# Relationship history for MSHA mine 3800085

Current hierarchy: **Dicalite Management Holdings, LLC → Specialty Vermiculite LLC → Enoree Operations**

- 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:** W R Grace & Co. → Enoree Operations; 1950-01-01 to 2011-12-31; source msha-controller-operator-history
- **controller_controls_mine:** W R Grace & Company → Enoree Operations; 1950-01-01 to 2021-09-21; source msha-controller-operator-history
- **controller_controls_operator:** W R Grace & Company → W R Grace & Co.; 1950-01-01 to 2011-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Specialty Vermiculite LLC → Enoree Operations; 2012-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jason  Guzek → Enoree Operations; 2012-01-01 to 2013-11-05; source msha-controller-operator-history
- **controller_controls_operator:** Jason  Guzek → Specialty Vermiculite LLC; 2012-01-01 to 2013-11-05; source msha-controller-operator-history
- **controller_controls_mine:** Derek J  Cusack → Enoree Operations; 2013-11-06 to 2016-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Derek J  Cusack → Specialty Vermiculite LLC; 2013-11-06 to 2016-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Raymond G Perelman → Enoree Operations; 2017-01-01 to 2019-01-14; source msha-controller-operator-history
- **controller_controls_operator:** Raymond G Perelman → Specialty Vermiculite LLC; 2017-01-01 to 2019-01-14; source msha-controller-operator-history
- **controller_controls_mine:** Dicalite Management Holdings, LLC → Enoree Operations; 2019-01-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dicalite Management Holdings, LLC → Specialty Vermiculite LLC; 2019-01-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Standard Industries Holdings Inc → Enoree Operations; 2021-09-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Standard Industries Holdings Inc → W R Grace & Co.; 2021-09-22 to 2011-12-31; source msha-controller-operator-history