Comprehensive machine contracting! Kone- ja Vihertyö Haapa-aho Oy is a civil engineering company operating in the Oulu economic area. We offer comprehensive machine contracting with more than 20 years of experience! The most important thing for us is a satisfied customer and the best work result. Our long experience is an asset, but above all we are known for reliable and flexible operations. The best partners are also guaranteed by successful contracts, for example in soil deliveries. Our customers are municipalities, cities, companies, associations and private individuals.