National Public Radio (NPR) has posted an interesting map visualization of the United States' electric grid. Users can add and remove various layers from the map including existing lines (from 345 - 1,000kV), proposed lines, sources of power at power plants, solar power transmission lines, and wind power transmission lines. Additionally, the map displays the location and production levels of power plants around the United States. In terms of green energy, the map displays potential for wind and solar power as well as the lines in place to transmit that power to users.

From the map' site: "The U.S. electric grid is a complex network of independently owned and operated power plants and transmission lines. Aging infrastructure, combined with a rise in domestic electricity consumption, has forced experts to critically examine the status and health of the nation's electrical systems."

The map's source data are from a range of sources that include: American Electric Power, American Wind Energy Association, Center for American Progress, Department of Energy, Edison Electric Institute, Energy Information Administration, Electric Power Research Institute, Federal Energy Regulatory Commission, National Renewable Energy Laboratory, U.S. Environmental Protection Agency, Western Resource Advocates.

Visualizing the U.S. Electric Grid / Producer: Andrew Prince; Designer: Alyson Hurt; Editors: Avie Schneider
and Vikki Valentine; Supervising Editors: Anne Gudenkauf and Quinn
O'Toole; Additional Research: Jenny Gold; Database and GIS Analysis:
Robert Benincasa