The National Asphalt Pavement Association is the only trade association that exclusively represents the interests of the Hot Mix Asphalt producer and paving contractor on the national level with Congress, government agencies, and other national trade and business organizations. NAPA supports an active research program designed to answer questions about environmental issues and to improve the quality of HMA pavements and paving techniques used in the construction of roads, streets, highways, parking lots, airports, and environmental and recreational facilities. The Association provides technical, educational, and marketing materials and information to its members, and supplies technical information to users and specifiers of paving materials. The Association, which counts more than 1,100 companies as its members, was founded in 1955.
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Images of Natural Hazards from NGDC Marine Geology & Geophysics Division
A collection of geologic hazard photos from the NOAA National Geophysical Data Center (NGDC). Many of these photos were originally 35mm slide sets made available to educators and others. Now you can download them. Only […]
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Geoengineer.org
Excellent and comprehensive website on geotechnical and geological engineering that was established in 2002. Visit Geoengineer.org
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NDT Corporation
Based in Worcester, MA, NDT Corporation provides nondestructive testing services to assess the condition of bridges, tunnels, pipes, and concrete structures and geophysical testing to assess soil and bedrock foundations. Visit NDT Corporation