(Tygh Valley, OR) -- Oregon State Police are asking for tips to identify who contaminated a pond in Tygh Valley. Last month, troopers found multiple cans of spray foam near a small pond bordering the White River Wildlife Area. The cans were broken, and left for several days, allowing foam to leak into the water. A 300-dollar reward is offered for information leading to the identification of those responsible. Tips can be submitted by email or phone to OSP's Turn In Poachers tip line.