Another huge wave came across Lake Pontchartrain in the north. It sent a steel barge ramming through the Industrial Canal, a major shipping artery that cuts north to south through the city, possibly creating a breach that grew to 500 feet, letting water pour into nearby neighborhoods of the city's Ninth Ward.The barge's remains were found lying on the bottom of the gap. An early eyewitness reported seeing the barge smash through the levee. His report was never followed up by the media.
http://www.newsmax.com/archives/articles/2005/9/12/210912.shtml
That article doesn't contain the string "17" so is not a good cite for the proposition that a barge was involved in the 17th Street canal.
You recent post is the first that I have seen mention a Florida Av break. My impression is that a total of 5 breaches occurred, and those were confined to the London Street Canal, Industrial Canal, and 17th Street Canal.
Florida Av = Industrial Canal, sorry.