Project pathway
The quickest route to the right decision.
Explosive ordnance surveying in the Weser-Ems administrative district
A search corridor defines the area for further route planning. The exact utility alignment and the construction areas needed have yet to be determined within it. FONTANA-EOD supports explosive ordnance assessment for route projects in the Weser-Ems administrative district. We compare existing findings with the planned ground interventions, taking working areas and planning changes into account.
Identify the planning stage.
Record all proposed ground interventions.
Compare existing findings before earthworks.
Assess the construction project
From search corridor to the specific ground intervention area
A search corridor does not yet describe the groundworks actually required. For your project in the Weser-Ems administrative district, we compare the specific route and its ancillary areas with existing reports. Changes in alignment, construction method or depth are taken into account before the affected ground interventions.
Documented location references
Reference projects in the Weser-Ems administrative district
Select a project location on the map or in the location list. The associated entries lead to the protected reference overview.
The points indicate locations associated with documented references, not precise ordnance find or site coordinates. Several entries may belong to one project. References without a confirmed location assignment are available in the complete reference overview.
Map data: © BKG (2026), VG250 / GN250, Data licence Germany – attribution 2.0. Area outline assembled and projected from official district boundaries. Selection and project allocation: FONTANA-EOD.
Project references
Selected project examples
Bad Bentheim – borehole magnetometry
Explosive ordnance surveying – Bad Bentheim – DB track and turnout renewal – 26 FEI 85416 Bad Bentheim
Service period: 2026-04
Service areas:Downhole magnetometry / deep-ground survey
Project site
Connect the site with the specific construction task
Identify the location and section in Weser-Ems
The regional remit of the ArL describes the administrative area. For the explosive ordnance task, the specific municipalities, areas and ground interventions matter. State the project location and responsible municipality for each route section. The administrative district includes, among other areas, Emsland, Grafschaft Bentheim, Wesermarsch and the city of Oldenburg. For cross-border utility projects, sections outside Lower Saxony are assigned to their own local points of contact. Link each site plan to the corresponding document version and the decision needed before the next ground intervention.
For historical aerial photograph analysis the investigation area is compared with the planned route and its ancillary areas. Existing findings and unresolved questions are recorded for each section.
Information on explosive ordnance surveying in Osnabrück, Oldenburg, Wilhelmshaven, Emden, Delmenhorst, Lingen (Ems) and Nordhorn supports preparation of your project enquiry. Documents and planned ground disturbance on the respective property are decisive.
Local context
From search corridor to the specific construction area
Regional context and specific route sections
The Weser-Ems administrative district includes, among other areas, Emsland, Grafschaft Bentheim, Wesermarsch and the city of Oldenburg. This broad geographical classification does not yet describe a specific investigation area. For a utility route, what matters is which section is being prepared at which planning stage and which ground interventions are actually envisaged there.
The City of Osnabrück describes air raids during the Second World War and identifies railway installations and the armaments factories of the time as strategic targets. For a present-day route project, the historical documents and aerial photographs are related to the section actually affected. Former uses, subsequent changes to the ground and the planned ground intervention are considered together. The relevant local information is used for other locations.
The Emden City Archive documents the air raid of 6 September 1944. For present-day projects in the port or urban area, the available historical information is compared with the specific project area. Where documents record subsequent filling, reconstruction or other changes to the ground, these are taken into account when assessing present-day ground interventions. The information available for each individual route section remains decisive.
Windader West: corridor and subsequent detailed alignment
For Windader West, ArL Weser-Ems publishes the spatial compatibility assessment documents for the development of onshore corridors. Project developer Amprion explicitly distinguishes the corridor as a search area from the considerably narrower detailed alignment to be planned within it later. The published documents concern Amprion’s spatial planning. What matters for an explosive ordnance investigation is the commissioned specialist work and its documented ground intervention areas.
Requirements
Clarify technical requirements and responsibilities within the project
Relate requirements to the specialist task
For the commissioned activities, the applicable technical requirements and questions of permits, competence and responsibility are clarified. The services actually planned are decisive. Required permits and certificates of competence are assigned to the activities described and the responsible persons.
Link occupational safety to the construction sequence
Risk assessment, working areas and communication must match the proposed activities. Explosive ordnance specialist works are coordinated with the other construction works. Operational organisation, site and traffic safety, and other specialist technical inspections retain their own responsible parties. Joint coordination relates specialist works and responsible participants to the construction sections concerned.
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.
