Project pathway
The quickest route to the right decision.
Explosive ordnance assessment in Konstanz for paths and small foundations
Project owners, design offices and site managers need a defined investigation task for path works and individual structural elements in Konstanz. The path centre, verges, drainage and new foundations may affect different volumes of ground. FONTANA-EOD supports review of existing findings and the agreed investigation. Send the ground disturbance plan with depths and working space, earlier reports and applicable access and use rules. These establish which results apply and which specialist tasks remain outstanding.
Distinguish use from construction works.
Include verges and structural elements.
Plan access and investigation together.
Assess the construction project
What needs assessment for paths and small foundations in Konstanz?
The commission must cover the groundworks actually planned, including edge areas and individual foundation points. Existing access or use rules are considered. For each ground disturbance, the investigation status available is checked; a described future measure counts as addressed only when its actual result is available.
Project site
Identify Konstanz and the specific local task
Limit the Bettenberg reference to the status described
The Konstanz document of 26 January 2026 addresses prerequisites for the visitor management concept at Bettenberg. It identifies paths, verges and areas for information boards that require renewed investigation. For a project's own works, check accordingly which measures have actually been completed and documented. The geoportal may help spatial orientation; the necessary reports are additionally consulted.
Konstanz is a major district town in the Konstanz district and the Freiburg administrative district in Baden-Württemberg, Germany. State the specific project address and municipality. A limited reference concerning a former military training area is not applied to the rest of the town. For projects outside the town boundary, local responsibility depends on the actual location. Maps and municipal overviews help identify the spatial reference, while specialist reports describe the investigation carried out.
Local context
Coordinate access and investigation status for groundworks
Interpret the planned measures at Bettenberg correctly
In the assessment of consultation responses for the Hafner Nordwest development plan, dated 26 January 2026, Konstanz addresses visitor management on the former Bettenberg military training area. The report records conditions agreed with the BImA. These include renewed surveying and, where necessary, clearance of proposed paths and verges, and areas for information boards and experience stations. The planning document records these requirements, not their completed execution.
Provide complete information for small ground disturbance
This illustrates an important distinction for a commission: a path may be intended for a particular use without every new ground disturbance having been assessed. For works on paths or open areas, therefore also describe activities alongside the actual traffic surface. Foundations, drainage and changed path edges may occupy different ground from the previous use.
The Freiburg regional authority describes the Bettenberg-Giratsmoos nature reserve as a former military training area whose landscape remains shaped by military use and where explosive ordnance is present. This specific local context is distinguished from the question on other plots. Existing access and use rules must still be observed. For a specialist commission, necessary access and actual groundworks are clarified with those responsible.
Requirements
Clarify technical requirements and responsibilities within the project
Relate requirements to the specialist task
For commissioned activities in Germany, the relevant technical requirements and questions of permits, competence and responsibility are clarified. The scope of services actually intended is decisive. Permits, competence and responsibility are assigned appropriately to the planned activities, specific tasks and coordination between them.
Link occupational safety to the construction sequence
Risk assessment, work areas and communication must suit the proposed activities. Ordnance specialist works are coordinated with the other construction activities. Operational organisation, traffic safety and other specialist technical inspections retain their own responsible parties. Joint coordination brings the information together without equating the different tasks.
Use technical findings correctly
A measurement anomaly first requires specialist assessment; its appearance alone does not identify it as explosive ordnance. If an object is genuinely suspected to be ordnance, the prescribed reporting procedures and the measures set by the responsible authorities apply. Investigation reports specify the work completed and its limitations, so that results are not extended to unexamined areas or later design changes.
Local procedure: Konstanz: Hafner Nordwest, assessment of consultation responses of 26 January 2026 · City of Konstanz: geoportal and planning information · City of Konstanz: report a bomb find or other explosive ordnance.
Planning and documentation: BFR KMR: principles of clearance planning · BFR KMR: geophysics · BFR KMR: documentation · DGUV: explosive ordnance clearance FAQ · Stuttgart Regional Council: explosive ordnance disposal in Baden-Württemberg
The BFR KMR are used as technical guidance; locally applicable requirements and responsibilities must be clarified separately.
