# Relationship history for MSHA mine 4407023

Current hierarchy: **David  Powers → Mattie Boo, LLC. → No. 2**

- 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:** Norton Coal Company Llc → No. 2; 2001-03-01 to 2001-09-20; source msha-controller-operator-history
- **controller_controls_mine:** Southern Mining Co → No. 2; 2001-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Southern Mining Co → Norton Coal Company Llc; 2001-03-01 to 2001-09-20; source msha-controller-operator-history
- **operator_operates_mine:** Access Coal Company → No. 2; 2001-09-21 to 2004-10-28; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth L  Stacy → No. 2; 2001-09-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth L  Stacy → Access Coal Company; 2001-09-21 to 2004-10-28; source msha-controller-operator-history
- **controller_controls_mine:** David  Powers → No. 2; 2004-09-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mattie Boo, LLC. → No. 2; 2004-10-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Powers → Mattie Boo, LLC.; 2004-10-29 to current/open; source msha-controller-operator-history