# Relationship history for MSHA mine 1518590

Current hierarchy: **Susan  Branham → M & D Pipeline Incorporated → No 3 Surface**

- 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:** Ocie A  May → No 3 Surface; 2001-09-21 to 2003-07-13; source msha-controller-operator-history
- **operator_operates_mine:** M & D Pipeline Incorporated → No 3 Surface; 2002-11-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ocie A  May → M & D Pipeline Incorporated; 2002-11-25 to 2003-07-13; source msha-controller-operator-history
- **controller_controls_mine:** Susan  Branham → No 3 Surface; 2003-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Susan  Branham → M & D Pipeline Incorporated; 2003-07-14 to current/open; source msha-controller-operator-history