From the U. S. Geologic Survey. “The Volcano Hazards Program monitors active and potentially active volcanoes, assesses their hazards, responds to volcanic crises, and conducts research on how volcanoes work to fulfill a Congressional mandate (P.L. 93-288) that the USGS issue “timely warnings” of potential volcanic hazards to responsible emergency-management authorities and to the populace affected.”–From the website.
American Society of Civil Engineers 2013 Infrastructure Report Card on United States Infrastructure.
Urban Land Institute and Ernst & Young: 2013 Infrastructure, Global Priorities, Globa Insights. Includes information on U. S. infrastructure plus information on the infrastructure of countries from around the world.
10 Pieces of U. S. Infrastructure We Must Fix Now, from Popular Mechanics
Council on Foreign Relations: Encouraging U. S. Infrastructure Investment, Policy Innovation Memorandum no. 17 (Can be downloaded from the site).
InfrastructureUSA : Advocating to Restore America’s Infranstructure.
A database of “useful biological numbers,” complete with a search engine and full citations. If you need to know how many skin cells the human body has or the estimated number of insects on the Earth at a given moment, then this resource has what you need.