# Relationship history for MSHA mine 4105387

Current hierarchy: **Iron Oak Energy Solutions LLC → Iron Oak Eagle Ford LLC → Dimmit Mine**

- 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:** Iron Oak Eagle Ford LLC → Dimmit Mine; 2018-09-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Black Mountain Sand Holdings LLC et al → Dimmit Mine; 2018-09-13 to 2022-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Black Mountain Sand Holdings LLC et al → Iron Oak Eagle Ford LLC; 2018-09-13 to 2022-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Owl Rock et al → Iron Oak Eagle Ford LLC; 2018-09-13 to 2022-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Black Mountain Sand Holdings LLC → Dimmit Mine; 2022-07-01 to 2024-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Black Mountain Sand Holdings LLC → Iron Oak Eagle Ford LLC; 2022-07-01 to 2024-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Iron Oak Energy Solutions LLC → Dimmit Mine; 2024-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Iron Oak Energy Solutions LLC → Iron Oak Eagle Ford LLC; 2024-11-01 to current/open; source msha-controller-operator-history