Philip Wood/The Telegraph
Folsom's water pipeline from Folsom Lake collapsed on itself Thursday morning as a vacuum was created inside it when it was being dewatered.

Philip Wood/The Telegraph
Folsom's water pipeline from Folsom Lake collapsed on itself Thursday morning as a vacuum was created inside it when it was being dewatered.

Philip Wood/The Telegraph
Folsom's water pipeline from Folsom Lake collapsed on itself Thursday morning as a vacuum was created inside it when it was being dewatered.

Philip Wood/The Telegraph
Folsom Mayor Steve Miklos, left, City Manager Kerry Miller, center, and Assistant City Manager Evert Palmer survey Folsom's collapsed water pipe Thursday afternoon near Folsom Dam.

Philip Wood/The Telegraph
Folsom Mayor Steve Miklos, back, and city Utilities Director Ken Payne discuss the city's collapsed water supply pipe Thursday afternoon near Folsom Dam.

Philip Wood/The Telegraph
Folsom Mayor Steve Miklos addresses the local media at press conference Thursday afternoon about the city's water supply pipe collapsing.

Philip Wood/The Telegraph
About 300 feet of Folsom's water supply pipeline was damaged Thursday as it collapsed on itself.