George Mason University
Chnm: Critical Infrastructure Protection Oral History Project
Project documents the history of the nation's efforts to protect what has come to be called critical infrastructure--the systems and structures that are vital to the smooth and safe functioning of our economy, society, and way of life.
CK-12 Foundation
Ck 12: Physical Science: Electrical Grid
[Free Registration/Login may be required to access all resource tools.] Explains what an electrical grid is and the role of power plants, transmission lines, and electric substations.