# Relationship history for MSHA mine 4105536

Current hierarchy: **Alta Rock Ventures, LLC → Victory Rock Texas LLC. → DA 4**

- 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:** Gravity Segregation LLC et al → DA 4; 2014-12-06 to 2015-12-20; source msha-controller-operator-history
- **controller_controls_mine:** Alta Rock Ventures, LLC → DA 4; 2015-12-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Victory Rock Texas LLC. → DA 4; 2020-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gravity Segregation LLC et al → Victory Rock Texas LLC.; 2020-12-01 to 2015-12-20; source msha-controller-operator-history
- **controller_controls_operator:** David  Knudsen et al → Victory Rock Texas LLC.; 2020-12-01 to 2015-12-20; source msha-controller-operator-history
- **controller_controls_operator:** Alta Rock Ventures, LLC → Victory Rock Texas LLC.; 2020-12-01 to current/open; source msha-controller-operator-history