Water service has been restored for all residents affected by the watermain break on Woodroffe Avenue Friday, city officials say.

A second northbound lane has also reopened. Crews are currently in the process of removing the section of the watermain where the break occurred at about 3:30 a.m. Friday.

The break caused the pavement above to collapse. Four city workers who were in the truck at the time scrambled to safety just before their vehicle plunged into the hole Friday morning. The workers were uninjured.

Minimal health risk

The city says about 11,000 homes in parts of Barrhaven, Riverside South and Manotick were affected by the watermain break and bacteria may have got into their water for a short period of time early Friday morning.

Ottawa Public Health says there is a very small health risk for anyone living in those areas who drank water from the tap between 3:30 and 5:30 a.m.

Those people should seek medical attention if they experience nausea, vomiting or diarrhea over the next few days.

However, the city is ensuring residents that although some areas might continue to experience reduced water pressure and discolouration, the water is safe to drink.

A temporary pumping station has also been set up at the site to ensure that water pressure is maintained in the area.

The city says the watermain was installed in 1976. Although crews are expected to work around the clock to fix the problem, the size of the pipe, freezing weather and a predicted snowfall could delay repairs.

It's not the first time a watermain break caused disruptions in the area. In 2007, a watermain break occurred nearby.

Traffic disruptions

Woodroffe Avenue was closed in both directions between Knoxdale and Hunt Club Roads Friday. Majestic Street remains closed between Woodroffe Avenue and Cheryl Street.

Commuters are asked to avoid the area. OC Transpo riders are also being warned to expect delays on the following bus routes: 70, 71, 73, 76, 77, 95, 157, 174, 186, 188, 195.