At sometime between 2pm and 3pm on Saturday October 13 a Super Silent water pump was taken from the site on the junction of Hillam Lane and Betteras Hill Road.
The pump is bright yellow and measures approximately two metres by one metre by one metre.
Two or three white men, wearing high visibility vests and blue overalls, were seen loading the pump onto the trailer of a lorry using the vehicle’s crane and driving off in the direction of Hillam village.
The men were white and between 5ft 10in and 6ft tall.
Officers are appealing to anyone who witnessed the incident or has any information about the theft to contact them with information.
Anyone who can help officers with their enquiries is urged to contact North Yorkshire Police and ask for PC Tom Jordan or Selby police.