Heavy rains in the last two weeks in Ottawa's west end caused some basements to be flooded with sewage water. (Johnny Keogh/CBC)

The repairs required to fix the sewer system in Ottawa's west end could cost the city as much as $30 million, says one Kanata-area councillor.

Marianne Wilkinson, the councillor for Kanata North, said Tuesday that the pipes in Kanata's Glen Cairn and Beaverbrook neighbourhoods should be replaced.

At the end of June, residents in Glen Cairn and nearby Stittsville reported flooding in their basements that led many to drag soggy piles of belongings out onto their front lawns.

And in 2006, residents in Kanata North reported watching sewage overflows seep into their homes.

Flooding and sewage overflow in Kanata has a west end councillor calling for the city to replace the neighbourhood's pipes. (Johnny Keogh/CBC)

"The sewer system has to be upgraded in order to provide a very strong possibility of no one getting flooded," said Wilkinson.

"You have to see what has to get done first," she said, but the project could cost the city millions of dollars.

"We can't guarantee that nobody ever will, because we could get even bigger storms than we've already had," said Wilkinson. "But, there are things that can be done that will mean that it becomes a rarer situation — it's becoming quite regular."

Bill Teron, an urban planner who was responsible for much of Kanata's development as it was being built four decades ago, said the City of Ottawa is well aware of the work that must be done on Kanata's sewer system.

"I daresay that if you get to the engineering department, they know the problem," said Teron.

"They know the problem intimately. They know it well. It's been studied well enough that the big problem is known."

Teron said he thinks a major pipeline might have to be installed to direct excess water away from Kanata and toward a major body of water, such as a river.

Lory McCafferty , who lives on Dundegan Drive in Kanata, said getting rid of some of the water in Kanata would help residents along his street feel more at ease.

"I'm nervous, very nervous," McCafferty said Tuesday as he watched more rain fall in his neighbourhood.

He said the flooding he saw in his basement two weeks ago has him thinking about installing a backflow valve.

"I have to make sure that my house is protected, so I'm going to do everything I can … independent of what the city does."

The City of Ottawa said it's currently studying the water problem in Kanata to see exactly where the work might need to be done.

Wilkinson said she hopes construction would begin as early as the fall.