For the Want of a Nail - Embedded.com

For the Want of a Nail

With a 300-foot section of an earth-and-concrete levee on New Orleans' 17th Street Canal gushing water into Jefferson Parish yesterday authorities called on a higher power — engineers.

While the politicians stand behind rows of microphones and survey conditions from the safety of the air, a small group of engineers are valiantly trying to fix a 300 foot wide breach in the levee. It appears there’s no standard way to plug such a huge failure, and the engineers are trying old methods and inventing new ones.

According to the New York Times 22 pumps distributed around the city normally run at nearly full capacity all the time to keep this sunken city from flooding. All the time . Just Katrina’s rain would have overwhelmed these machines. Certainly a 300 foot levee failure is far too much for that handful of already-stressed pumps.

It’s hard to find much information about the cost of New Orleans’ hurricane protection system, but www.house.gov/jefferson suggests that a handful of millions were needed to maintain and enhance the levees and pumps. It appears these are federal funds, as usual; surely Jefferson is spinning in his grave at about 5000 radians per second.

Surely, though, a city dependant on pumps for its very survival, which on a good day uses essentially all available pumping capacity, lives on the very precipice of existence. Surely engineers must have been screaming for more capacity. And just as surely those demands were lost in the orgy of infighting that passes for politics today.

It’s easy to argue that building a city below sea level is a Bad Idea. But no one has ever – till this week – seriously suggested abandoning New Orleans. Given the decision to continue battling entropy, one would hope there’d be margin in the system.

Strong storms are reputedly rare. The New Orleans levee project’s web site is down, but a mirror at Orleans Levee Archive claims hurricanes will come within 80 miles of the city as follows:

Category 1 Storm once every 8 years
Category 2 Storm once every 19 years
Category 3 Storm once every 32 years
Category 4 Storm once every 70 years
Category 5 Storm once every 180 years

Yet Cat 5 Camille roared ashore just a few miles east in 1969. Ivan, a strong Category 4, barely missed last year. And Katrina has now destroyed the place. Maybe these numbers need revision.

A prescient paper wonders what would have happened if Ivan had made landfall in the Big Easy, and concludes rebuilding could cost up to $100 billion . That number happily appears very high, but the surely many billions will be required.

I can't help but be amazed that, as usual, there’s plenty of time and money to do the job right the second time. The parallel to engineering organizations is uncanny. Too often we rush an incomplete and frankly unacceptable product to market, only to later issue an expensive recall and initiate an even more expensive redesign.

I do wonder if the international community will pour out aid as we did for the tsunami last year.

Meanwhile, visit www.redcross.org to send aid.

Thanks to the many readers who inquired about my son, who just started college there a week ago. He escaped with just a backpack. Presumably the carload of stuff we brought to his dorm room is watery rubbish, but stuff can be replaced.

Jack G. Ganssle is a lecturer and consultant on embedded development issues. He conducts seminars on embedded systems and helps companies with their embedded challenges. Contact him at . His website is .


Thank you for your editorial about New Orleans, and my best wishes to yourson. Atypically, I was in agreement with most of what you said, until I gotto the part about rebuilding.

A prescient paper wonders what would have happened if Ivan had made landfallin the Big Easy, and concludes rebuilding could cost up to $100 billion.That number happily appears very high, but the surely many billions will berequired.

It would be hypocritical and disingenuous to all those that have worked tobuild the EPA, HUD, building codes, OSHA and other standards organizations,to suggest that we should restore New Orleans on its present site. For allthe complaining that people make over these regulations, setting next-levelstandards is what has brought this country to where it is. It is highstandards that embody our “lessons learned” and enable us to “do it right”the second time. It is enforced standards that keep the Cayahoga river fromburning and Love Canal from poisening more children.

New Orleans, as it exists at this moment, is a magnitude beyond anySuperfund site. If an industrial accident brought one acre of land to thelevel of contamination that will be exposed when the waters are drained,corporate managers would be imprisoned! Yet now, so many people areassuming that we will allow living people, our fellow Americans, to returnto that toxic cesspool.

Whatever changes are in store, we have the unprecidented opportunity toengineer the harbor, river, lake, docks and access routes to our advantage.

– Kevin Kilzer

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