Spikes In River Rocks Could Maim Boaters, Swimmers Two Boats Damaged By Nails TROUTDALE, Ore. -- Police want to know if someone is deliberately trying to sabotage boaters on the Sandy River by spiking underwater rocks. Since December, two boaters reported that their rafts were torn by nails sticking out of rocks -- one near Dodge Park and another downstream at Indian John Island. Boaters and police say it could be a case of eco-terrorism. "The heads were cut off, they were sharp, they could really rip someone's arm or leg or whatever," Val Shaull of the Oregon Whitewater Association told KOIN News 6. "It's very upsetting. It could hurt someone or kill somebody -- at least cause damage to equipment." Clackamas and Multnomah county deputies are investigating. "A lot of people get trapped out here on this river already. This is one more item we don't need out here," Clackamas County Deputy Doug Olsen said. If the nails were to cause a drowning, the suspect could face manslaughter charges.