Permits, competence and responsibility for the specific activity are considered under the Explosives Act and the First Ordinance to the Explosives Act. The risk assessment under Section 5 of the Occupational Safety and Health Act relates to the planned activities. The DGUV Information 201-027 covers preventive investigation and clearance of conventional explosive ordnance and defines its scope. Its references to DGUV Rule 113-003 concern particular activities involving explosives; they are not applied indiscriminately to every construction-site investigation.
Working together
Distinguish the tasks of client, designers and specialist contractor
Client and operator
The project owner describes the proposed work and provides the available project documents. The operator adds requirements for use, access and timing. A coordinating contact makes cooperation easier but does not automatically take on every other party's duties. Before commissioning, record clearly which information is missing, who will obtain it and which decision the result is intended to support.
Planning and construction management
The specialist designers describe areas, depths, construction methods and changes. Site management coordinates the planned sequence with the construction contractors and agreed specialist works. Results are assigned to the respective intervention. A technical plan change is communicated early enough for its effect on the survey task to be assessed before construction. Organisational construction stage boundaries remain distinguishable from technical survey boundaries.
Specialist company and competent bodies
The private explosive ordnance specialist carries out the agreed assessment, investigation and documentation scope within the required permit and competence framework. The report identifies the volumes actually addressed and its limitations. The competent public authorities make official decisions. In Baden-Württemberg, the KMBD is based at Stuttgart Regional Council. Report a possible find to the competent local police authority or nearest police station; they notify the KMBD. Under its conduct rules, identification and further handling of the find remain reserved for KMBD specialists. Necessary public safety measures are clarified with the competent authorities.
Investigation task
Which specialist task comes next?
Define the specific investigation question
Historical use, existing findings and planned groundworks together provide the basis. The specialist planner derives the scope needed and a suitable approach. Access, installed structures and assessability must be considered. A particular path surface or small foundation cross-section does not already determine the appropriate investigation method.
Choose suitable specialist services for the specific groundworksMark outstanding edge areas spatially
The result must identify the area actually investigated. If an edge strip or foundation point could not be adequately addressed, this remains documented. Further steps are agreed by specialists and included in the construction sequence. A result within a path is not applied without review to all works alongside it.
Compare investigation methodsProject types
Plan land use and specific ground disturbance together
Assess previous use and existing results
Send known details of previous land use with the existing reports. Precise spatial identification is as important as the stage of progress. The specialist planner checks which conclusions are already available and which question remains open for the planned works. A general reference to use does not replace evidence of investigation.
Check whether a report covers the actual proposed path section with its adjoining space or only a neighbouring area. Enclose the associated location appendices and later additions. A stated intention to survey is recorded as planning. For completed work, compare its documented scope with the new ground disturbance. Missing appendices or uncertain references are identified as outstanding questions.
Arrange specialist assessment of historical evidence
Show narrow and individual ground disturbance as well
Mark path works, verges and foundations individually on the plan. Add proposed depths and working space required. Small structural elements may need their own groundworks. Their investigation needs are therefore determined from the specific ground disturbance and existing knowledge, rather than only the size of the later visible structure.
These may also include edging, anchors and working space outside the completed element. A plan with reference elevations shows where these works extend beyond the existing path structure. If a point moves, clearly identify the change. Everyone affected receives the same revision. The investigation scope is related to these actual spaces so that execution can be prepared with the results needed.
Compare specialist services
Distinguish planned measures from completed ones
A plan describes what is still intended; a results report documents the work actually carried out and the limits of its conclusions. Keep both stages separately traceable. Before the next ground disturbance, check whether the necessary results are available. A proposed survey does not become completed evidence merely because it is mentioned in a document.
Keep the drawing revision and construction section actually addressed with each piece of evidence. Identify recipients and the coordinating contact. Unaddressed adjoining spaces remain outstanding even when another section is already complete. After a change, compare the new spaces with existing reports. Additional results receive their own area reference and remain traceably available with earlier documents.
Document findings and their limitationsPreparation
Prepare the scope and commission together
Establish what needs to be known before commissioning the work
The quotation identifies the groundworks actually proposed. Alongside the path, verges, drainage trenches or individual foundation locations may be affected. Existing reports are checked for spatial coverage and the conclusion required. Specialist services and results documents needed are agreed. Permission to use the path remains available as a separate prerequisite; it is considered separately from the knowledge available for new groundworks.
