# Relationship history for MSHA mine 3400008

Current hierarchy: **United States Lime & Minerals Inc → Mill Creek Dolomite LLC → MILL CREEK DOLOMITE**

- 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:** S C R-Sibelco Nv et al → MILL CREEK DOLOMITE; 1950-01-01 to 2020-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Delta Mining Corp → MILL CREEK DOLOMITE; 1950-01-01 to 1990-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Don  Wallace → MILL CREEK DOLOMITE; 1950-01-01 to 1990-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Don  Wallace → Delta Mining Corp; 1950-01-01 to 1990-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Unimin Corp → MILL CREEK DOLOMITE; 1990-04-01 to 2011-07-10; source msha-controller-operator-history
- **controller_controls_operator:** S C R-Sibelco Nv et al → Unimin Corp; 1990-04-01 to 2011-07-10; source msha-controller-operator-history
- **operator_operates_mine:** Mill Creek Dolomite LLC → MILL CREEK DOLOMITE; 2011-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** MIN-AD → MILL CREEK DOLOMITE; 2011-07-11 to 2022-02-09; source msha-controller-operator-history
- **controller_controls_operator:** MIN-AD → Mill Creek Dolomite LLC; 2011-07-11 to 2022-02-09; source msha-controller-operator-history
- **controller_controls_mine:** Covia Holdings LLC → MILL CREEK DOLOMITE; 2021-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Covia Holdings LLC → Unimin Corp; 2021-01-01 to 2011-07-10; source msha-controller-operator-history
- **controller_controls_mine:** United States Lime & Minerals Inc → MILL CREEK DOLOMITE; 2022-02-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** United States Lime & Minerals Inc → Mill Creek Dolomite LLC; 2022-02-10 to current/open; source msha-controller-operator-history