construction; 2012-09-14 to current/open; source msha-controller-operator-history