Project pathway
The quickest route to the right decision.
Explosive ordnance assessment in Ravensburg where records are unclear
A general risk area and an earlier aerial photograph assessment with a favourable result may concern the same location. Project owners, designers and site managers need complete documents to assess dates, area boundaries and the actual conclusions together. FONTANA-EOD supports specialist comparison and the investigation commission derived from it. Send both pieces of information with the current ground disturbance plan. Existing usable knowledge is retained; missing information and investigations actually needed in addition are identified for the affected volumes of ground.
Establish the information's source.
Read the specific result.
Define the specialist commission needed.
Assess the construction project
How are apparently different explosive ordnance statements in Ravensburg clarified?
General area information and a specific investigation report are read together with their respective scales, dates and spatial references. What matters is the conclusion actually relevant to the planned groundworks. Missing reports or appendices are specifically obtained. Further measures follow the questions still open after this comparison.
Project site
Identify Ravensburg and the actual project location
Read Metzgerstraße/Möttelinstraße in context
The plan version from 2010/2011 identifies a risk area alongside the specific aerial photograph assessment with a favourable result. Both statements are considered together. New works require the project's own areas and complete documents. The local planning case thus provides a research reference, rather than a general conclusion for other Ravensburg plots.
Ravensburg is a major district town in the Ravensburg district and the Tübingen administrative district in Baden-Württemberg, Germany. A specialist commission identifies the specific project address and actual municipality. For projects in surrounding areas, local responsibility follows each location. The earlier assessment for Metzgerstraße/Möttelinstraße is distinguished from other plots. For those plots, their own documents and proposed groundworks are assessed together.
Local context
Assign risk areas and investigation results on a technical basis
Read risk information and the specific result together
The Ravensburg explanatory statement for the Metzgerstraße/Möttelinstraße development plan, in its version dated 29 November 2010 / 11 February 2011, contains both statements: the planning area lies in an explosive ordnance risk area or buffer zone. It also identifies an aerial photograph assessment by the explosive ordnance disposal service with no indications of unexploded bombs. In this respect, no further measures were considered necessary there.
Relate the conclusion to the project's own construction area
Reading only the general area information overlooks essential information. Conversely, the conclusion at that time cannot be applied to all of Ravensburg. A new enquiry requires the complete local report and the design for the project's own construction area together. Where boundaries differ or conclusions are unclear, clarify the facts before defining a technical measure.
For this location, the planning statement describes a former soap factory operating from 1903 to 1972, an abattoir from 1903 to 1993 and fill from the first half of the 20th century. This local history of land use and ground conditions may be relevant to present planning documents. Contaminated land and explosive ordnance conclusions remain separate specialist assessments. The aerial photograph assessment reported in the plan is read with its own task and result at the time.
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: Ravensburg: Metzgerstraße/Möttelinstraße, plan version 2010/2011 · City of Ravensburg: land-use plans and local regulations.
Planning and documentation: BFR KMR: principles of clearance planning · BFR KMR: geophysics · BFR KMR: documentation · 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?
Clarify the available records before selecting a method
A general risk reference and a favourable assessment are considered together by specialists. This does not establish a general commission for new measurements. First determine the question still open for the present project. Only then are necessary additions and suitable methods agreed for the specific task.
Determine additional methods from the outstanding taskRecord technical prerequisites suited to the task
If on-site investigation is needed, access, installed structures and possible interference must be known. Add existing-site plans and the proposed construction sequence. The achievable investigation scope is assessed by specialists. Inadequately investigated subareas are documented and clarified further before affected works.
Compare investigation methodsProject types
Connect risk maps, specialist reports and construction design traceably
Record the source of each statement
Provide the map, planning statement and existing specialist report together. Record the date and issuer where identifiable. A general overview may reflect a different knowledge base from a specific assessment. Specialist review clarifies this relationship before deriving an investigation commission from a single marking.
