# Relationship history for MSHA mine 1601585

Current hierarchy: **DT Midstream Inc → DTM Louisiana Gathering, LLC → DTM Gen6 Proppants, LLC**

- 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

- **operator_operates_mine:** Gen6 Proppants, LLC → DTM Gen6 Proppants, LLC; 2019-04-26 to 2019-12-04; source msha-controller-operator-history
- **controller_controls_mine:** Momentum Midstream LLC → DTM Gen6 Proppants, LLC; 2019-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Momentum Midstream LLC → Gen6 Proppants, LLC; 2019-04-26 to 2019-12-04; source msha-controller-operator-history
- **operator_operates_mine:** DTM Louisiana Gathering, LLC → DTM Gen6 Proppants, LLC; 2019-12-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** DTE Energy Company → DTM Gen6 Proppants, LLC; 2019-12-05 to 2021-06-30; source msha-controller-operator-history
- **controller_controls_operator:** DTE Energy Company → DTM Louisiana Gathering, LLC; 2019-12-05 to 2021-06-30; source msha-controller-operator-history
- **controller_controls_mine:** DT Midstream Inc → DTM Gen6 Proppants, LLC; 2021-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** DT Midstream Inc → DTM Louisiana Gathering, LLC; 2021-07-01 to current/open; source msha-controller-operator-history