Construction crews are dredging the Mission Bay channel to make it safer for boaters. The sand is being redistributed on a nearby beach. But it's not just sand being spread along the shoreline.
The U.S. Army Corps of Engineers is overseeing the dredging project in the Mission Bay Channel.
The dredging will increase the depth of the channel to reduce the breaking waves during large ocean swells making it safer for boaters.
The sand dredged from the channel is pumped through black pipes to parts of Mission Beach.
"Overall the sand seems compatible and fairly clean but there have been some sharp metal objects popping up that could pose a safety hazard to beachgoers," said Bill Hickman with the San Diego Chapter of the Surfrider Foundation.
Hickman said he has talked with the Army Corps of Engineers about sifting the sand more thoroughly.
"So it does seem to be getting better but we're still concerned with what might be buried in certain areas," said Hickman.
He said some of the objects he found sticking out of the sand included old aluminum cans and fishing gear.
Hickman said while the screening process has improved he will continue to monitor the project.