Check whether later additions or statements exist for the same area. A present ground disturbance drawing may have different boundaries from the earlier commission. Those responsible clarify the knowledge needed for its use. Missing appendices are specifically requested. For a technical investigation, first define the actual outstanding question; usable older findings remain part of the basis with their original reference.
Identify the provenance and scope of the documentsObtain the specific result with its limits
A planning text may refer to an earlier assessment and summarise its result. Precise comparison requires the complete report and appendices. These must identify the area investigated and underlying task. A brief account does not replace all details needed for present use.
Also enclose the legend and known later additions. If a wider surrounding area is included in the assessment, it remains distinguishable from the commissioned area. The meaning of boundaries is taken from each report. For new ground disturbance, relate the spaces required to these details. An unresolved reference is passed to those responsible as a specific question.
Document findings and their limitationsPass the clarified information to site management
Reports and maps are handed over with the current ground disturbance design. Keep clear which conclusion applies to which area. Further tasks are identified separately. Even in a later planning round, this keeps traceable why general information and a specific result may be worded differently.
Record each version used and its reference to the construction section. Where several specialist investigations are involved, keep clear which question each report answers. If the design changes, pass it to the affected specialist planners. New responses receive the same spatial reference. Outstanding tasks are identified with their location and conclusion required so that they can be addressed before the respective ground disturbance.
Document findings and their limitationsPreparation
Prepare the scope and commission together
Establish what needs to be known before commissioning the work
For the commission, first define the outstanding question. A risk map may have a different stage of progress and spatial accuracy from an investigation report. Within the agreed specialist commission, FONTANA-EOD reviews existing information and its relevance to the present construction task. A favourable assessment is considered within its actual scope. Further specialist services follow the information or investigation gaps remaining afterwards. Identify the next groundworks rather than commissioning a particular method solely from a coloured area marking.
Define the specialist taskCoordinate preparatory work with the investigation
The design shows foundations, utility connections and necessary preparatory works with locations and depths. Existing reports are checked for coverage of these spaces. Additional working space or a moved access route may need a separate comparison. Communicate known installed structures and restricted access. Those involved clarify necessary investigations and protective measures before preparatory ground disturbance. The accessible area and subareas still outstanding remain traceable for the next phase even when another construction section has already been adequately addressed.
Clarify preparatory work in the programmeAgree a clear scope and schedule
For execution, record the specific work each report concerns. General area information and area-specific assessments are retained with their sources. An outstanding edge area receives a traceable specialist work requirement. New investigations are agreed only for the conclusion actually needed. Site management receives complete results with associated maps. If location or depth changes, compare the new volume of ground with previous knowledge before the respective work and address it additionally where necessary.
Discuss the scope and scheduleTasks at the site
Bring differing statements together clearly
01
Assign the general reference
Record which map, planning statement or information source provides the risk classification. An overview and detailed investigation do not necessarily have the same scale or knowledge base. If a marking's origin is unknown, clarify it first; colour alone does not define an executable investigation commission.
02
Obtain the underlying assessment
If a development plan identifies an aerial photograph assessment already carried out, request the complete specialist report. This allows the area considered and possible limitations to be checked. A conclusion reproduced in the planning statement may help locate the right document but does not always reproduce every detail.
An index may help locate a report. Ask for the associated location appendices and identify any incomplete version. Enclose the current ground disturbance plan for the present comparison. Unresolved boundaries remain identifiable. A specialist conclusion is retained with its original task; use for additional spaces is reviewed separately.
03
Request older plans specifically
Ravensburg expressly describes its online service as containing legally effective land-use plans and local regulations from 1 January 2018 onwards. Inspection at the City Planning Office in the Technical Town Hall is also available. Older cases may therefore require a targeted enquiry. A missing online entry establishes neither that no investigation ever took place nor that adequate knowledge is already available.
