# Relationship history for MSHA mine 4202293

Current hierarchy: **CCI  (Clyde Companies Inc) → Geneva Rock Products, Inc. → CHICKEN CREEK GYPSUM MINE**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** CCI  (Clyde Companies Inc) → CHICKEN CREEK GYPSUM MINE; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Geneva Rock Products Inc → CHICKEN CREEK GYPSUM MINE; 2000-04-01 to 2002-10-31; source msha-controller-operator-history
- **controller_controls_operator:** CCI  (Clyde Companies Inc) → Geneva Rock Products Inc; 2000-04-01 to 2002-10-31; source msha-controller-operator-history
- **controller_controls_mine:** CCI  (Clyde Companies Inc) → CHICKEN CREEK GYPSUM MINE; 2002-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** H E Davis Construction Inc → CHICKEN CREEK GYPSUM MINE; 2002-11-01 to 2005-12-31; source msha-controller-operator-history
- **controller_controls_operator:** CCI  (Clyde Companies Inc) → H E Davis Construction Inc; 2002-11-01 to 2005-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Suncore Construction and Materials Inc. → CHICKEN CREEK GYPSUM MINE; 2006-01-01 to 2026-04-05; source msha-controller-operator-history
- **controller_controls_operator:** CCI  (Clyde Companies Inc) → Suncore Construction and Materials Inc.; 2006-01-01 to 2026-04-05; source msha-controller-operator-history
- **operator_operates_mine:** Geneva Rock Products, Inc. → CHICKEN CREEK GYPSUM MINE; 2026-04-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CCI  (Clyde Companies Inc) → Geneva Rock Products, Inc.; 2026-04-06 to current/open; source msha-controller-operator-history