Allgas Street Stormwater Disconnection and Riparian Rehabilitation
Logan City Council
E2Designlab led a design and construct contract to deliver a demonstration project illustrating the ecological and landscape benefits of disconnecting stormwater outfalls from a local creek and allowing stormwater flows to re-engage with the creek riparian zone.
The project required subtle re-profiling of the highly modified floodplain geometry to create shallow filtration zones integrated with riparian replanting. These infiltration zones allow stormwater re-directed from stormwater outfalls to flow through groundcover sedge and grass plantings and percolate through native in-situ soil profiles before discharging as interflow to the local creek.
The project team worked closely with the local council to deliver the project using a design, construct and maintain approach that placed emphasis on site based guidance of construction activities in lieu of extensive design documentation. This approach required trust and confidence in the delivery model by the local council making it possible for the majority of the available budget to be expended on built on-ground works rather than on un-necessary levels of design documentation that invariably require on-site adaptation when working with green infrastructure solutions.
Water Sensitive City Outcomes:
- stormwater disconnection
- design and construct delivery model
- enhanced amenity values