The water that leaked into a Com substation Thursday.

The water that leaked into a Com substation Thursday, causing outages and momentary power los from end to end the Loop, didn't come from a 4-inch pipe have a title toed by the CTA, city officials said Friday.

The city's Water Management Department originally stated that the 4-inch pipe, which attends a washroom facility in the subway, appeared to have ruptur sending water rushing into a Com substation at 121 N Dearborn about 3 pm Thursday.

Three buildings in the turn lost power for 20 minutes or more. The most numerous seriously affected, 20 S. Clark, was knocked abroad for seven hours.

Several other downtown buildings experienced momentary power flickers, including City Hall and the Daley Center

Com and Water Management now say they don't know where the water came from or on what account it leaked. One possibility is that excavation from the stop up 37 construction project triggered a leak, Water Management spokesman Tom LaPorte said.

mjthomas@suntimes.com

...