# Relationship history for MSHA mine 1519244

Current hierarchy: **Roy  Hayes → Blue Ridge Excavating LLC → Mine #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:** Red Bush Coal, LLC → Mine #1; 2008-06-20 to 2013-01-22; source msha-controller-operator-history
- **controller_controls_mine:** Erik  Addington et al → Mine #1; 2008-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Erik  Addington et al → Red Bush Coal, LLC; 2008-06-20 to 2013-01-22; source msha-controller-operator-history
- **controller_controls_operator:** A Bruce  Addington et al → Red Bush Coal, LLC; 2008-06-20 to 2013-01-22; source msha-controller-operator-history
- **operator_operates_mine:** Blue Sky Excavating LLC → Mine #1; 2013-01-23 to 2014-03-17; source msha-controller-operator-history
- **controller_controls_mine:** Eddie  Lawson → Mine #1; 2013-01-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eddie  Lawson → Blue Sky Excavating LLC; 2013-01-23 to 2014-03-17; source msha-controller-operator-history
- **operator_operates_mine:** Blue Ridge Excavating LLC → Mine #1; 2014-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roy  Hayes → Mine #1; 2014-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roy  Hayes → Blue Ridge Excavating LLC; 2014-03-18 to current/open; source msha-controller-operator-history