# Relationship history for MSHA mine 5001767

Current hierarchy: **Arctic Slope Regional Corp → ASRC Earthworks LLC → EAFB - Davis Hwy**

- 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:** SKW/Eskimos, Inc. → EAFB - Davis Hwy; 2003-05-19 to 2008-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Arctic Slope Regional Corp → EAFB - Davis Hwy; 2003-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arctic Slope Regional Corp → SKW/Eskimos, Inc.; 2003-05-19 to 2008-03-31; source msha-controller-operator-history
- **operator_operates_mine:** ASRC Constructors Inc → EAFB - Davis Hwy; 2008-04-01 to 2009-03-11; source msha-controller-operator-history
- **controller_controls_mine:** Arctic Slope Regional Corp → EAFB - Davis Hwy; 2008-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arctic Slope Regional Corp → ASRC Constructors Inc; 2008-04-01 to 2009-03-11; source msha-controller-operator-history
- **operator_operates_mine:** ASRC Civil Construction LLC → EAFB - Davis Hwy; 2009-03-12 to 2018-03-20; source msha-controller-operator-history
- **controller_controls_mine:** Arctic Slope Regional Corp → EAFB - Davis Hwy; 2009-03-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arctic Slope Regional Corp → ASRC Civil Construction LLC; 2009-03-12 to 2018-03-20; source msha-controller-operator-history
- **operator_operates_mine:** ASRC Earthworks LLC → EAFB - Davis Hwy; 2018-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Arctic Slope Regional Corp → EAFB - Davis Hwy; 2018-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arctic Slope Regional Corp → ASRC Earthworks LLC; 2018-03-21 to current/open; source msha-controller-operator-history