The ArL Weser-Ems describes the regional administrative district. The Windader West spatial compatibility assessment documents concern corridor planning across municipal boundaries. Amprion explains the distinction between the search corridor and the detailed alignment. Local responsibilities for explosive ordnance assessment are described by LGLN. Assign the available information to the actual ground intervention and the responsible municipality.
The principles of clearance planning connect the specialist task with construction planning. The specialist geophysical principles help assess methods and measurement conditions. The BFR KMR documentation requirements relate the results to the areas, depths and conditions actually addressed.
The defined remit of the BFR KMR guidelines concerns federal projects. Their technical principles are compared with the locally applicable requirements and responsibilities for the project.
For work in Germany, the permit, certificate of competence and responsibilities for the specific activity are assessed 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.
§ 7 SprengG concerns the commercial permit for activities requiring authorisation, and § 20 SprengG the certificate of competence of responsible persons. § 1b SprengG governs which provisions apply when searching for munitions that have been found. The commission identifies the planned activities and the persons responsible for them.
Working together
Distinguish the tasks of client, designers and specialist contractor
Client and operator
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.
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 contractor performs the agreed investigation and documentation work. Official requirements and decisions are clarified with the respective responsible bodies. The records needed for a specific procedure depend on the location and project. The technical report documents the specialist work carried out and its area, depth and limits of conclusions. The responsible bodies make official decisions concerning subsequent groundworks.
Municipal requirements are agreed with the municipality responsible for each route section. The state explosive ordnance disposal service supports municipalities in Lower Saxony within its remit. Local contacts and the responses required are recorded together with the relevant planning stage.
Investigation task
Which specialist task comes next?
Determine the investigation area required
The specific commission requires the alignment, construction method, working areas and depths. Existing aerial photograph analyses and technical reports are compared with these. Broad corridor planning can help establish the geographical context. By itself, it does not demonstrate that the subsequent ground intervention areas have been investigated. The commission therefore describes the technical question that actually remains unresolved.
Show the planned ground intervention, including its position and geometry. Alongside the utility, this overview includes trench widenings, excavations and other working areas. Existing reports are provided together with their accompanying plans and documented depth references. Specialist planning uses these to identify the assessment still needed and spatially define additional tasks. Where several options exist, common investigation areas and areas that differ are shown distinctly.
Assess historical documentsAgree methods for each section
Conditions can vary along a route. Access, installed structures and required depths are described for the relevant section. The appropriate approach depends on this task and the existing findings. A method used for another section is not applied without checking its suitability. Limitations remain documented in the results.
The commission records the conditions for the individual investigation section, such as existing access, known ground conditions and interfering structures. The specialist contractor checks which method can address the investigation objective under these conditions. Limitations of measurement or evaluation are assigned to the area concerned. Where a different investigation or preparation is required, it is coordinated with construction planning. The results handed over identify the work actually carried out and the tasks still unresolved.
Compare investigation methodsProject types
Record the route, crossings and ancillary areas together
The utility is moved within the corridor
A new alignment may lie outside areas already investigated, even if the overall corridor remains the same. Present the previous and new plans side by side with clearly identified versions. The corresponding reports are compared spatially. Remaining gaps are identified section by section. Belonging to the same major project does not establish findings for every option.
For the comparison, the previous and new route centrelines are shown together with the investigation boundaries. Also indicate whether the trench width, shoring or working area changes. This enables the specialist contractor to define the strip actually affected and assign applicable existing results. Identify the areas intended to be built first and the decision status needed for them. Documents for a rejected option retain their designation; the current construction plan is given its own clear reference.
Document findings and their limitations
A crossing uses a different construction method
Open excavations and trenchless crossings affect the ground differently. Describe the launch and reception areas and the ground interventions actually planned. The new construction method is compared with the existing investigation commission. Changes outside the utility line may also be relevant. Only the specific scope permits a traceable decision on results that remain applicable and additional tasks.
For a crossing, any additional planned ground interventions are specified alongside the launch and reception pits. These may include equipment areas or work to establish access. Available information on ground conditions, utilities and installed structures is assigned to the relevant areas. If the construction method changes, the affected depths are stated with their elevation reference. This information allows the investigation task for the section to be described and compared with the existing results. The next steps are established before the groundworks concerned.
Specialist services and investigation tasksAccess routes lie outside the utility line
Temporary traffic routes or equipment areas may require earthworks in their own right. Their construction and depth must be included in the preparation. A report for the utility route is not automatically extended to these ancillary areas. Assign the existing findings and identify missing areas. The spatial overview helps identify such transitions before site establishment.