Define the specialist taskCoordinate preparatory work with the investigation
Access and preparation are agreed with owners and those responsible. For the investigation, record the areas that may actually be accessed and the restrictions applicable. Necessary investigations and protective measures are clarified before preparatory ground disturbance. This may also concern new access or working space beside the path. An accessible section is not assumed without review to provide suitable prerequisites for all adjoining works.
Clarify preparatory work in the programmeAgree a clear scope and schedule
Execution is prepared in sections using available results. A report for a path section can concern foundations planned alongside it or deeper drainage only within its actual scope. Site management receives the necessary plans and outstanding tasks together. If a location moves, compare the new volume of ground before ground disturbance. Applicable earlier results remain available for further planning within their documented limits.
Discuss the scope and scheduleTasks at the site
Describe the construction task on the site precisely
01
Mark ground disturbance beside the path
As well as the path line, mark the adjoining areas actually to be addressed. Drainage or new edging may extend beyond existing paving. Add planned depths. This allows assessment of whether existing results suffice or areas not previously investigated are being added.
02
Include small foundations in investigation planning
An information board or other site feature may require only a few foundation points. These points still belong in the groundworks plan. Their small size does not answer the explosive ordnance question. If the location later changes, the new point must also be compared with existing knowledge.
For several site features, an unambiguous point list linked to the site plan is useful. Assign each location its proposed depth and working space required. Alternative locations still outstanding are marked as options; the final arrangement is agreed with the specialist planner before the affected groundworks.
03
Agree access and preparation beforehand
Clarify with owners and responsible authorities how specialists may reach the areas needed. Existing access restrictions must still be observed. Preparing an investigation may itself involve ground disturbance, for example when creating an access route. Such works must not be silently treated as already clarified prerequisites.
Communicate known requirements for land use and neighbouring facilities. The area accessible for an investigation may differ from the entire later construction task. A section initially excluded remains identified accordingly in the progress record. Prerequisites for later access are agreed separately. Necessary investigations and protective measures must be clarified before the preparatory ground disturbance they affect.
04
Connect maps with specialist documents
The Konstanz geoportal provides access to orthophotos, the property cadastre and land-use planning, among other information. These help show a project spatially. They do not replace an explosive ordnance report. Send a current plan with the associated specialist documents so that the plot, path section and planned structural elements match unambiguously.
Project documents
Documents that establish the next step
Clarify access and working space early
An accessible path does not automatically provide all prerequisites for works beside its surface. Agree the working area needed and applicable use rules with those responsible. Investigation and execution must account for these conditions. Missing access or unresolved edge areas remain identified as specific preparation tasks.
Compare moved locations again
If a foundation or information board moves on the plan, the proposed ground disturbance changes. Mark the new location and pass on the revised drawing. The specialist planner compares it with the previous investigation scope. A result for the former location does not automatically cover a spatial change.
Where clearance work is carried out, the associated clearance record is kept in the project file with the areas addressed.
Construction sequence
Coordinate investigation and construction sections
Send the complete path design before investigation
Show the route, width, edge areas and individual foundations. Enclose existing reports and relevant access and use requirements. The investigation can then be matched to the actual scope of work. Prerequisites for the work and documents still missing are clarified before the proposed date.
Check the scope of results before execution
Compare the current construction drawing with the investigation areas actually documented. Moved points, changed depths and additional edge works are considered separately. Site management receives the applicable reports and appendices. For later maintenance, these documents remain available with their specific spatial reference.
Method selection
Select methods according to the task and survey conditions
Historical records and aerial photographs
Historical records and aerial photograph assessments are considered for the specific investigation area. Former military use may make further information on use areas and previous work relevant. Existing knowledge is checked with its sources and spatial limits. Where questions remain open, any necessary additional research or aerial photograph assessment is actually carried out. The results support planning for the proposed path and foundation spaces. A Bettenberg finding is not applied to other Konstanz plots.
