Project pathway
The quickest route to the right decision.

A woodland construction area may be clearly defined on a plan but still need suitable access on site. Project owners, forestry planners and site managers must also coordinate the ground disturbance proposed for this. FONTANA-EOD clarifies the explosive ordnance task for each work stage with you; send the site plan, proposed depths of ground disturbance and existing specialist documents.
Distinguish existing tracks from working areas needed.
Include ground disturbance before the main construction.
Treat forestry requirements and explosive ordnance investigation separately.
An explosive ordnance investigation before construction in the Freiburg administrative district also includes access roads and preparatory groundworks. Available explosive ordnance documents, former uses and specific ground disturbance determine further investigation needs. A method's suitability follows the objective, depth and measurement conditions. Forestry prerequisites and explosive ordnance specialist work are coordinated with those responsible before the respective activities affected.
Documented location references
Select a project location on the map or in the location list. The associated entries lead to the protected reference overview.
The markers identify locations associated with documented references, not precise find or construction-site coordinates. Several entries may belong to one project. References without a reliable location assignment are available in the complete reference overview.
Map data: © BKG (2026), VG250 / GN250, Data licence Germany – attribution 2.0. Area outline projected for display. Selection and project assignment: FONTANA-EOD.
Explosive ordnance surveying – Biberach – EÜ Brucher Straße, line 4250 km 17.177 – Bahnbaugruppe Biberach
Service period: 2026-07
Service areas:Downhole magnetometry / deep-ground survey

The Freiburg administrative district lies in Baden-Württemberg and comprises nine rural districts and the Freiburg urban district. The regional authority's description of the area names France as its western and Switzerland as its southern neighbour; within Baden-Württemberg, the Karlsruhe and Tübingen administrative districts adjoin it. A project identifies the municipality, district and specific areas of ground disturbance. A longer route may involve several local contacts. Unit 83 at the Freiburg regional authority addresses statewide forestry tasks. The Baden-Württemberg KMBD is based at the Stuttgart regional authority. Existing requirements for access and land use are agreed with the respective responsible body. The local explosive ordnance question is addressed using the project documents. For other project locations, the regional overview provides the appropriate classification.
Information on explosive ordnance surveying in Villingen-Schwenningen, Konstanz, Offenburg and Lörrach supports preparation of your project enquiry. Documents and planned ground disturbance on the respective property are decisive.
Within the administrative district, former uses and wartime events must be researched for the specific project location. The Freiburg official bulletin of 27 November 2004 documents the air raid on the town of 27 November 1944. It describes damage in the Mooswaldsiedlung, around railway facilities and in the old town. For present-day ground disturbance, available aerial photographs and records are assessed spatially and compared with later changes. For woodland outside these evidenced locations, its own former uses and available historical documents are decisive. Belonging to the same administrative district describes today's administrative area; grounds for suspicion follow the findings for the respective area.
Unit 83 at the Freiburg regional authority performs statewide forestry duties. These include approvals for forest conversion and involvement in spatial planning. Its responsibility is therefore not limited to the Freiburg administrative district.
A forestry-law decision and an explosive ordnance investigation answer different questions. The Stuttgart regional authority is responsible for the statewide explosive ordnance disposal service. The forestry prerequisites a particular project must meet are clarified with the bodies responsible for them; this does not automatically provide a conclusion about the ground investigated.
For technical preparation, we need a description of the works actually planned. Will an existing track remain unchanged or be widened? Is work only above ground proposed, or will tree stumps, terrain and ditches be disturbed? These differences help specialists review investigation needs for the individual steps.
The site plan defines the main construction area and preparatory working areas separately. These include, for example, access roads, crane standing areas, utility trenches or drainage works where actually proposed. For an existing track, continued use is distinguished from upgrading. The description identifies the width, location and maximum depth of changes. If these details remain undecided, the options remain identifiable as such. A reliable task description helps clarify investigations required and their execution prerequisites before the respective ground disturbance.
For the commissioned work, the applicable technical requirements, permits, competence and responsibilities are clarified. The actual scope of work is what matters. Tasks and interfaces are described for the project and checked against the required authorisations.
The risk assessment, work areas and communication arrangements must suit the planned activities. Specialist explosive ordnance work is coordinated with the other construction activities. Site organisation, traffic safety and other technical assessments retain their own responsible parties. Joint coordination assigns the relevant specialist work and responsibilities to the affected construction sections.
