Environmental Protection Agency (EPA) National Service Center for Environmental Publications
Searches EPA's technical reports and other publications, including test methods and over 33, 000 environmental publications

US Geological Services (USGS) Publications Warehouse
Goes back to 1880 and has over 40, 000 full text reports, as well as citations for over 70, 000 reports.  If you can't get the USGS report you need here, contact your librarian, we may have it in the library.

USGS Water Resources of the United States
Data, publications, maps and other water information collected by state. 

OSU Libraries owns most of the reports distributed by the National Technical Information Service (NTIS) since 1963. The NTIS report collection is on microfiche on the 3rd floor of the Valley Library.  Some of the reports are available in print or online. Not all of the reports that OSU Libraries have access to appear in the OSU Libraries' 1Search.

Search NTIS publications

Oregon Department of Environmental Quality
Oregon DEQ is a regulatory agency with responsibilties to protect the quality of Oregon's environment.Links on this web site of particular interest are the Publications and Fact Sheets, the Databases (including water quality).  There are also links to laws and regulations and to permits and licenses. 

For images of Oregon's landscape over time, see the OSU Archives Flickr Collection, especially the Oregon 150 Basins collection.

Clackamas River Dam, image courtesy of OSU Special Collections & Archives Research Center, Past and Future of Forests Flickr Collection