Understand aerial photograph assessmentMagnetometric survey
Geomagnetic surveying passively measures the magnetic field. An object's magnetic effect determines detectability; electrical conductivity alone is insufficient. Along paths, utilities, edging and other metal structures may affect measurements. The specialist planner checks appropriate use for the path section and adjoining areas. Anomalies and interference are assessed in the investigation context. The result shows which spaces were addressed under actual conditions and where a limitation remains.
Understand the scope of magnetometryElectromagnetic methods
Transient electromagnetic methods, or TDEM, assess the time-dependent electromagnetic response of conductive objects. Their suitability depends on the investigation objective and actual measurement conditions. Known metal structures and utilities are considered. For a new information board foundation or trench, the volume of ground required is defined separately. Data and assessment receive their spatial reference. A conclusion for an investigated strip is not extended to adjoining or deeper works merely because the path is continuous.
Understand electromagnetic surveyingGround-penetrating radar
Under suitable conditions, ground-penetrating radar may provide information on structures and anomalies in the ground. Ground structure, moisture, installed structures and the investigation objective affect technically appropriate use. The question to be answered is linked to the actual location and depth of the planned work. Detected structures require specialist interpretation. A measurement image alone does not identify explosive ordnance. The report clearly records the conclusion reached and its limits for the area addressed.
GPR and limitationsDeep-ground and downhole surveys
For deep foundations, utility connections or other deeper ground disturbance, establish the conclusion needed at the proposed depth. A necessary deep-ground or borehole survey is agreed with points, depths and reference elevations. Access rules and known installed structures remain considered. Clearance for a borehole, or the technical evidence, applies to the space actually investigated. If an obstacle requires a point to move, compare the new location with the existing result before work begins.
Prepare deep interventionsSurvey during construction
If a necessary preliminary investigation cannot be completed in full, further specialist work is planned for the affected space. Explosive ordnance investigation during construction may combine investigation, necessary excavation in layers, specialist exposure and additional surveys. Access, working space and the proposed groundworks are coordinated. Merely watching the works is insufficient as detection. Path sections and individual foundation spaces addressed remain documented with their results and limitations; further tasks needed are specifically identified.
Agree the approach during constructionTechnical assessment
What needs clarification before groundworks
Assess existing findings specifically
The Historical aerial photograph analysis and other existing findings provide foundations for specialist assessment. Former military use may make further information relevant. Investigation needs must be assessed for the specific area and task. A statement about Bettenberg does not support a general conclusion about contamination on other Konstanz plots.
Agree an appropriate measurement task
Before Surveying begins, the investigation objective and local conditions must be clarified. Utilities, metal structures or the nature of access may affect execution. If a subarea cannot be assessed, include this in the result. A continuous line on a construction drawing must not conceal such gaps.
For several separate points, identify which point was actually investigated. An inaccessible foundation location receives its own outstanding status. The specialist planner determines the information or additional work still needed there. A common site plan connects results without extending their scope. Site management receives this status before the respective affected groundworks.
Plan the sequence where measurement is limited
A Clearance plan may define the measures needed for the planned groundworks. Access and preparatory ground disturbance must also be considered. Merely watching excavation does not replace a proper specialist investigation. Whether explosive ordnance clearance during construction is suitable depends on the specific task and local prerequisites.
Any required area clearance is prepared for the agreed ground volume. Findings and possible recovery requirements are coordinated with the responsible parties. The work actually carried out and scope addressed remain traceable for the results handover.
Next steps
From path design to documented investigation
Record use rules and the specialist commission separately
A rule on access or visitor management serves a different purpose from an investigation commission for ground disturbance. Provide both to specialist planners where they concern the area. Access conditions remain identifiable while investigation scope is defined from the proposed works. Initial contact identifies the project location and conclusion needed. Existing plans, statements and reports are checked for currency, spatial relevance, completeness and gaps.
Address outstanding historical questions
Where historical questions remain, the research and aerial photograph assessments required are carried out within the agreed specialist commission. The KMBD's existing preliminary investigation is considered in relation to the project for which it was requested. Additional findings are assigned to today's ground disturbance area and used in investigation planning.
