Imprint Support Sitemap Contact Home Job market Products manufacturing sales information material Geology reuse children www.kies-sand-natursteine.de Current opening hours The company history group of companies Forms August Oppermann Kiesgewinnungs- und Vertriebs-GmbH Natural building materials are required in all construction areas and are indispensable for the construction industry. Our products are the prerequisite for civil engineering and traffic route construction. Without gravel, sand, limestone and greywacke there would be no schools and kindergartens, no roads, bridges and tunnels, no railway lines, no airfields, no sewage treatment plants and much more. Around 263 - 277 million tons of gravel and sand alone are produced for this nationwide every year. But not only humans but also flora and fauna benefit from the breakdown of natural building materials. In our factories, niches are created for many endangered species during mining. Current information & announcements Emmenhausen: The sale of limestone will cease on July 17th, 2020. ( PDF file ) Customer information on the corona virus