Basic sewer plan and Blue Vein Plan.

The Blue Vein Plan is considered an extension of the Basic Sewerage PlanBRP), and is a long-term vision for handling stormwater and constructing closed stormwater systems. This analysis was conducted to identify areas where there is potential for infiltration of stormwater. At a number of locations within the municipality it is then possible to construct a so-called 'Blue Vein'.

With a "Blue Vein," a large stormwater sewer is laid in the ground, which can then store, infiltrate and/or drain a large amount of stormwater. When sewers are renewed in nearby streets and a separate system is installed, the rainwater sewer is connected to the Blue Vein. This will make the system increasingly resistant to flooding and ensure that rainwater is no longer immediately discharged to the treatment plant.