30 Blocks of DUMBO Done Over With Artistic Flair?

Being in the PR field, I understand the importance of a catchy headline on a press release. This one offers details on the upcoming under the bridge art festival on Oct 13-15.

Although something seems fishy to me:

"The free three-day festival spans 30 blocks of DUMBO, Brooklyn."

So when have there been 30 blocks in our neighborhood? Maybe 10...

Also I hope this is a very overzealous estimate:

"when an anticipated 200,000 visitors descend on the locality to celebrate the creative ferment of a unique terrain."