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.
If possible explosive ordnance is found, stop the affected works immediately. Leave the object untouched, keep your distance and warn others without putting yourself at risk. Notify the police immediately on 110 and follow their instructions. Do not attempt your own investigation or recovery.
The Forest Policy and Forestry Directorate for Public Bodies unit explains statewide forestry duties. For individual ground disturbance, the relevant requirements are agreed with the responsible body.
The BFR KMR guidelines on clearance planning describe preparation of the clearance task. The sections on geophysics support method selection, while those on Documentation support handover of results. The state information on explosive ordnance disposal explains the duties of the state service. The DGUV FAQs on explosive ordnance clearance address technical questions about execution.
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.
The client describes the project and provides the available project records. The operator adds requirements for use, access and timing. A coordinating contact brings the parties together; individual tasks remain assigned to the named parties. Before commissioning, it is clearly recorded what information is missing, who will obtain it and what decision the result is intended to prepare.
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.
The private explosive ordnance specialist carries out the agreed investigation and documentation work. Requirements and decisions of public authorities are addressed with the responsible bodies. The documents needed for a particular procedure depend on the location and project. The technical report describes the work carried out, including its documented area, depth and scope. Decisions reserved for public authorities are made by those authorities.
The statewide explosive ordnance disposal service at the Stuttgart regional authority is the state's specialist body for Baden-Württemberg. Preliminary investigation requires an application with a clearly defined site plan. The private specialist contractor undertakes the commissioned investigation and documentation scope. Forestry approvals and any forestry or nature-conservation assessments needed are addressed with the respective responsible or appointed bodies. Project owners, designers and site managers identify their contacts. The agreed construction sequence records which technical prerequisites must be met before the ground disturbance concerned.
The investigation objective, depth of ground disturbance and local conditions determine specialist selection. Vegetation alone does not define a method. Nor does a preferred construction date replace checking suitability. Planning describes the conclusion needed and the prerequisites under which it can be achieved in the proposed area.
Select suitable methods according to the task and local conditionsIf an area cannot initially be investigated sufficiently, this limitation is recorded. The works planned there later are described separately. This determines further specialist coordination. A blanket approach during construction is not assumed merely because preliminary investigation is difficult.
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Hand over earlier assessments and investigation reports with their associated maps. Today's vegetation does not fully explain former use. The area actually documented matters for the planned task. Conclusions about a track or neighbouring area are therefore compared with the proposed ground disturbance and the report's limits.
Earlier documents include available site plans, historical aerial photograph assessments and reports of previous specialist works. Their scope is compared with today's plan. Where a track, ground elevation or property boundary has changed meanwhile, trace what the older conclusion referred to. An old report may help with part of the access road while documents are still missing for the construction area beyond it. These differences are recorded with their locations and the conclusions needed. If reliable historical information is missing, appropriate research or aerial photograph analysis is prepared as a separate specialist task.
Assign earlier assessments and investigation results
Distinguish a track to be used unchanged from an access road to be widened or drained. Identify other works that disturb the ground. Preparatory areas also receive an identifiable scope. The specialist planner can then check prerequisites before these steps and coordinate the sequence.
Access planning also considers the requirements of the selected investigation. An instrument may need different movement space from a team working on foot. Existing utilities, installed structures, slopes and interfering objects are marked on the plan where known. Specialists agree which area must actually be accessible for investigation. Groundworks for preparation also receive a defined task. Site management can then decide which prerequisites for the next section are available and which works first need clarification with the specialist planner.
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The results documents show which areas could actually be covered. Inaccessible areas or those that cannot be sufficiently assessed remain visible. For the next works, the documented scope is compared with the current plan. An investigation along an access road is not transferred wholesale to the entire woodland area.
Phased work requires clear handovers. The specialist contractor documents which areas were investigated, to what depths, what findings are available and where interpretation was restricted. Site management compares this information with the next work stage. If the location or depth of a proposed access road changes, communicate the change before constructing it. Moving from a narrow working corridor to a larger construction area also changes the volume of ground needed. Existing results are checked against this scope and supplemented with further specialist work where required.