In the enquiry, state the earlier plan name, known period and plot reference. Even an old report may contain important findings. Present use requires its complete appendices and relevance to the current construction task. An unavailable document remains a document acquisition question. This alone establishes neither a favourable conclusion nor the scope of an additional investigation needed.
04
Show the planned work spatially
Locate foundations, utility connections and other ground disturbance on the site plan. State intended depths as well. The specialist commission can then relate to the areas actually proposed for use. Naming an entire development area is often too imprecise, especially if your project concerns only part of it.
Project documents
Documents that establish the next step
Request older planning documents specifically
The city's online service identifies legally effective land-use plans and local regulations from 2018 onwards. Older cases may therefore require inspection at the City Planning Office. Provide the plan name and plot reference. A missing online entry is treated as a reason to research, rather than a conclusion about the investigation status at the time.
Define the project's own ground disturbance area precisely
Show foundations, utilities and preparatory groundworks with locations and depths. A general area name may cover several differently assessed areas. The specialist planner compares the areas actually affected with existing conclusions. New or adjoining ground disturbance is explicitly considered.
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 apparently conflicting statements together
Send both documents and describe the outstanding question. Enclose the plan of proposed ground disturbance. The comparison can then account for differences in scale, boundaries or investigation purpose. Missing appendices are specifically requested before a wider service scope is defined.
Commission the remaining work traceably
After review, establish the information or investigations still needed. The commission identifies affected areas and the conclusion required. Results are handed over with documents still in use. A later design change is compared again before execution.
Method selection
Select methods according to the task and survey conditions
Historical records and aerial photographs
An existing historical aerial photograph assessment is read with its investigation area, source images and conclusions. Its relationship to the general risk information is clarified using date, source and spatial scope. If historical questions remain open, the necessary research or additional aerial photograph assessment is actually carried out. New findings are assigned to the present construction area and used in investigation planning. A favourable earlier result is considered within its documented limits. Missing information remains identifiable as a specific question for further work.
Understand aerial photograph assessmentMagnetometric survey
Geomagnetic surveying passively measures the magnetic field. An object's magnetic effect determines detectability; electrical conductivity alone is insufficient. Known utilities, reinforcement and other magnetically active structures inform method selection. A specific investigation question for the respective volume of ground is a prerequisite. The general risk entry alone does not define a measurement commission. Actual measurement conditions and interference inform analysis. Areas addressed remain documented with the conclusion reached and outstanding tasks.
Understand the scope of magnetometryElectromagnetic methods
Transient electromagnetic methods, or TDEM, assess the time-dependent electromagnetic response of conductive objects. Suitability depends on the investigation objective and actual measurement conditions. Metal structures and utilities are included in preparation. For an additional foundation or utility connection, define the volume of ground required. Existing measurement results are checked with their analysis and associated areas. A favourable earlier aerial photograph result and technical measurement remain distinct forms of specialist evidence. The additions needed follow from the specific question still open.
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. Detected structures need specialist interpretation; a measurement image alone does not identify explosive ordnance. Identify the information needed for construction planning before investigation. For older maps or reports, clarify the space and question covered. Further use follows the documented conclusion; uncertainties are agreed with the specialist planner before the affected ground disturbance.
GPR and limitationsDeep-ground and downhole surveys
For deep foundations, boreholes and shafts, establish the conclusion needed at the proposed depth. A necessary deep-ground or borehole survey is agreed with point locations, depths and reference elevations. Utilities and other known structures remain considered. Clearance for a borehole, or the technical evidence, applies to the space actually investigated. A moved point is compared with the result before execution. Those involved receive usable knowledge and outstanding areas with a common drawing revision.
Prepare deep interventionsSurvey during construction
If a necessary preliminary investigation cannot be completed in full, further specialist work is planned for the affected area. Explosive ordnance investigation during construction may combine investigation, necessary excavation in layers, specialist exposure and additional surveys. Access and construction states are coordinated for this. Merely watching the works is insufficient as detection. Results relate to the volumes of ground actually addressed. Such an additional commission follows from technically established needs, rather than only from an older map showing a general risk area.