Even temporary use may require excavation, surfacing or a trench. Therefore record the actual construction and subsequent removal wherever these involve ground interventions. Planning shows which ancillary areas are part of an investigation commission and which are considered separately. If they are added after commissioning, the specialist contractor receives the revised documents with a clear date. Site management and the client can then identify the results available for the forthcoming work.
Specialist services and investigation tasksPreparation
Prepare the scope and commission together
Establish what needs to be known before commissioning the work
First 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 taskCoordinate preparatory work with the investigation
Required 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.
Clarify preparatory work in the programmeAgree a clear scope and schedule
A reliable process distinguishes work already technically clarified from prerequisites still unresolved. If an area will only be partly accessible, this must be taken into account when commissioning the work. Handover and assessment of results also need time in the construction programme. Specific coordination connects the described scope with access, records, execution conditions and the date by which a decision is needed.
Discuss the scope and scheduleConstruction areas required
Include utility trenches, crossings and access routes
01
Utility and open trench
For open-cut installation, describe the ground areas and intervention depths required. The utility line alone is insufficient. Widths from an earlier corridor plan may only be adopted if they correspond to the work actually planned.
02
Launch and reception areas
For trenchless crossings, also record the working areas at both ends. The assessment requires the position, depth and geometry of the ground interventions. The investigation required cannot be determined solely from the name of the construction method.
03
Site areas and access routes
Access routes and equipment areas may lie outside the route shown. Describe the groundworks needed there for establishment and use. These, together with the existing findings, determine the investigation requirements that need clarification.
04
Alternatives and shifts
Identify unresolved options separately. If the route is shifted, the new area must be compared with the documented investigation area. This establishes which results remain applicable and which areas have not yet been covered.
Project documents
Documents that establish the next step
Identify planning versions along the route
Use clear section designations and version dates. A search area, an investigated option and the detailed construction planning must remain distinguishable. Reports refer to the version on which they are based. When a change occurs, document which parts remain applicable and where a new technical decision is needed.
Establish which plan version governs the commission and who receives changes. Each revision identifies the changed ground intervention areas. Earlier reports remain available together with their corresponding planning version. A brief change summary can bring together the affected areas and the clarification needed for the next groundworks. The technical assessment remains linked to the complete report and its appendices.
Keep interfaces between commissions visible
Where neighbouring sections are investigated separately, their investigation boundaries must be traceable. A common overview plan shows their allocation and any unresolved interfaces. The complete reports remain the basis of each assessment. Combining them organisationally does not compensate for missing areas or different depth information.
Common reference points and the required elevation reference are specified for section boundaries. Site management can then compare whether the planned work lies entirely within the documented areas. Identify overlaps and gaps on the site plan and clarify the necessary follow-on work with the respective specialist contractors. If the construction sequence changes, the order in which results are required is also agreed. Those involved receive the documents relevant to their working area. The measurement data, survey results and findings assessment belonging to the commission are linked to the complete report and its accompanying plans. After clearance work, the clearance record, stating the clearance scope, results and limitations, is assigned to the route section actually addressed.
Construction sequence
Coordinate investigation and construction sections
When moving to detailed construction planning
Compare the route now defined with the areas of existing investigations. Add crossings, access routes and equipment areas. Only this specific planning stage allows the results to be assigned to the forthcoming earthworks. Unresolved options remain clearly identified and are checked separately before implementation.
Before handing over to the next section
Hand over current planning versions and complete reports with their limitations. The next site management team must be able to identify which areas were actually investigated. Where interfaces shift or working areas are added, the new scope is compared in advance. A shared project name alone is insufficient to establish that supporting documentation applies.
Method selection
Select methods according to the task and survey conditions
Historical records and aerial photographs
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 survey
Magnetometric 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 methods
Electromagnetic 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 surveyingGround-penetrating radar
Under 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 limitationsDeep-ground and downhole surveys
For 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 interventionsSurvey during construction
If a necessary preliminary investigation cannot be completed in full, it is assessed whether a technically planned approach during construction is suitable. This includes the agreed investigation, evaluation and communication of findings within the intended workflow. Necessary surveying remains part of the agreed approach; visual checks supplement it. Site management needs a clear description of when specialist work takes place, how new findings are handled and which areas remain unresolved. For explosive ordnance clearance during construction, the DGUV FAQ explain the necessary technical investigation works. Visual observation alone does not meet the state of the art for this specialist task.