Document findings and their limitationsFirst establish which decision the commission needs to support. Is the task an initial assessment of existing documents, an investigation of a specific area or examination of an anomaly that has already been assessed? These tasks require different evidence. A general wish for safety does not define an investigation that can be carried out. The enquiry therefore specifies the groundworks, location, depth and available findings. Suitable specialist work and the required reporting are then agreed on that basis.
Define the specialist taskRequired access and survey conditions are clarified before the site visit. This may include keeping areas clear, obtaining service information and coordinating with other trades. The method and site determine which preparations are actually needed. Changes to the surface or additional groundworks are not undertaken unilaterally simply to prepare for a survey. Their sequence is agreed with the specialist designers and responsible parties.
For tendering, describe the scope so that quotations cover the same investigation task. Besides the area, include depths of ground disturbance, available documents, known interference and necessary access. Communicate time windows and other specialist requirements. Identify preparatory work still outstanding with the person responsible. Analysis, communication of findings and results documents also matter when assessing quotations. Any required clearance plan describes the findings, tasks, methods and agreed construction sequence. If area clearance or investigation of a finding becomes necessary, that service receives its own defined scope. Coordination connects the specialist task with the actual construction sequence. Any necessary Ordnance recovery is coordinated with the specialist task and responsible bodies.
Clarify preparatory work in the programmeA realistic programme distinguishes technically resolved work from prerequisites that are still outstanding. If only part of a site will be accessible, the commission must take this into account. Handover and assessment of the results also need time in the construction programme. The schedule and effort are agreed once the scope, access and prerequisites are clear. This coordination brings together the specified scope, access, documents, site conditions and the date by which a decision is needed.
Discuss the scope and scheduleDraw the proposed access roads and explain whether earthworks are planned there. A track name alone says nothing about soil replacement, widening or drainage works. A temporary access road is also assessed according to the ground disturbance actually involved.
State which steps are proposed before the main construction works. These may include, for example, woodland clearance involving ground disturbance or creating a working area. Specialists clarify the investigation needs for these preparatory works before they begin.
Include existing plans and relevant conditions for use of the area. Time or space restrictions may matter during preparation. The explosive ordnance specialist contractor replaces neither the forestry authority nor any forestry or nature-conservation planning required.
Describe vegetation, terrain, existing installations and accessible working areas where known. Specialists must check whether proposed surveying is suitable under these conditions. Access on foot alone does not demonstrate that the area can be measured completely.
An area reachable on foot may still offer only restricted use for the proposed investigation method. Describe the terrain, vegetation and known installations as specifically as possible. The specialist planner assesses the actual conditions. Required preparatory works are coordinated with their own ground disturbance and relevant requirements. Initial data, the site plan with cadastral plots, the construction area or route, and historical documents are connected to measurement data. Survey results and assessment of findings document the investigation status reached. Where clearance work has actually been carried out, the clearance record is included. The conclusion identifies further steps for outstanding areas.
Method selection checks which target objects are to be detected and what conclusions are required. The soil profile and moisture may affect interpretation; metal utilities, fences or installations may cause interference. Whether surface investigation is sufficient or deep surveying is needed follows the ground disturbance and grounds for suspicion. A borehole clearance record is kept with its point location and documented depth range. Where measurement conditions are restricted, the further approach is justified technically. The project file records the decision and remaining outstanding areas together with the associated plan.
Time or space conditions may affect preparation and execution. Pass on relevant land-use documents early. Explosive ordnance and forestry tasks remain assigned separately. Those involved agree which prerequisite must be met before which step.
Forestry coordination may concern land take, access and further requirements for use. The responsible bodies receive a specific project description for this. The explosive ordnance specialist contractor addresses the agreed investigation scope. Forestry and nature-conservation assessments are assigned to the specialists appointed for them. Coordination brings the results together for the construction sequence: who provides which document, which prerequisite affects which work stage, and when is the decision made? This assignment remains available when the design changes and is updated with those affected.
Show on the site plan which areas are needed for access and equipment. Describe the groundworks planned for this. Existing findings and requirements are compared with this ground disturbance. Preparation is thus considered as a specific task, rather than only the later main construction works.
A prepared access road and the main construction area may have different investigation scopes. Compare the results documents with the next proposed works. Conclusions that already apply are used. Further areas or greater depths are assessed by specialists before construction there.
