When the conditions for stormwater management do not allow to discharge the whole waste coming from the Investor’s area to the public stormwater system, the construction of retention basin has to be considered. The design and construction of such a basin depends largely on soil conditions, amount of water, possibility of discharging to the public network, etc.

On the plot belonging to the Shipment and Sorting Hub (WER) of the Polish Post Office in Lublin, a 1,200 m3 open-air retention basin was designed and built. The specificity of this project lied in combining the function of a retention and evaporation tank with a fire protection tank.

The basin was commissioned in 2010.


  • Construction management
  • Investor’s Technical Supervision