For the new extension the excavator is to be brought onto the site. In the folder there is an older service plan on which little is drawn in the planned area. Before that becomes an assumption for the work, you must have clarified which installations were actually queried, which area the document refers to and who will take the information into the execution.
An enquiry has a defined operator scope
Wiener Netze describe their service as a point of contact before planning and excavation work. The public FAQ explicitly lists the networks they provide information on, including electricity, gas, telecommunications as well as district heating and district cooling of Wiener Netze; in part installations of Wien Energie are also taken into account. This does not amount to a universal enquiry covering all private or third‑party installations in the ground. [WN]
The FAQ also explains different representations in PDF and DWG as well as the significance of the requested area. A background map for orientation is not equivalent to a complete inventory of all conceivable services. The information must be professionally matched to the actual place of work. [WN]
The enquiry must belong to the project
Our recommendation: determine the required area with the responsible parties on the basis of the planned works. Not only the new building can be relevant, but also other intended earthworks or necessary working areas. Have the scope and spatial allocation of the enquiry confirmed, rather than merely passing on an address.
Clarify who uses the service and who obtains other required information. The public description mentions registration, activation and a chargeable service. For your timetable therefore “we’ll quickly download it tomorrow” is not a reliable assumption as long as access is still unclear. No account is opened here nor is a chargeable enquiry ordered. [WN]
From the plan to responsible execution
Pass on complete documents including conditions to the contracted specialist companies. Have it confirmed that the work area and the current planning correspond. Which protection, coordination or further investigation is necessary is part of the professional preparation; this article does not contain an excavation manual or self‑defined safety distances.
Wiener Netze explicitly refer in their FAQ to their conditions for work near installations. Keep this separate task visible in the process. The mere existence of a plan file is not the completion of all required preparation. [WN]
An older plan with a new working area
In the fictitious example the available information originates from the original house access. The new extension and its earthworks are located laterally outside the original enquiry area. The client has the scope newly agreed and clarifies further operators or private inventory information with the companies. The old plan remains as a historical document but is not designated as a current overall release.
Your result is an organised information package with operator, area, date and responsible takeover. If the scope of work changes or the start is delayed, its usability must be clarified again. The service information described here refers to Wiener Netze; other operators and regions may have different procedures and conditions.