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  • Daniel Nugent-Bowman
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  • Apr 14, 2010 - 10:46 AM
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Landslide risk rattles residents

Unstable Leda clay sits near future Prince of Wales widening

Landslide risk rattles residents. A planning map shows the future four-lane Prince of Wales Drive intersecting with the future Standherd-Armstrong bridge, near the Chapman Mills Conservation Area.

The expansion of Prince of Wales Drive from Fisher Avenue to Fairpark Drive in south Nepean may be years away, but if the latest open house is any indication, planners still have a lot to consider before its completion.

The Prince of Wales Environmental Assessment conducted its third open house at the Nepean Sportsplex on April 6 and 7 to collect input on the proposed widening of Prince of Wales Drive to four lanes from two starting in 2016.

With preliminary designs on display, planners heard a plethora of concerns from the few dozen residents in attendance.

At the forefront of the agenda were environmental concerns.

Because the land surrounding Prince of Wales Drive is a soft form of clay, known as Leda clay, residents are worried about it possibly sliding into the Rideau River and altering the water quality during construction – expected to be completed by 2022.

“That’s a real concern especially from people on the waterfront. There’s been a history of landslides,” Virginia Atkinson said, who’s lived off of the Nepean Creek near Fisher Avenue since 1961.

“I think the overall feeling is that we’re a little defensive.”

“They’re going to have to justify that there’s not going to be any more slides into the river,” added Malcolm MacDonald, who also lives near Fisher Avenue.

Senior project manager with the city Valerie Bouillant confirmed that a geological survey to test the strength of the clay will be scheduled as part of the plan.

“We got lots of good constructive comments that are going to help us tweak the design a little bit and make it a better plan for property owners along the corridor,” she said.

Even with some of the public’s apprehension, this extension is a necessity, said Bouillant.

According to the Origin Destination Survey, the population of Barrhaven and the south urban community is expected to nearly double by 2031 with four times the amount of jobs.

Bouillant added that plans were based on 70 per cent of those people commuting by driving.

“If we were to leaving Prince of Wales the way it is and not do anything, it’s simply not acceptable because of what we know,” she said. “If we didn’t do anything the situation would be much worse in terms of traffic.”

As a result, the right-hand turn lanes will be lengthened north and southbound at West Hunt Club Road beginning in 2016.

However, main construction will start at Fairpark Drive to Merivale Road at the south in 1.5 to two kilometre blocks heading northward no more than once a year, depending on funding.

Bouillant said the hope is to get the city to realize that further expansion needs to happen further north of Fisher Avenue to avoiding bottlenecking.

“That’s one of the main points that we are putting in our report,” she said. “Fisher from Prince of Wales going north was outside of our study and we definitely recommend that the city, as part of the next transportation master plan update, look at that area in particular and how traffic forecasts will be in 2031 and what is the best way to receive the traffic that will result from the widening of Prince of Wales.”

Another potential problem involves the railway bridge north of West Hunt Club Road.

A temporary bridge will be built just to the north of the current one so Via Rail trips will not be disrupted, but the bigger concern is on impact of the land.

“The design of the future bridge will definitely have to consider the soil,” Bouillant said. “There will be special soil investigations done at a depth much deeper (than for a road).

“It’s part of our engineering, but it’s not something that will prevent us from reconstructing the bridge.”

Other project highlights include:

-         Lowering the speed limit to 70 kilometres per hour outside of the Greenbelt

-         A two-metre cycling lane

-         2 ½-metre paved shoulders

-         A multi-use recreational pathway along the Rideau River to Hog’s Back Road

-         Two-metre sidewalk from Winding Way (north) to Holborn Avenue on the east side and from northern Greenbelt boundary to Fisher Avenue on the west side

-         Traffic signals, one on Winding Way and one on Victory Hill

-         Enhanced stormwater measures

-         Noise attenuation with noise barriers

The last point was questioned by Adriano Dirienzo, who lives off of Amberwood Crescent just south of Colonnade Road, a stretch of road not covered by noise barriers.

“We’re going to review our noise attenuation measures and look at properties that are indentified that are just below the threshold,” Bouillant said.

Because of all the comments that were accumulated over the two-day period, Bouillant and her staff will now head back to the drawing board.

“What we’ll do over the next couple weeks is compile all the comments that we’ve received per section and per location and consider them in our design to the extent that we can,” she said.

Bouillant also is planning to follow up with community associations and those individuals with specific problems.

The project was originally supposed to extend all the way down to Woodroffe Avenue at the south, but has since been included in the Strandherd Drive extension project, which commences this year.

Construction from Woodroffe Avenue to Fairpark Drive will start in the coming weeks.

daniel.bowman@metroland.com




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