The man in charge of the Port of Houston said Monday that he is not staying on the job much longer.

A Houston television station accused Port of Houston Chief Executive Officer Alec Dreyer of using the port's tour boat for a personal party in April 2010 and then falsifying documents to cover it up.

"I knew those weren't correct and I wanted someone to clear my name," Dreyer said.

He asked the Harris County District Attorney's Office to investigate the allegations.

Last week, the district attorney's chief of public integrity issued a letter stating that the investigation found no criminal conduct by Dreyer.

"I've been fully exonerated," Dreyer said. "My actions were totally appropriate with Port procedures."

Investigators also found nothing illegal with Port Chairman James Edmonds' business relationship with a port vendor.

Despite those results, Dreyer said he won't be staying on the job. He plans to leave at the end of his contract next year.

"I can't implement what needs to be done because of politics getting in the way," he said. "Quite frankly, that's not something I want to fight. It's not my preference to do that, so I'd rather go do something else."

Harris County Judge Ed Emmett agreed that Dreyer's decisions on the job have ruffled some feathers.

"He's probably done a lot to clear up a lot of the problems in his tenure out there," Emmett said. "That's kind of the sad thing about this entire incident."

Last September, the county attorney criticized the Port Authority's policies on open meeting and employee pay, among other things. Those policies are now under review.

The Port of Houston is a for-profit enterprise. About 20 percent of its budget is funded by tax dollars.