Communicate design changes before ground disturbance
If a foundation moves or drainage follows a different route, the specialist planner should know the new location. Existing results may still apply, but this must be checked before the changed area is opened. A replacement location chosen spontaneously on site is not automatically covered by the original commission. The suitable method is selected using the investigation objective, ground disturbance depth, ground structure, installed structures and actual measurement conditions. Access and necessary prerequisites are clarified with those responsible.
Perform the agreed investigation
The agreed survey or appropriate investigation during construction is carried out on the defined areas and points. Measurement data and observations receive clear position and elevation references. Uninvestigated areas, restricted access and relevant interference are recorded.
Assess and document findings
The collected data and findings are assessed against the investigation objective and actual measurement conditions. The assessment takes account of interference and limitations. The report and plan appendices document the technical assessment, areas addressed and their position, elevation and depth references. Required further tasks follow from this.
Document investigation areas clearly
The results report must identify the path sections, adjoining areas and individual points it covers. Depths investigated and remaining limitations are equally important. Pass these details with the plans to site management. A general note about the entire open area may make the actual scope appear too broad.
Consider later maintenance as well
For later repairs, retaining the documents for the completed element is useful. A new drainage trench or deeper foundation may extend beyond the earlier investigation scope. Before such works, compare existing results with the ground disturbance again. A single investigation is not unlimited evidence for every later use.
Documentation
Contacts for preparation in Konstanz
Findings and their scope
The explosive ordnance disposal service at the Stuttgart regional authority is responsible throughout Baden-Württemberg. Landowners must arrange searches and recovery. Within its capacity, the service provides these services against reimbursement of costs; otherwise, private specialist contractors must be involved. Render-safe operations and other sovereign duties remain with the responsible service.
Project responsibilities
FONTANA-EOD agrees the commissioned specialist services for the planned project with you. Access restrictions and requirements of responsible authorities must be considered. Outside their federal scope, the BFR KMR guidelines provide technical guidance; the decision for an individual project must be made separately.
Working approach
How FONTANA-EOD works
Document the agreed specialist service clearly
FONTANA-EOD addresses the agreed specialist commission for the planned groundworks. The investigation and its result are documented by path section, adjoining area or individual point. Existing access rules remain a separate prerequisite. Site management receives the actual stage of progress and outstanding tasks for the next work. A result for one section remains available within its original scope; additional spaces are agreed separately.
Discuss the investigation taskThe task before the equipment
A small site feature may need its own foundation and working space not previously considered. The specialist commission describes this task with location, depth and conclusion required. The specialist planner compares it with existing knowledge and measurement conditions. The appropriate approach follows from this comparison. A small visible element alone determines neither investigation scope nor suitability of a particular method.
Keep limitations visible
Edge strips and individual points that could not be adequately investigated remain identifiable by location. The report states the stage actually reached and the technical limitation. Further needs are agreed before the respective groundworks. A continuously drawn path is therefore not equated with a continuously completed investigation. Subsequent participants can distinguish usable results from spaces still outstanding.
Clarify changes before intervening in the ground
If an information board moves, a path route changes or drainage is deepened, the current design is passed on before ground disturbance. FONTANA-EOD compares the new task with the agreed scope and work already addressed. Additional specialist work is agreed for the affected spaces. Earlier results retain their location and depth references. The new drawing revision and additional findings remain available together for the next construction phase.
Hand over the report and plan together
For later maintenance, the results report and location appendices are retained with their reference to the completed path or element. Identify recipients in design and site management. A repair may occupy a different depth or additional adjoining space. Before the affected groundworks, compare the new ground disturbance with the documented status. If contractors change, complete documents and outstanding tasks for the next steps are passed on.
Understand the results
Use technical statements for the next decision
Distinguish use rules from investigation results
A visitor management rule describes where and how use is intended. An investigation report describes a specialist service carried out. Both may be relevant to project preparation but address different matters. Planned groundworks are coordinated using the documents required and applicable requirements.
Understand investigation reports and their limitationsConsider maintenance and later additions
New foundations or path changes may be proposed even after initial construction. Earlier results are then compared with the new ground disturbance. Keep site plans and reports together for this reason. An earlier investigation retains its described scope and is not spatially enlarged by later use.
Understand the service scopeDesign and findings
Documents for the next construction decision
Historical evidence and the current design
Aerial photograph interpretation is related to the actual groundworks. Its purpose and geographical scope remain distinct from a technical investigation of the ground as it is today.
