# Relationship history for MSHA mine 1519617

Current hierarchy: **Lipari Energy → B & W Resources, Inc. → Bingham Job #13**

- 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:** David  Wells → Bingham Job #13; 2001-05-01 to 2008-09-11; source msha-controller-operator-history
- **controller_controls_mine:** Lipari Energy → Bingham Job #13; 2008-09-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B & W Resources, Inc. → Bingham Job #13; 2011-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lipari Energy → B & W Resources, Inc.; 2011-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Wells → B & W Resources, Inc.; 2011-08-16 to 2008-09-11; source msha-controller-operator-history