We had a meeting with small craft harbours people--I believe it was last fall or through the winter sometime--and I asked what it would cost for an extension. The reply I got was $1,500 to $2,000 a foot. That was just somebody at small craft harbours. Now, as for whether it's a little more or less, I'm not an engineer, so I can't say.
On April 16th, 2008. See this statement in context.