The streets of any new subdivision in the City of Calgary are designed with a Stormwater Management Plan to handle severe rain storms. So as not to overload the underground pipe system during a rain storm, temporary stormwater storage sites called Trap Lows are designed into the streets, lanes, and even parks to accommodate a high volume of water. The Trap Low Design is a requirement of the City of Calgary Wastewater and Drainage Division.
Do not panic if you see water rising in your street or even in your driveway during a fast rain. As long as when building your house and installing the landscaping you have followed the grading plan, the water will flow to the Trap Low before reaching your home.
Once the storm is over the water is designed to drain slowly into the catch basins using a mechanism called an ICD. The reason for this is to prevent the storm system from getting overloaded too quickly. You should see the water draining away.
If the Trap Low still does not drain at this point it may be likely due to debris plugging the ICD. If that is the case please contact Qualico Communities to have the blockage cleared.