No person shall throw, dump, place or allow to be thrown, dumped or placed, any rubbish, refuse or any article or thing in any ditch, lateral, canal, slough, waterway or conduit constructed, operated or maintained under the provisions of ORS 549.310 to 549.390, or befoul, pollute or allow to be befouled or polluted any such ditch, lateral, canal, slough or conduit.
Oregon Legal Code