Agree the approach during constructionTechnical assessment
Which findings apply to the current planning
Aerial photographs and preliminary investigations
Historical aerial-photo analysis can provide indications for further route planning. Observe the area evaluated and the limitations of the assessment. Aerial photograph analysis does not demonstrate that every subsequent ground intervention area within the search corridor has been technically investigated.
Check which photographs, files and existing analyses actually cover the section concerned. Where historical information remains unresolved, the necessary research and aerial photograph analysis are carried out. Subsequent excavation, filling and construction over the ground are taken into account where relevant to the planned ground intervention. Findings and remaining questions are documented so that they can be incorporated into the technical investigation commission. An aerial photograph assessment and a technical investigation report remain distinguishable by their respective tasks.
Task and measurement conditions
Any necessary surveying must suit the investigation task and site conditions. Method selection therefore requires reliable information about the planned work. Even within one corridor, measurement conditions can differ from section to section.
Method selection takes account of expected target objects, soil structure, interference and the investigation depth required. Utilities, reinforcement and other installed structures are recorded using the available location information. For deeper areas, it is assessed whether a suitable assessment can be obtained from the surface or whether, for example, borehole surveying is required. Planning then identifies survey positions, depths, access and necessary preparatory work. The ground interventions involved in that preparation are also compared with the existing findings before they are carried out.
Check the clearance plan when changes occur
In the clearance plan existing results, additional investigations required and unresolved areas are recorded. When planning changes, the elements affected must be checked. Earlier planning versions remain documented so that the change can be traced.
Describe the unresolved specialist task, its spatial scope and the intended construction sequence. Results of the commissioned investigations are evaluated and linked to the actual measurement conditions. The survey report and, where applicable, the clearance record identify the work carried out, results and limitations. Next steps and contacts are recorded for remaining areas. Site management receives the complete documents for the groundworks that follow. New position or depth specifications are compared again with these results before implementation.
Next steps
Prepare investigations section by section
Agree initial contact and the current planning version
Provide the governing plan with its date and a clear section designation. Identify whether it shows a search area, an option or the specific construction planning. Decisions that remain unresolved must be apparent for the investigation. For the initial discussion, provide the project location, land parcels and the decision needed before the next groundworks. A contact person brings together the current section designations and unresolved decisions.
Review documents and historical information
Assign existing analyses, investigation reports and appendices to the relevant section. Check which area was actually investigated. Belonging to the same project is insufficient to extend a result to other areas. The complete explosive ordnance documentation is compared with the current ground intervention planning. Where historical information remains unresolved, the necessary research and aerial photograph analysis are carried out. Findings and remaining questions inform the investigation requirements for each section.
Define ancillary areas and a suitable method
Supplement utility planning with other groundworks, such as those needed for access routes and equipment areas. State the known area and depth for each location and identify missing information. The method is selected according to the investigation objective, target objects, soil structure, interference and required depth. Planning identifies the investigation areas and coordinates necessary preparatory work with local requirements.
Carry out investigations and evaluate findings
Where further work is needed, the commissioned surveys or technically planned work during construction are carried out. The specialist contractor evaluates measurement data and findings in relation to the method and investigation conditions. Areas that are inaccessible or subject to evaluation limitations remain identifiable by location. An actual suspected find leads to the affected work being stopped and the responsible bodies being notified immediately.
Document and hand over results
The documentation identifies the areas and depths addressed, methods, results and limitations. Complete reports and accompanying plans are handed over together to the agreed recipients. The section overview shows which results are available for the next groundworks.
Clarify follow-on decisions and planning changes
Report changes to alignment, construction method or ground intervention depth before the affected earthworks. It is then assessed whether existing results are sufficient, further documents are missing or additional investigation is required. For unresolved tasks, the next step needed and the responsible contact are recorded. New areas or depths are taken into account before implementation. Decisions and results handovers are given clear section and planning references.
Documentation
Document investigated areas and unresolved sections
Findings and their scope
The report must clearly identify the section, planning version used, areas investigated and limitations of the assessment. A map can show investigated and unresolved areas. When results are handed over to other parties, they still apply only to their documented scope, not the entire corridor.
Project responsibilities
The BFR Kampfmittelräumung describe the specialist identification of background information and deficiencies, and documentation within their federal scope of application. They provide guidance for other projects; the specific requirements must also be agreed. In Lower Saxony, the responsibilities of the municipality and the KBD remain separate from a private investigation commission. A spatial planning decision does not replace this site-specific clarification.
Working approach
How FONTANA-EOD works
Document the agreed specialist service clearly
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 taskThe task before the equipment
We 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.
