Villagers in Buckfastleigh have voted against using a quarry to recycle ash from an incinerator in Plymouth.
More than 1,300 people rejected plans by MVV Umvelt to process the ash at Whitecleave Quarry, with 73 in favour.
The parish poll is not legally binding and Devon County Council will make a final decision in April.
Local people have raised concerns about the safety of the ash, but MVV Umvelt says the materials will be inert and non-toxic.
MVV wants to build the quarry plant to turn the ash into material for road-building and other construction.
About 56,000 tonnes of ash a year would be taken to the plant.
A £140m contract to build an incinerator in the Devonport area of Plymouth was awarded to MVV in January 2011.