Understand aerial photograph assessmentSpecialist reports for site management
The findings, their locations and limitations are handed over together. This makes clear to those carrying out the work which area has been investigated and which task remains outstanding.
Assess investigation reports
Further technical topics
Further technical information for your project
Determine the specialist service from the planned groundworks
Historical assessment, technical investigation and further work answer different questions. The service overview helps distinguish these tasks in an enquiry.
Compare servicesCoordinate the project sequence with everyone involved
Preparation connects the commission, site work and handover of findings. Changes to the project can then be incorporated into technical coordination in good time.
Process and documentationQuestions from planning
Questions about paths and open areas in Konstanz
May an accessible path be excavated without further clarification?
Accessibility alone does not answer this. Check whether existing explosive ordnance documents cover the specific proposed ground disturbance with its location and depth. Use rules and investigation scope are different questions.
Does the Hafner Nordwest report establish completed clearance at Bettenberg?
No. The passage cited here describes conditions for implementing the visitor management concept. It is not a completion report for surveys or clearance works carried out.
Do verges and new information board foundations belong in the enquiry?
Yes, where groundworks are proposed there. Show the affected areas and individual points on the plan and add planned depths. A report covering only the path centre does not automatically include them.
Can a statement about Bettenberg be applied to other Konstanz areas?
No. Another plot's own history of use, available documents and planned works are decisive. A spatially limited reference does not replace specialist assessment there.
How should I report a suspicious find in Konstanz?
Stop the affected work. Do not touch, move or relocate the suspicious object, and do not uncover it further. Leave the danger area, keep others away and call the police on 110 from a safe distance. Do not take the object to a police station. Follow the competent authorities' instructions.
How is an inadequately investigated edge area documented?
Mark its location and the stage of work actually reached. The outstanding task remains distinguishable from the result for neighbouring areas. Necessary further steps are agreed by specialists and considered in planning the next groundworks.
Must a later relocation be communicated?
Yes. The new location must be compared with the actual investigation scope before ground disturbance.
Which cost factors matter for paths and individual foundations?
Relevant factors are existing historical assessments and reports, length and width of affected routes, adjoining spaces and individual points, ground disturbance depths, access and preparatory works, suitable methods and interference, and analysis and documentation. Initially inaccessible areas and additional investigations are considered with their scope. A changed point location or drainage arrangement is agreed before the affected ground disturbance. Specialist services remain distinguishable from construction preparatory works.
Project enquiry
Prepare the first technical discussion
Show all working areas
Show paths, verges, foundation points and working space on the site plan.
Add proposed depths, reference elevations and the sections needed first. Identify known utilities, installed structures and further access restrictions. Enclose complete earlier reports with their location appendices and sources. Leave unresolved edge areas identifiable in the enquiry. Name the project owner, specialist planner, site management and the contact who coordinates shared prerequisites and design changes for further discussion.
Include the current status
Clearly distinguish existing reports from measures still planned.
For completed works, enclose the conclusion actually achieved. For future measures, identify the task, area and required date as the planning status. Changed point locations, additional drainage or further working space are communicated with the same drawing revision. Also state applicable use and access requirements. The next construction phase receives complete results and tasks still to be clarified for its groundworks. Identify the project location in Baden-Württemberg or the other federal state.
Project process and documents
Project process and documentsMethods and technology
Methods and technologyIdentify the project location and region
Select a regionAssess the use and construction task
Describe the project settingAgree further specialist services
Clarify the recovery task
Have your project assessed
Whether historical aerial photograph analysis, explosive ordnance surveying, surface surveying using GPR, magnetometry or TDEM, deep-ground surveys, downhole surveys, excavation supervision, area clearance or ordnance recovery is needed depends on the location, ground disturbance, depth, ground and existing documents. An early ordnance assessment provides clarity for tendering, programming, occupational safety and construction.
FONTANA-EOD combines its Section 7 SprengG licence, specialists holding Section 20 SprengG certificates of competence, suitable survey and clearance methods, and traceable documentation. Send the site plan, depth of ground disturbance, construction phase and existing documents for an initial technical assessment.
