# Relationship history for MSHA mine 4801703

Current hierarchy: **Dennis  Lawrence; John  Gibbs → Northern Plains Investments, LLC → Screen No. 1**

- 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:** Northern Plains Investments, LLC → Screen No. 1; 2006-10-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dennis  Lawrence et al → Screen No. 1; 2006-10-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Lawrence et al → Northern Plains Investments, LLC; 2006-10-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Gibbs et al → Northern Plains Investments, LLC; 2006-10-06 to current/open; source msha-controller-operator-history