# Relationship history for MSHA mine 1518885

Current hierarchy: **David A  Wiley; Anthony R  Atti → Norwalk Coal LLC → Mine 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

- **controller_controls_mine:** Scott  Kembel → Mine No. 1; 1999-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Scott Kembel → Mine No. 1; 2005-05-23 to 2005-06-15; source msha-controller-operator-history
- **controller_controls_operator:** Scott  Kembel → Scott Kembel; 2005-05-23 to 2005-06-15; source msha-controller-operator-history
- **operator_operates_mine:** Norwalk Coal LLC → Mine No. 1; 2005-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** David A  Wiley et al → Mine No. 1; 2005-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David A  Wiley et al → Norwalk Coal LLC; 2005-06-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anthony R  Atti et al → Norwalk Coal LLC; 2005-06-16 to current/open; source msha-controller-operator-history