# Relationship history for MSHA mine 4105335

Current hierarchy: **Iron Oak Energy Solutions LLC → Iron Oak Permian LLC → El Dorado Plant**

- 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:** ELD Operations, LLC → El Dorado Plant; 2018-02-09 to 2019-03-27; source msha-controller-operator-history
- **controller_controls_mine:** John  Cross et al → El Dorado Plant; 2018-02-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Cross et al → ELD Operations, LLC; 2018-02-09 to 2019-03-27; source msha-controller-operator-history
- **controller_controls_operator:** Will  Glusac et al → ELD Operations, LLC; 2018-02-09 to 2019-03-27; source msha-controller-operator-history
- **controller_controls_mine:** Black Mountain Sand Holdings LLC → El Dorado Plant; 2018-12-06 to 2024-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Iron Oak Permian LLC → El Dorado Plant; 2019-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Black Mountain Sand Holdings LLC → Iron Oak Permian LLC; 2019-03-28 to 2024-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Iron Oak Energy Solutions LLC → El Dorado Plant; 2024-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Iron Oak Energy Solutions LLC → Iron Oak Permian LLC; 2024-11-01 to current/open; source msha-controller-operator-history