Seveso. Vasca Milano-Parco Nord, construction site has started. The entire plan for the prevention of flooding of the Seveso in the metropolitan area has been launched
Seveso. Vasca Milano-Parco Nord, construction site has started. The entire plan for the prevention of flooding of the Seveso in the metropolitan area has been launched
Councilors Foroni and Granelli: "Concrete answers after 50 years of waiting". The pond will be built in the summer of 2022 and is part of a system to contain river flooding in Milan
Milan, July 20 2020 - Construction began today for the flood containment tank of the Seveso river located in the Parco Nord in Milan. It is one of the tanks in the Seveso flood prevention plan and is part of a complex plan approved and financed in autumn 2015 and now under implementation.
The end of the works is scheduled for the summer of 2022 when the artificial lake will be completed. The works are carried out by MM SpA.
All the activities for the construction of the flood lamination areas on the Seveso torrent are also continuing, to protect the flood zones of Brianza, the metropolitan city and Milan. Despite the difficulties linked to the ongoing health emergency, the tenders for the main works continued and work on the construction sites already underway resumed.
“After 50 years of waiting – underline Pietro Foroni, Councilor for Territory and Civil Protection of the Lombardy Region, and Marco Granelli, Councilor for Public Works of the Municipality of Milan – concrete answers to prevent floods and protect the coastal areas of Brianza and the City underground, six districts of Milan (Niguarda, Pratocentenaro, Istria, Maggiolina, Marche, Isola), tens of thousands of citizens, hundreds of businesses and businesses exposed to the risk of flooding of the Seveso".
Specifically, the Lombardy Region and the Municipality of Milan are renewing and intensifying full institutional collaboration with the Po River District Basin Authority, with the Interregional Agency for the Po River (AIPO) and with the Metropolitan City for the implementation of the Metropolitan Areas Plan started in 2015 and to implement the provisions of the Seveso River Contract for the hydraulic protection and ecological-environmental redevelopment of the river and its tributaries. An overall plan for 142 million euros for Seveso of which 112 from the Government, 20 from the Municipality of Milan, 10 from the Lombardy Region. To these must be added another 23 million euros from the Lombardy Region for the strengthening of the north-west drainage canal (the one that starts from the Seveso between Paderno Dugnano and Palazzolo) and another 7,6 million arrived from the State in 2019 to consolidate the Redefossi ( the underground canal where the water from the Seveso flows into Milan).
Overall more than 170 million euros for concrete projects.
Two works have already been completed: the adaptation of the north-west spillway, carried out by AIPO, and the consolidation of the covered section of the Seveso in Milan, carried out by MM.
The already contracted works of the Senago (MI) lamination area on the north-west spillway canal (CSNO) have resumed and continue at full speed, which will allow the doubling of the flow discharged from the Seveso to Paderno Dugnano-Palazzolo and will simultaneously also laminate the floods of the Pudiga and Garbogera torrents. AIPO, which carries out the functions of contracting authority for the works in the medium-upper part of the Seveso basin, also has in its final phase the tenders for the so-called floodplain areas in the municipalities of Cantù, Carimate and Vertemate con Minoprio (CO) and rolling area of Lentate sul Seveso (MB). Both of these works, in addition to locally defending the inhabited areas along the Seveso in the Como and Brianza areas, contribute significantly to the lamination of the flood wave to defend the valley areas, to achieve the objective of eliminating the centennial flood in Palazzolo hydraulic node. If there are no hitches or appeals on the tenders, it is assumed that the works on the floodplain areas will begin by the end of the current year while those in Lentate sul Seveso will begin in spring 2021.
The reclamation project for the site where the Paderno-Varedo rolling works will be carried out is also ready and in the approval phase for the start of the tender for the works. This project, in addition to laminating the floods of the Seveso, will contribute - also thanks to the new law on urban regeneration - to the environmental redevelopment of the former SNIA area of Varedo, abandoned and degraded for decades, returning part of the area itself to a park citizen usable during periods of non-use as a hydraulic work for rolling. Also in this case the executive design of the hydraulic and environmental requalification part is being entrusted to AIPO and will be completed by November. The reclamation works could start in the first months of 2021.
The overall picture of the works is completed by the construction of the Milano Parco Nord lamination tank, a fundamental work for the lamination of the floods of the Seveso torrent which form downstream of the Palazzolo hydraulic node and which alone can create further flooding in the Niguarda district in Milan, as the latest flooding events of 2019 and 2020 have demonstrated.
The Milano-Parco nord pool
The area of the North Park, close to via Aldo Moro, was identified for its proximity to the entrance to the Seveso river siltation in the city. This will allow immediate use in case of need, containing the floods that form south of the north-west drainage channel and preventing the water from seeking an exit through the manholes (for example in via Ca' Granda, Istria, Zara ) flooding and muddying streets, squares, gardens, cellars and shops.
The artificial lake will above all be a recreational place with cycle and pedestrian paths at different heights, surrounded by greenery and woods which will be expanded with new trees, suitable for the nesting of water birds. It will be fed with clean groundwater and continuously moved to promote oxygenation, avoid stagnation and the proliferation of algae.
In the event of exceptional rainfall and flooding, on average six times a year, the basin will be able to fill with river water which, before entering the basin, will be cleaned of branches and other materials thanks to a system of grates. The water will remain in the tank for the time of the Seveso flood and will then be reintroduced into the river. The basin will be cleaned and refilled with clean water. The process lasts a total of 48 hours to five days to allow for complete replacement.
This complex system is safe for citizens: access to the lake is under video surveillance and, during floods, some automatic barriers will prevent entry and variable message panels will communicate the alert to citizens who wish to enter.
To compensate for the construction of the flood basin, the public areas managed by the park are expanded to a size equal to three times the size of the basin: if 37 thousand m109 are needed for the basin, the North Park will be given new areas for XNUMX thousand square meters to be made green, permeable and with numerous new trees.
The ruling of the Water Court on 17 July rejected the request for suspension presented by a condominium in Bresso against the works on the tank.
"The North Park is a treasure to be protected and indeed to be expanded – explains Marco Granelli, councilor for public works –. With this intervention we are safeguarding the city's neighborhoods from the flooding of the Seveso river but at the same time we are investing in a green area, building a lake , planting new trees and saving other areas from degradation which will be returned to the community. It has been a long journey but today with the start of work in Milan we are certain that we are closer to freeing the Milanese from a fifty-year-old scourge. ".
To inform citizens about the construction work on the North Park lake, the Municipality has created an information campaign on the web, on social media, with flyers and panels in the neighborhoods involved.
“In the Seveso basin – continues councilor Foroni – all the major structural works have therefore begun to prevent the damage caused by the frequent flooding of the Seveso along its entire course. Finally, I would like to underline that the Lombardy Region also pays the utmost attention to local maintenance and ecological and environmental redevelopment interventions of the stream. In recent years, as part of the Action Plan of the Seveso River Contract, significant economic resources have been committed and spent for the ecological improvement of the watercourse and some tributaries, for the strengthening of purification and for the refinement purification of some dischargers of the urban drainage networks. Also in the coming months, resources will be identified to be allocated to the planning of ordinary and extraordinary maintenance interventions on the entire basin; this testifies to the commitment of the Lombardy Region on this particularly critical and complex river basin due to the strong settlement load, one of the largest in Europe, and for the constant challenge it poses to all institutional levels that work for the resolution and improvement of the territorial and environmental conditions of the basin itself".
cesate - Poster - Panel - Rendering
Hydraulic arrangement of the Seveso torrent
Works for the construction of the Seveso flood containment tank
Updated: 20/07/2020