# Relationship history for MSHA mine 3602181

Current hierarchy: **William  Lahr III → Dale Lenig Coal, LLC → Dale Lenig Coal Washery**

- 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:** Dale Lenig Coal Washery → Dale Lenig Coal Washery; 1950-01-01 to 2017-05-22; source msha-controller-operator-history
- **controller_controls_mine:** Dale  Lenig → Dale Lenig Coal Washery; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale  Lenig → Dale Lenig Coal Washery; 1950-01-01 to 2017-05-22; source msha-controller-operator-history
- **operator_operates_mine:** Dale Lenig Coal, LLC → Dale Lenig Coal Washery; 2017-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William  Lahr III → Dale Lenig Coal Washery; 2017-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Lahr III → Dale Lenig Coal, LLC; 2017-05-23 to current/open; source msha-controller-operator-history