Firefighters rescued a naked 51-year-old woman from a flood control wash over the weekend, officials said Tuesday.

Covina police offiicals said the Covina woman was flown by helicopter to Los Angeles County-USC Medical Center, however her injuries were ultimately not believed to be major, officials said. She was also taken to undergo pschiatric evaliation.

Authorities received a call shortly before 9 p.m. Sunday of a naked woman running around in the area of Hollenbeck Avenue and San Bernardino Road, Covina police Lt. Tim Doonan said.

Officers went to the area but could not find the woman, he said.

A short time later, police received a report of a nude woman being carried along in the shallow waters of a flood control wash, and officers spotted her in the wash near the Azusa Avenue overcrossing, Doonan said.

The wash is lined with slippery algae and the water within it, though not more than a foot deep, travels at about 15 mph, making it extremely difficult to get out of, police said.

Los Angeles County Fire Department firefighters managed to get a rope down to the woman near Vincent Avenue and pulled her to safety.

She appeared bruised and scraped due to her trip down the wash, but was not believed to have suffered any life-threatening injuries.

Officials also placed the woman on a 72-hour psychiatric hold, Doonan said.