Historical aerial photograph assessment and other old records help place the basis for suspicion in its spatial context. The available images, their evidential value and the limits of the area considered matter. The absence of an identifiable indication must be distinguished from a technically surveyed ground area. The assessment is considered together with the planned intervention and other available findings. It can support the choice of a survey, but is not a measurement of the present-day subsurface or confirmation for all future works.
Understand aerial photograph assessmentMagnetometric methods detect magnetic anomalies. Whether they can address the specific survey task depends, among other things, on the expected objects, ground conditions, interference and required survey area. Fences, utilities or existing structures may affect interpretation. A measurement signal is therefore not described as ordnance solely because of its strength. Method, interpretation and any further investigation are planned as a connected specialist task.
Understand the scope of magnetometryElectromagnetic investigations can be suitable for particular metallic targets and site conditions. Their suitability must be explained for the task, rather than inferred simply from the availability of equipment. Interfering installations, accessible areas and the findings required must also be considered. Results are documented with their location and survey conditions. The specialist assessment determines whether a supplementary method is needed; this remains a project-specific decision.
Understand electromagnetic surveyingUnder suitable conditions, ground-penetrating radar can provide information about subsurface structures and reflections. Ground conditions, moisture, installations and the particular survey task affect interpretability. An anomaly is not automatically ordnance, and an area with no apparent anomalies is not general evidence for arbitrary depths. The specialist interpretation and its limits are documented with the instruction. A survey for another purpose is not adopted without checking as ordnance evidence.
GPR and limitationsFor deeper groundworks, it may be necessary to establish whether a surface investigation can provide the required findings or another approach is needed. Preparation includes the location, depth, borehole layout and existing services. Creating access for the investigation must also be properly planned by specialists. A general depth figure or standard grid cannot replace that work. Findings remain limited to the areas actually investigated and the method used.
Prepare deep interventionsIf a necessary preliminary investigation cannot be completed, the specialists assess whether a planned approach during construction is suitable. This includes coordinated investigation, interpretation and communication of findings within the intended work sequence. Visual observation of excavated material is not an interchangeable substitute for a necessary survey. Site management needs a clear description of when specialist work will take place, how new findings will be handled and which areas remain unresolved.
Agree the approach during constructionIf you wish to have an area suspected of containing explosive ordnance in the Freiburg administrative district examined, draw the planned ground disturbance on the site plan. Historical assessment and technical investigation are related to the volume of ground described. Official information and earlier investigation reports are compared with the planned area. Present-day woodland use alone demonstrates neither explosive ordnance contamination nor its absence. Unknown former uses must not be replaced with assumptions.
For surveying, the investigation objective, depth of ground disturbance and local measurement conditions matter. If access must first be prepared, this work stage must also be included in specialist coordination. The investigation method is not determined solely by vegetation or a preferred construction date.
Inaccessible areas and those that cannot be sufficiently assessed remain identifiable in the documentation. Whether further investigations are needed later is clarified from the ground disturbance planned there. Explosive ordnance surveying during construction is not an automatic substitute for every missing preliminary investigation.
Identify the construction project and mark the construction area, access roads and additional working areas on the site plan. Initial contact records the location, next groundworks and investigation objective. The document review assigns existing explosive ordnance reports and conditions to the current areas and depths.
Describe preparatory steps involving ground disturbance. Mark depths and areas still unresolved. Where supporting information is missing, historical research and aerial photograph analysis are carried out. Method selection follows the grounds for suspicion, target objects, depths, interference and access.
Provide existing explosive ordnance reports and requirements relevant to access and land use. The agreed surveying or suitable monitoring addresses the defined areas. Specialist assessment assigns findings and investigation limitations to the planned works.
We review the explosive ordnance task and prerequisites for a suitable investigation with you. The report and location appendices, and the clearance record where clearance work was carried out, document the scope. The decision on subsequent steps defines further specialist works or coordination for outstanding areas.
A result along an access road does not automatically describe the adjoining construction area. Conversely, existing investigations can be considered if their documented scope covers the proposed works. For this review, location and depth matter as much as the report's limits of conclusions.
The pages for Freiburg, Villingen-Schwenningen and Konstanz add information on other construction preparation questions. For woodland projects, it remains decisive to discuss necessary preparatory works and specialist responsibilities early. A regional name replaces neither a property assessment nor a forestry-law decision.