Keep limitations visible
Inaccessible areas and limited findings are identified. They are shown separately in the report and overview plan. Planners and site management can then decide specifically which areas still need work and when a suitable investigation will become possible.
Clarify changes before intervening in the ground
A new location, additional depth or different construction methods are compared with the existing results. Changes are passed on with dates and clear plan references. Feedback is provided before the affected work so that an unresolved question can be incorporated into the workflow.
Hand over the report and plan together
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.
Understand the results
Use technical statements for the next decision
Relate investigation results to the planned construction areas
A corridor leaves room for later planning. The corresponding reports establish which subareas were actually investigated. The spatial comparison is made against the specific construction task. Even within the same search area, unresolved areas may therefore remain and need clarification before the respective groundworks.
Understand investigation reports and their limitationsDefine the technical implications of a planning change
Not every change renders all previous results unusable. What matters is which areas, depths and conditions are affected. Document the change so that this comparison is possible. Further investigation is derived from the remaining task, rather than solely from a new plan version number.
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 subsequent work answer different questions. In your enquiry, describe the proposed groundworks and the findings needed for the next intervention.
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
Explosive ordnance assessment along planned routes
Does a confirmed search corridor already demonstrate that an explosive ordnance investigation has taken place?
No. Confirmation in the planning process does not demonstrate that an explosive ordnance investigation has taken place. The existing investigation reports and their documented areas are decisive. Before construction, it must be clarified which planned ground interventions these results cover.
Can the investigation begin before the final utility alignment has been determined?
Preparatory investigations can be carried out on the basis of a defined planning stage. Their purpose, scope and limitations must be agreed. Once the utility alignment has been specified, the results must be compared with the ground interventions actually planned. Agree the investigation requirements with the specialist contractor and municipal requirements with the municipality responsible before the planned groundworks. The KBD supports the municipality within its remit. The process begins with a review of the documents, followed by the planning and execution of the necessary specialist work and evaluation of the results. Complete reports and accompanying plans provide the basis for the subsequent construction decision.
Must temporary construction areas also be considered?
If ground interventions are planned there, their investigation requirements must be clarified. This also applies to temporary use and to areas outside the utility route.
What happens if the route is shifted sideways?
The new ground intervention area is compared with the previous investigation areas. Existing findings that remain applicable can still be taken into account. Areas outside the documented coverage or with changed technical requirements need separate clarification before the affected ground intervention.
What should be done if a suspicious object is found on the construction site?
Stop the affected work, leave the object untouched and move away from the immediate area. Warn other people and notify the police immediately on 110. Follow official instructions and do not attempt to handle or transport the object yourself.
Does a report apply to the entire search corridor?
Only the investigation area documented in the report and the task addressed there are substantiated. Being within the corridor does not extend that statement. The detailed construction planning is compared with the corresponding maps and depths.
What is checked when a launch pit is moved?
The new position, geometry and depth are compared with the documented investigation scope. Changes to access and working areas are also taken into account. This establishes which results can still be used and where additional investigation is needed. Method selection takes account of soil structure, installed structures, interference and the required depth. The extent to which the data can be evaluated and any remaining limitations are documented in the results.
What information helps prepare a quotation for a route?
Clearly defined sections, the current planning stage, construction methods, ground intervention depths and ancillary areas are needed. Existing reports and known access conditions supplement the enquiry. Options that remain unresolved are explicitly identified. Area, depth, suitable method, interference, access and the required documentation affect the work involved and its cost.
Project enquiry
Discuss your route planning with us
Send the route and ancillary areas
Provide the current planning version with section designations, construction methods and depths. Include launch and reception areas, access routes and equipment areas, and existing specialist reports. If an area with suspected explosive ordnance is designated, include its boundaries and the corresponding documents. Identify the technical assessment needed for the next ground intervention.
State changes and the construction sequence
Identify shifted areas and unresolved options. State the first groundworks and the planning team responsible. The next investigation requirements are related to this specific planning stage.
For each route section, record the document version, applicable official conditions and maximum ground intervention depths with their elevation reference. Submit dated as-built and utility plans. The project overview identifies the handovers required, while the individual records document the technical assessments and their limitations. This keeps the central organisation and section-specific tasks traceable for the trades that follow.
Project process
Project processSurveying methods
Surveying methodsPlace Lower Saxony in context
Place Lower Saxony in contextPut further project regions in context
Put further project regions in contextAgree specialist services for the route sections
Agree specialist services for the route sectionsPrepare the project sequence and evidence
Prepare the project sequence and evidence
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.
