# Relationship history for MSHA mine 1519514

Current hierarchy: **Douglas  Warriner → Montana Bakken, LLC → D-1 Mine**

- 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:** Benjamin R.  Bennett → D-1 Mine; 1981-11-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Manalapan Mining Co., Inc. → D-1 Mine; 2010-07-18 to 2016-07-22; source msha-controller-operator-history
- **controller_controls_operator:** Benjamin R.  Bennett → Manalapan Mining Co., Inc.; 2010-07-18 to 2016-07-22; source msha-controller-operator-history
- **controller_controls_mine:** Douglas  Warriner → D-1 Mine; 2016-07-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Montana Bakken, LLC → D-1 Mine; 2016-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Douglas  Warriner → Montana Bakken, LLC; 2016-07-23 to current/open; source msha-controller-operator-history