Dammed water a drop in a bucket in flood

Our two lakes are very small and even if they were to lose their water, it would not be instantaneous.

To the Editor,

Re: Colliery dam risk lowered, May 29.

In 2012 city council was told that the Colliery dams were in such poor condition that there was a 40 per cent chance in 50 years that they would fail in a manner that would cause swaths of destruction in lower Harewood. Thanks to the most intensive analysis that may ever have occurred on a dam in B.C. we know that this is not the case. At most, an earthquake could cause cracking and they could leak. We are now left with dealing with a hypothetical flood event. Despite studies showing that the spillways are undersized, our dams have successfully managed storms over the last century. For much of the year we have about 2.5 centimetres of water or less in the spillway and very rarely have more than 0.3 metres.

An enormous flood event that could impact  the dams would occur over many hours or days.  Should an event like this occur, there would be large-scale flooding in most of Nanaimo with a great deal of damage. This is unrelated to our dams. Our two lakes are very small and even if they were to lose their water, it would not be instantaneous and would have little overall impact.

As for the signage, our society has asked repeatedly for them to be removed. We consider them to be a blight in our community with no actual benefit.

Jeff SolomonColliery Dam Park Preservation Society

 

To the Editor,

Re: Extreme weather will stress our dams, Letters, June 12.

In the two extreme rain and snow events the letter writer mentions, none of this fear-mongering erosion has happened. No cracks found, either.

But speaking of cracks in concrete, they are very dangerous. I’m speaking as a man that has done a lot of commercial concrete form work, pouring concrete and seeing the results. A cracked wall or floor will not pass, usually caused by stripping the forms too soon on green concrete. Nanaimo now has this problem at the new reservoir at Colliery Dam Park.

Yes, leave the flood signage in place, because if we get the big one I’ll be betting the new reservoir will fail long before the old dams.

Neil SaundersNanaimo

Just Posted

Historian happily surprised about Morden Mine funding

What took so long for support for restoration work, asks columnist

Lantzville looking to ban beach fires as youths aren’t respecting beaches

Lantzville the only municipality south of Comox Valley that allows beach fires, district staff say

NDSS 50th reunion planned this spring

Organizing committee looking to reach Nanaimo grads from the Class of 1969

VIDEO: Duncan-Nanaimo’s Funkanometry bow out of ‘World of Dance’ with ‘After Hours’ routine

Judges praised them as entertainers, and urged them to work a bit more on their dancing

VIDEO: Next up on World of Dance: Vancouver Island’s Funkanometry faces ‘the cut’

Duncan’s Carlow Rush and Nanaimo’s Jacksun Fryer have passed the qualifying stage chasing $1 million

What’s age got to do with it? B.C. couple with 45-year gap talks happy marriage

An Armstrong couple that has 45-year age gap began turning heads after being featured on show Extreme Love.

Upgrades planned for Gabriola ferry terminal

Plans call for new loading ramp, creation of a vehicle holding area and new terminal building

Earth Day in Nanaimo celebrates the Earth and its inhabitants

Plant a tree, pet a wolf, and see grand opening of Georgia Greenway at Nanaimo Earth Day festival

City of Nanaimo ‘100 per cent’ on board with privacy commissioner recommendations

Council satisfied with how private and confidential information will be handled moving forward

Editorial: Climate change is a good reason to cast a vote

Different choices around climate action and inaction will be on the ballot in Nanaimo-Ladysmith

WATCH: South Vancouver Island shooting an ‘isolated and targeted’ incident, say police

One person in custody, another fled following shooting and crash on West Shore

Defence accuses officer of ‘incompetence’ in trial for B.C. man accused in daughters’ murder

Double murder trial for the Victoria father accused of killing his two young daughters continues

Fisheries and oceans minister spends Earth Day in Nanaimo-Ladysmith

Jonathan Wilkinson in riding to support candidate Michelle Corfield

Climate action can’t be a partisan issue, say Greens

Green Party of Canada celebrated Earth Day early in Nanaimo

Most Read