Agree the approach during constructionTechnical assessment
Derive further steps from existing knowledge
Assess the historical findings first
An existing Historical aerial photograph analysis may clarify the general risk reference for its investigation area. Its actual conclusions are decisive for further steps. A favourable finding does not automatically lead to new measurements; equally, an unresolved question must not be bypassed by selecting one favourable sentence.
Commission measurements only with justification
If Surveying is required, agree the objective, area and technical prerequisites. Surface conditions and interfering structures may affect investigation. The selected method must suit the respective question. Remaining limitations belong in documentation so that they can be considered during later construction.
For phased work, record which area was actually accessible and investigated. An area available later initially remains a separate identified task. Known measurement interference is documented with its relation to the conclusion reached. The next construction phase receives the available status and knowledge still needed. A common site plan connects these details without extending the limits of individual results.
Place necessary measures before ground disturbance
Any necessary Clearance plan should identify which investigation or clearance must precede the respective groundworks. Preparatory soil removal may also be relevant. Merely observing ordinary excavation is not an equivalent substitute. Suitability of explosive ordnance clearance during construction is checked for the specific commission.
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 clarifying documents to a defined specialist commission
Provide both statements
Send the risk map and document containing the specific result together. Briefly describe the apparent conflict. This helps specialist interpretation and prevents one side of the available information being missing from initial coordination. Identify missing appendices explicitly. Initial contact identifies the project location and conclusion required. 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.
Establish relevance to the construction area
Next, existing conclusions are assigned to the proposed area of ground disturbance. Differences may arise from different area boundaries or questions. Only once this relationship is traceable can it be decided what information remains missing and whether further specialist work is needed. 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.
Agree the remaining work needed
The commission follows the questions still outstanding after review. These may involve additional preliminary investigation or technical investigation. Official requirements must still be observed. Necessary prerequisite services and access to the investigation area must be agreed in good time for scheduling.
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.
Hand over results clearly for execution
Provide site management with the relevant reports and maps. It should be clear which areas have been adequately assessed and which may not yet be worked on. If further ground disturbance is then planned, check its coverage again; the earlier conclusion does not automatically expand.
Documentation
The responsible state service and your specialist commission
Findings and their scope
The explosive ordnance disposal service at the Stuttgart regional authority is also responsible for Ravensburg. Its statewide duties include advice, searches and recovery within available capacity against reimbursement of costs. If it cannot undertake these works, private specialist contractors must be involved. The state service renders recovered explosive ordnance safe.
Project responsibilities
Agree specialist services for the outstanding questions of your project with FONTANA-EOD. Assessment considers the source, accuracy and actual scope of a risk marking and existing report. The BFR KMR guidelines apply within their federal scope and may provide technical planning guidance outside it. Applicable local requirements are clarified for the specific project with the responsible authorities.
Working approach
How FONTANA-EOD works
Document the agreed specialist service clearly
Within the agreed specialist commission, FONTANA-EOD reviews existing knowledge and the resulting work needed. Identify the next construction phase and conclusion required. A risk marking is considered together with the specific result and present ground disturbance. The commission distinguishes document acquisition, necessary additional preliminary investigation and technical investigation. Existing usable results remain available with their appendices. Site management receives the stage reached and tasks still to be clarified before the respective work.
Discuss the investigation taskThe task before the equipment
The specialist planner defines outstanding investigation needs using location, depth and actual limits of knowledge. A general overview and individual summary conclusion are read with their complete supporting information. The suitable method follows the conclusion required and measurement conditions in the construction area. Additional investigations are bounded spatially and agreed with their prerequisites. Those responsible for the commission receive this common basis before affected preparatory works and groundworks.
Keep limitations visible
If a marking cannot initially be assigned unambiguously, request its source, legend and earlier stages of work. Inaccessible or inadequately investigated volumes of ground remain documented by location. The nature of the gap determines the next specialist task. A missing report section may be clarified through the complete document; an investigation area actually outstanding requires the further work defined for it. Site management can distinguish these cases in the status handed over.
