# Relationship history for MSHA mine 1519902

Current hierarchy: **Toni  Akers → Lazarus Coal, LLC → Mine No.1**

- 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:** Ryan  Johns → Mine No.1; 2021-05-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Northstar Sustainable Energy LLC → Mine No.1; 2021-05-19 to 2022-03-27; source msha-controller-operator-history
- **controller_controls_operator:** Ryan  Johns → Northstar Sustainable Energy LLC; 2021-05-19 to 2022-03-27; source msha-controller-operator-history
- **operator_operates_mine:** Lazarus Coal, LLC → Mine No.1; 2022-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vikki D Akers et al → Mine No.1; 2022-03-28 to 2024-05-13; source msha-controller-operator-history
- **controller_controls_operator:** Vikki D Akers et al → Lazarus Coal, LLC; 2022-03-28 to 2024-05-13; source msha-controller-operator-history
- **controller_controls_operator:** Toni K Akers et al → Lazarus Coal, LLC; 2022-03-28 to 2024-05-13; source msha-controller-operator-history
- **controller_controls_mine:** Toni  Akers → Mine No.1; 2024-05-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Toni  Akers → Lazarus Coal, LLC; 2024-05-14 to current/open; source msha-controller-operator-history