The initial enquiry identifies the specific project location, cadastral plots and proposed works. For several construction sections, the plan also shows the sequence and connections between areas. Available results and areas still needing clarification can then be assigned. Execution considers requirements of the respective responsible bodies. The contact for the explosive ordnance task remains distinct from the contact for a forestry approval. Jointly agreed handovers give site management the information needed for its next decisions.
We assess the planned groundworks against the available documents and their design revision. Before attending site, we agree with you what needs to be investigated, which areas are accessible and what findings are required. If the design or site conditions change, we check whether the agreed scope remains appropriate. The report states what was actually investigated and the limits of the findings. This allows designers and site management to see which findings they can use and where questions remain.
Discuss the investigation taskWe first establish the investigation objective: which question must it answer? We then select a technically suitable method. The availability of a particular device or experience on a similar neighbouring site is not enough to justify the choice of method on its own.
Inaccessible areas and limited conclusions are identified. They do not disappear into a total area figure. Designers and site management can then decide specifically which areas still need attention and when a suitable survey becomes possible.
A new location, additional depth or different construction method is compared with previous results. A familiar project name does not replace this comparison. Feedback is provided before the affected work so that an outstanding question can be included in the sequence.
The technical conclusion remains connected to its location references and appendices. A brief summary helps orientation but does not replace the documented survey scope. This basis is retained even if site management or contractors change.
Record the works proposed on the access road and which have already been investigated. When later changes occur, the earlier plan and results documents are retained. This allows a check of whether existing conclusions still apply. An unchanged track name alone does not describe ground disturbance sufficiently.
Understand investigation reports and their limitationsEarlier reference points may be lost after vegetation or terrain changes. Results plans and clearly assignable area details help with further use. Site management receives the associated boundaries and limitations. Before additional works, the planned scope is compared again with these documents.
Results documentation remains connected to the work plan. It contains areas and depths addressed, methods used, measurement conditions, assessment of findings and limitations. For clearance work actually carried out, the clearance record adds the scope of that work. Document revisions and dates allow assignment even after a later area change or change in site management. Later use of the report is compared with its task and limitations. For outstanding areas, the investigation or coordination still needed before the works planned there is recorded.
Understand the service scope
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 assessment
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


Historical assessment, technical investigation and further work answer different questions. For your enquiry, describe the planned groundworks and investigation results needed. Operating conditions for infrastructure projects also belong in preparation.
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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 documentationInvestigation needs are clarified before the planned groundworks, including necessary access. Present-day vegetation alone provides no conclusion about explosive ordnance conditions. Existing findings for the area and, where applicable, a specialist-planned, documented investigation are decisive.
The approach should be clarified by specialists before preparatory works that disturb the ground. Describe the works needed for access. Their investigation needs are assessed together with existing findings; a blanket sequence would be unsuitable. The site plan, depths and existing specialist reports are reviewed together. The sequence connects necessary historical assessment and method selection with investigation, assessment and documentation.
A forestry-law decision and technical explosive ordnance investigation have different tasks. Existing requirements are considered during preparation. Evidence of an investigation must relate to its actual scope.
The Forest Policy and Forestry Directorate for Public Bodies unit describes statewide duties. The responsible body for the specific forestry question must be clarified. The Baden-Württemberg explosive ordnance disposal service is separately based at the Stuttgart regional authority.
If possible explosive ordnance is found, stop the affected works immediately. Leave the object untouched, keep your distance and warn others without putting yourself at risk. Notify the police immediately on 110 and follow their instructions. Do not attempt your own investigation or recovery.
Describe whether the track is to be used unchanged or, for example, widening, soil replacement or drainage works are proposed. Methods, terrain, vegetation, installations and the investigation objective also determine investigation conditions. Access on foot does not establish complete measurement feasibility.
The report and location appendices show areas addressed, depths, results and investigation boundaries. The clearance record is included where clearance work has actually been carried out. Site management receives the documents with outstanding tasks for further ground disturbance.
Usable documents, research needed, areas and depths, access and interference determine the work involved. Analysis, documentation and any investigation of findings form part of the agreed scope. State KMBD services and private specialist commissions are considered separately.
Show access roads, working areas and planned ground disturbance on the site plan. Add the address, cadastral plots, routes and boreholes, depths of ground disturbance and construction dates.
Include explosive ordnance reports and relevant land-use documents. Send conditions, aerial photograph assessments and utility plans with their revision status. Identify the project status, contacts and decision sought.
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.