# Relationship history for MSHA mine 3401720

Current hierarchy: **Jerry D Neff → Neff Building Stone Supply → Section 24 Fanshawe**

- 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:** Jerry D Neff → Section 24 Fanshawe; 1990-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Neff Building Stone Supply → Section 24 Fanshawe; 1990-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry D Neff → Neff Building Stone Supply; 1990-04-01 to current/open; source msha-controller-operator-history