Clarify changes before intervening in the ground
If an excavation, connection route or required depth changes, compare the new design with existing results before ground disturbance. Identify the additional task and applicable version. FONTANA-EOD agrees the additional investigation scope with you. Earlier results remain tied to their original space. New assessments are updated with area boundaries so usable evidence and outstanding tasks remain traceable when contractors change.
Hand over the report and plan together
For execution, provide risk information, the complete specialist report and current ground disturbance plan together. Identify recipients in specialist planning and site management. A summary is used with its supporting information. For a later extension, compare the new spaces with the documented status. Maps and reports remain in the project file with their versions. Investigations still needed and their prerequisites are handed to subsequent participants with their specific locations.
Understand the results
Use technical statements for the next decision
Distinguish area information, investigation findings and actual finds
A risk marking's meaning follows from the map and its explanations. It must be distinguished from a confirmed find and the result of a specific investigation. Read the underlying documents in full. Further planning follows the specialist assessment of knowledge for the project's own construction area.
Understand investigation reports and their limitationsRetain a favourable result within its scope
A favourable conclusion is adopted with its task and area boundary at the time. Specialist review clarifies whether it can be used for the present ground disturbance. Missing or differing areas still require separate work. Neither a general reference nor an individual summary conclusion replaces this complete comparison.
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 risk information in Ravensburg planning documents
Does an explosive ordnance risk area already mean a confirmed find?
No. Area information must be distinguished from a specific find and specialist assessment of an individual construction area. Check the associated documents and the conclusion described in them.
Why does the Metzgerstraße/Möttelinstraße plan identify no further measures?
The explanatory statement at that time refers to an aerial photograph assessment with no indications of unexploded bombs and derives this conclusion from it. It applies within its described context and is not a general assessment of all Ravensburg plots.
Where can older Ravensburg planning documents be inspected?
The city provides land-use plans and local regulations at the City Planning Office in the Technical Town Hall. The specified online service covers legally effective documents from 1 January 2018 onwards; request older cases specifically.
Is surveying always required despite a favourable assessment?
This cannot be required as a general rule. The existing assessment is compared with the planned ground disturbance and applicable requirements. Technical investigation must be directed at the needs remaining from that comparison.
What should the construction site do if a suspicious object is found?
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.
Which details help clarify an unclear risk marking?
The complete map, its legend, date and source, and the current site plan enable targeted assessment.
Why is the specialist report behind a planning statement needed?
The summary does not always contain every detail of the commission, area investigated and limits of conclusions.
Which cost factors matter where risk information is unclear?
Relevant factors are obtaining complete maps and reports, clarifying their sources and spatial references, historical questions still open, size and depth of affected ground disturbance, access and preparatory works, suitable methods and interference, and analysis and documentation. The commission follows the needs actually remaining. A general risk marking does not automatically trigger new measurements. Additional areas and initially inaccessible spaces are agreed with their specific scope.
Project enquiry
Prepare the first technical discussion
Send both statements together
Enclose the risk map and specific specialist report with appendices.
Assign each statement its date, issuer and known spatial reference. Enclose the complete report and appendices, marking missing parts. Send the current ground disturbance drawing with depths and reference elevations. For the enquiry, identify the next construction phase, conclusion needed and coordinating contact. Communicate known installed structures and access restrictions so that the further specialist task can be agreed specifically.
Identify the outstanding question
Show the affected ground disturbance on the current plan with location and depth.
Mark additional working space and preparatory ground disturbance. Distinguish outstanding alternatives from the proposed arrangement. An existing investigation report is handed over with the result actually achieved. For new works, identify the task, area and prerequisites needed separately. Those involved receive the same drawing revision and information still needed for the next groundworks. Technical additions relate to the spaces and questions still outstanding. 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.
