Six On Your Side first exposed a problem with a traffic control device last week in a southwest Omaha neighborhood. It wasn't marked and caught drivers off guard. That was just the beginning.

Not all drivers had to be speeding for speed bumps to cause vehicle damage near 178th and Orchard. Chuck Christensen paid $436 to repair his wife's van that she had been driving under 25 miles an hour.

“Now we come to find out that the speed bumps weren't (built) to spec either.”

Speed bumps should be no more than four inches above the pavement, but two newly installed in the Hawthorne subdivision are more than seven inches high. A third is almost an inch above code.

“Contacted the consulting firm and verified by survey that they were too high and informed the contractor they must come out,” says Deputy Douglas County Engineer Dan Kutilek.

There's a different issue with the third speed bump, poured right at the handicap ramp for a sidewalk leading to a park. Residents say you don't have to be an engineer to question placement of a speed bump there.

“In a wheelchair or bike, kids in strollers, anything, you can't cross there,” says Barb Cook.

“They are going to look at the walk and see if they can lessen the severity of the bump."

Before warning signs went up, some drivers were caught off guard. That launched an engineering investigation showing that the speed bumps were built too high.

“If you're just going 20 miles an hour and didn't know it was there, it'll catch you off guard and do damage at seven inches tall,” says mechanic Joel Haver.

So Chuck say his $436 repair bill sent to the project consultant should move fast through the claim process.

The speed bumps fall within the city's three-mile jurisdiction. Omaha's traffic engineer tells Six On Your Side he's ordered that all three be replaced.

The traffic engineer says the SID is withholding payments to Navarro Construction until the work is done right. Navarro has not returned our call.