Preliminary investigation, renovation project and renovation of 25m, 50m and 300m bullet traps
The project
Location: Opfikon (ZH)
Client: City of Opfikon
Phases: Project planning, submission, remediation of contaminated sites (SIA 31-53)
Duration: 2016-2021
The Rohr shooting range in Opfikon comprises a 300 m, a 50 m and a 25 m bullet trap with a total of 46 targets. The results of the preliminary investigation of contaminated sites showed that, due to the small distance between the targets, all of the bullet traps require remediation to protect the groundwater. As a result, a remediation project was drawn up on behalf of the city for the three bullet traps. In 2019, the construction and clearing permit was issued and the tender for the renovation was put out to public tender. The renovation was then carried out in the fall/winter of 2020 within around 2 months. The final greening work and the planting of cleared areas were carried out in spring/summer 2021.
Carrying out historical research and technical investigations to assess the protected groundwater and surface waters
Planning and implementation of a detailed investigation of contaminated sites with detailed mapping of soil contamination at all three bullet traps
Development of a development and construction site installation concept, taking into account various environmental regulations (soil protection, forest, water protection, etc.)
Development of a remediation project for the remediation of contaminated sites incl. recultivation concept
Preparation of a dossier with building and clearing application, planning and preparation of conditions and measures from the permits
Preparation of tender documents and public invitation to tender for the remediation of all three bullet traps, award of contract and preparation of contract for work and services
Construction and specialist construction management during the execution of the remediation, recultivation and repair work, including management of conditions and subsequent application for cost allocation
Challenges
Due to direct drainage into the Glatt and a short distance from the site, the protected resources of surface waters and groundwater had to be examined and assessed
The temporary clearing of a small wooded area was necessary for the remediation of the contaminated site, and there were also requirements in connection with the location in an archaeological zone
The facility is located directly next to a waste collection point and a waste disposal center, where there is a lot of activity/traffic.
Our solutions
Careful preliminary clarifications, planning and preparations as well as good coordination with the responsible municipal and cantonal specialist departments and authorities
Early involvement of all affected land and forest owners, users and maintenance; ongoing and transparent information and active involvement for the details in the submission (development, special requirements) and final design (recultivation, greening and afforestation)
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