# Relationship history for MSHA mine 4703117

Current hierarchy: **Jack J Peters → Peters Concrete Company → Harp Screen-Telescreen SN-421**

- 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

- **controller_controls_mine:** Jack J Peters → Harp Screen-Telescreen SN-421; 1985-09-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Peters Concrete Company → Harp Screen-Telescreen SN-421; 1997-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack J Peters → Peters Concrete Company; 1997-07-01 to current/open; source msha-controller-operator-history