# Relationship history for MSHA mine 4801575

Current hierarchy: **CCI  (Clyde Companies Inc) → Suncore Construction and Materials → Alpine Crusher and Wash**

- 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:** CCI  (Clyde Companies Inc) → Alpine Crusher and Wash; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kel-Co Inc → Alpine Crusher and Wash; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Call Gravel → Alpine Crusher and Wash; 2000-02-01 to 2002-09-01; source msha-controller-operator-history
- **controller_controls_operator:** Kel-Co Inc → Call Gravel; 2000-02-01 to 2002-09-01; source msha-controller-operator-history
- **operator_operates_mine:** Alota Sand & Gravel Inc. → Alpine Crusher and Wash; 2002-09-02 to 2023-01-26; source msha-controller-operator-history
- **controller_controls_mine:** Jackie I  Naef  et al → Alpine Crusher and Wash; 2002-09-02 to 2017-02-13; source msha-controller-operator-history
- **controller_controls_operator:** Jackie I  Naef  et al → Alota Sand & Gravel Inc.; 2002-09-02 to 2017-02-13; source msha-controller-operator-history
- **controller_controls_operator:** Douglas A  Naef  et al → Alota Sand & Gravel Inc.; 2002-09-02 to 2017-02-13; source msha-controller-operator-history
- **controller_controls_mine:** Greg  Stoddard et al → Alpine Crusher and Wash; 2017-02-14 to 2020-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Stoddard et al → Alota Sand & Gravel Inc.; 2017-02-14 to 2020-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Jed  Stoddard et al → Alota Sand & Gravel Inc.; 2017-02-14 to 2020-12-31; source msha-controller-operator-history
- **controller_controls_mine:** CCI  (Clyde Companies Inc) → Alpine Crusher and Wash; 2021-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CCI  (Clyde Companies Inc) → Alota Sand & Gravel Inc.; 2021-01-01 to 2023-01-26; source msha-controller-operator-history
- **operator_operates_mine:** Suncore Construction and Materials → Alpine Crusher and Wash; 2023-01-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CCI  (Clyde Companies Inc) → Suncore Construction and Materials; 2023-01-27 to current/open; source msha-controller-operator-history