# Relationship history for MSHA mine 0505023

Current hierarchy: **William  Tezak; Aaron  Eggleston → Super Ex., LLC → Portable Unit Eljay1140**

- 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:** Super Ex., LLC → Portable Unit Eljay1140; 2013-12-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William  Tezak → Portable Unit Eljay1140; 2013-12-06 to 2020-12-31; source msha-controller-operator-history
- **controller_controls_operator:** William  Tezak → Super Ex., LLC; 2013-12-06 to 2020-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Aaron  Eggleston et al → Portable Unit Eljay1140; 2021-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aaron  Eggleston et al → Super Ex., LLC; 2021-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Tezak et al → Super Ex., LLC; 2021-01-01 to current/open; source msha-controller-operator-history