# Relationship history for MSHA mine 1517602

Current hierarchy: **Susan  Branham → M & D Pipeline, Inc. → Mine #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:** Gary N  Allen et al → Mine #1; 1992-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Beaver Minerals Inc → Mine #1; 1994-10-01 to 2001-09-20; source msha-controller-operator-history
- **controller_controls_operator:** Gary N  Allen et al → Beaver Minerals Inc; 1994-10-01 to 2001-09-20; source msha-controller-operator-history
- **operator_operates_mine:** M & D Pipeline, Inc. → Mine #1; 2001-09-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ocie A  May → Mine #1; 2001-09-21 to 2003-07-13; source msha-controller-operator-history
- **controller_controls_operator:** Ocie A  May → M & D Pipeline, Inc.; 2001-09-21 to 2003-07-13; source msha-controller-operator-history
- **controller_controls_mine:** Susan  Branham → Mine #1; 2003-07-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Susan  Branham → M & D Pipeline, Inc.; 2003-07-14 to current/open; source msha-controller-operator-history