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Civil Engineers- Landscape Architects- Surveyors in Eastern Iowa's I-380 Corridor Since 1953. Headquartered in Hiawatha, IA. 319.362.9548, info@halleng.com
US 1860 boyson road
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Civil Engineers- Landscape Architects- Surveyors in Eastern Iowa's I-380 Corridor Since 1953. Headquartered in Hiawatha, IA. 319.362.9548, info@halleng.com