Stone Trap | Solids Bunker | Tailings Bunker


Stonetraps with tailings bunkers are an ideal effluent management option for lower cow numbers and areas that have high water tables with restricted options of infrastructure.

Systemised stone trap, an ideal effluent system

Archway Groups Stone Trap and Tailings bunkers work in together as a system. Keeping all the effluent contained the tailings bunker allows the Stone Trap to be cleaned and the tailings rested for drying and makes dealing with the solids a lot easier and less labour intensive. Both the stone trap and the tailings bunkers are sized according to area, solids produced and what is being fed and how the area is washed.

Stone Trap Details

  • 30m3 capacity for stones at the back

  • 40m3 of storage to accommodate for floodwash

  • 9’ slope for safe and ease of cleaning

  • Entry and exit point located precisely

  • Liquids from the tailings bunker designed to run back into the stone trap

  • Usually combined with a sump sized accordingly


“We farm 460 cows on the Pukehina Flats where it is very wet and are limited to what we can do. We really wanted to put in a Weeping Wall but Matt talked me out of it because of the issues around water pressure and building such a structure in the peat. We have a 12mx4m stone trap and only have to empty it every couple of months. It goes to show if you have a decent stonetrap and you manage it, it works really well.”

-Errol Watts, Cutwater Road, Pukehina