# Relationship history for MSHA mine 1518739

Current hierarchy: **Glenn David  May II; Ocie Ann  May → Noble Coal LLC → Surface 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Noble Coal LLC → Surface No. 1; 2004-03-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ocie A  May → Surface No. 1; 2004-03-30 to 2022-03-10; source msha-controller-operator-history
- **controller_controls_operator:** Ocie A  May → Noble Coal LLC; 2004-03-30 to 2022-03-10; source msha-controller-operator-history
- **controller_controls_mine:** Glenn David  May II et al → Surface No. 1; 2022-03-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Glenn David  May II et al → Noble Coal LLC; 2022-03-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ocie Ann  May et al → Noble Coal LLC; 2022-03-11 to current/open; source msha-controller-operator-history