N01 / N07 New construction of SABA Kefikerbach (ZH) and Bewangerbach (TG)
Environmental and nature conservation measures
The project
Location: Kefikon (ZH) / Frauenfeld (TG)
Client: Federal Roads Office FEDRO Winterthur branch
Phases: Detailed project, submission, realization and commissioning
Duration: 2023 - 2027
In order to adapt the highway drainage system to the latest state of the art, the Federal Roads Office FEDRO is planning the construction of a total of 8 new road wastewater treatment plants (RWWTP) along the N01 and N07 in the border area between the cantons of Zurich and Thurgau. In a first stage, the SABA Kefikerbach in Kefikon (ZH) and the SABA Bewangerbach in Frauenfeld (TG) were planned. As part of the detailed project, PV Umwelt evaluated the requirements from the planning approval procedures (PGV), carried out in-depth environmental clarifications and optimized the project in terms of its environmental impact. To this end, various inspections were carried out with the cantonal experts responsible for hunting, fishing and water maintenance, as well as the district and district foresters concerned. Based on this, a landscape management plan was drawn up for each SABA with measures for the creation and maintenance of the green areas as well as an earthmoving and recultivation concept. In addition, measures were developed to protect the affected bodies of water during the construction and operational phases as well as replacement measures for temporary clearing.
Environmental project author in the detailed project, submission and realization phases
Evaluation of environmental requirements from planning approval procedures (PGV), planning and implementation of inspections with cantonal specialist agencies such as fisheries supervision, water maintenance, forestry and nature conservation (riparian trees, greening) to coordinate the implementation of requirements
Development of aquatic ecological specifications for the design of discharge structures, river bed and bank design and water protection measures (dewatering, monitoring, crayfish plague, etc.)
Planning of greening and replacement measures (reforestation, restoration of riparian vegetation), development of landscape conservation plans with information on the implementation and long-term maintenance of green spaces
Development of earthmoving and recultivation concepts (soil protection concepts) for construction work, including recycling options for surplus topsoil and subsoil
Development of project-integrated environmental measures and integration into tender documents, tender support for clients and construction management
Environmental construction supervision (UBB) and pedological construction supervision (BBB) during the construction phase
Challenges
Each SABA has site-specific prerequisites and requirements in accordance with the respective cantonal authorities
Due to existing oil retention basins, structural implementation options were limited and challenging
Often small spaces in remote locations with limited access options in some cases and corresponding challenges for construction logistics
Incorporating the needs of the territorial units (responsible for plant maintenance during operation) into the design and construction of technical facilities
Some long connection lines in agricultural land required with corresponding soil protection measures
Scheduling of construction work taking into account relevant closed seasons for terrestrial (vegetation period, bird breeding) and aquatic habitats (spawning season, crayfish plague)
Our solutions
Early involvement and site inspections with responsible specialists from cantonal agencies such as fisheries supervision, water maintenance, district and district foresters to clarify open questions and requirements
Direct and implementation-oriented communication and development of practical solutions
Involvement of the area unit responsible for system maintenance and inclusion of their needs as early as the project planning stage
Close and supportive collaboration in an interdisciplinary project team with PV Bau, PV BSA, PV Umwelt, BHU and the client
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