# Relationship history for MSHA mine 3304507

Current hierarchy: **Empire Diversified Energy, Inc. → Empire Minerals of Ohio, Inc. → Dickerson P3**

- 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:** DTE Dickerson LLC → Dickerson P3; 2002-07-16 to 2011-10-30; source msha-controller-operator-history
- **controller_controls_mine:** DTE Energy Company → Dickerson P3; 2002-07-16 to 2011-07-28; source msha-controller-operator-history
- **controller_controls_operator:** DTE Energy Company → DTE Dickerson LLC; 2002-07-16 to 2011-07-28; source msha-controller-operator-history
- **controller_controls_mine:** Eco Delicate Process Systems LLC → Dickerson P3; 2011-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eco Delicate Process Systems LLC → DTE Dickerson LLC; 2011-07-29 to 2011-10-30; source msha-controller-operator-history
- **operator_operates_mine:** Dickerson LLC → Dickerson P3; 2011-10-31 to 2024-12-05; source msha-controller-operator-history
- **controller_controls_mine:** Eco Delicate Process Systems LLC → Dickerson P3; 2011-10-31 to 2017-04-20; source msha-controller-operator-history
- **controller_controls_operator:** Eco Delicate Process Systems LLC → Dickerson LLC; 2011-10-31 to 2017-04-20; source msha-controller-operator-history
- **controller_controls_mine:** Richard  Tuorto → Dickerson P3; 2017-04-21 to 2019-04-06; source msha-controller-operator-history
- **controller_controls_operator:** Richard  Tuorto → Dickerson LLC; 2017-04-21 to 2019-04-06; source msha-controller-operator-history
- **controller_controls_mine:** Empire Minerals of Ohio Inc → Dickerson P3; 2019-04-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Empire Minerals of Ohio Inc → Dickerson LLC; 2019-04-07 to 2024-12-05; source msha-controller-operator-history
- **operator_operates_mine:** Empire Minerals of Ohio, Inc. → Dickerson P3; 2024-12-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Empire Diversified Energy, Inc. → Dickerson P3; 2024-12-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Empire Diversified Energy, Inc. → Empire Minerals of Ohio, Inc.; 2024-12-06 to current/open; source msha-controller-operator-history