# Relationship history for MSHA mine 4800957

Current hierarchy: **CCI  (Clyde Companies Inc) → Suncore Construction and Materials Inc. → SINCLAIR PIT**

- 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:** Fryburger Sand & Gravel Inc → SINCLAIR PIT; 1950-01-01 to 1979-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Fryburger  et al → SINCLAIR PIT; 1950-01-01 to 1979-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Fryburger  et al → Fryburger Sand & Gravel Inc; 1950-01-01 to 1979-08-31; source msha-controller-operator-history
- **controller_controls_mine:** CCI  (Clyde Companies Inc) → SINCLAIR PIT; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** GORGE ROCK PRODUCTS, INC. → SINCLAIR PIT; 1979-09-01 to 2001-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Winter  et al → SINCLAIR PIT; 1979-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Winter  et al → GORGE ROCK PRODUCTS, INC.; 1979-09-01 to 2001-08-27; source msha-controller-operator-history
- **controller_controls_operator:** Don F  Winter  et al → GORGE ROCK PRODUCTS, INC.; 1979-09-01 to 2001-08-27; source msha-controller-operator-history
- **operator_operates_mine:** Gorge Rock Products Inc → SINCLAIR PIT; 2001-08-28 to 2017-07-09; source msha-controller-operator-history
- **controller_controls_operator:** CCI  (Clyde Companies Inc) → Gorge Rock Products Inc; 2001-08-28 to 2017-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Suncore Construction and Materials Inc. → SINCLAIR PIT; 2017-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CCI  (Clyde Companies Inc) → Suncore Construction and Materials Inc.; 2017-07-10 to current/open; source msha-controller-operator-history