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Overview of Position
Background:
The Aden fishing harbour, located in Yemen & its a critical hub for economic & maritime activities in Yemen, undergoing significant rehabilitation & development. Accurate topographic data, coupled with a review of existing survey documents & drawings, are essential to support these efforts. This includes assessing surveys related to sanitation, sewerage, electrical infrastructure & roads. Aden harbour, located in the Al-Tawahi district of Aden governorate, Yemen, is one of the country’s most critical maritime & economic hubs. Originally established in the late 1970s & operational since 1986, the harbour covers an area of approximately 96,612 square meters & is a central fishing & trade hub. It connects the eastern & western coastal governorates, facilitating not only the movement of goods & people but also sustaining the livelihoods of many in the region. Despite its importance, the harbour has faced significant challenges in recent years due to prolonged neglect, conflict related damages & a lack of regular maintenance. Key infrastructure components, such as sewerage & sanitation systems, water supply networks, drainage, electrical systems, firefighting systems, road networks, have deteriorated & require urgent rehabilitation or complete redesign. Given the scope of the rehabilitation project, accurate & updated topographic data are essential to inform, guide the design & execution of infrastructure works. The availability of reliable data will also facilitate decision making for both short term repairs & long term development strategies. The current requirements are:
- Verifying & linking existing benchmarks with updated ones.
- Conducting a comprehensive review of previous survey reports & Civil 3D files for topographic & bathymetric survey.
- Carrying out a detailed topographic survey to provide accurate data for rehabilitation & new designs.
- Covering all infrastructure components, including sewerage, sanitation, water networks, drainage, electrical systems, firefighting systems & roads.
This initiative is expected to restore the harbour’s capacity to support economic activities, improve public services & contribute to the overall development of the region. The dockyard landing site operates as an integrated production unit, specializing in fish landing, preparation, freezing & preservation. It is located in the Al-Mualla district, with the Sea of Aden’s inner port bordering its northern side & the company’s shipyards to the west. The site covers an area of approximately 30,300 square meters. The Ministry of Fisheries, in collaboration with the People’s Republic of China, developed the site’s components in 1978. As a state owned facility, the dockyard landing site holds significant economic & social importance due to the essential services & facilities it provides to fishermen & investors in the fisheries sector. It stands as one of the most vital fish landing centers in the Aden governorate, playing a key role in stabilizing fish prices in the local market. The dockyard features a 52 meter fish landing berth (quay wall) & a refrigerator with an 800 ton capacity, which includes a fish processing plant. The plant is equipped with three fish freezers, each with a capacity of 10 tons per day, as well as an ice plant with a production capacity of 42 tons per day. Additionally, the dockyard houses two auction halls, a fishermen’s hostel, an administration building & a fuel station. The dockyard quay wall consists of gravity plain concrete block with 52 m & width about 7 m which have shown some defects in the form of significant deflection at the quay wall surface & various cracks that have also appeared on the quay wall surface. The quay wall has been suspended for quite a long time & is now impacted by the conflict & lack of maintenance & / or replacement. In addition, the safety of mooring large & small boats is compromised either because of the lack of restoration of the quay wall & / or broken down communication & equipment systems & insufficient depth to accommodate large boats. A project for the restoration & rehabilitation of the dockyard quay was implemented more than 40 years ago. However, it appears that the restoration & rehabilitation work was not carried out according to specifications, which has resulted in the reappearance of significant defects. The main issues affecting the quay wall relate to the damages, mentioned in the foregoing, suffered by the facilities during military operations in Aden in addition to lack of maintenance & spare parts. During the period 2018, a technical committee from the dockyard has assessed & raised more than one report for the defects in all the structure elements such as the tie capping beams & deck The defects include cracks in the concrete cover, corrosion in the steel bars, fenders missing, cracks a& exposed steel bars in the deck & tie beams. Based on that, maintenance was done for the deck only but rehabilitation work was not carried out according to specifications, which has resulted in the reappearance of significant defects. To ensure that the rehabilitation efforts are effective, modern & sustainable, detailed technical assessments are required. These assessments include topographic, bathymetric & hydrographic surveys to provide precise data on land & underwater conditions, enabling informed decision making for infrastructure design & rehabilitation. Accurate mapping of elevations, contours, underwater topography, sedimentation & tidal impacts will serve as the foundation for restoring the harbour’s operational capacity & safety. The engagement of a Survey Engineer is essential to provide expertise in verifying existing survey documents, addressing identified gaps to get the a detailed topographic survey for accurate rehabilitation & design data for Aden fishery harbour & conduct a topographic survey for the area near the quay wall about 800 m2 & bathymetric survey for basin area near the quay wall for the area about 9,200 m2 using an echo sounder for the al dockyard.
Role Objectives
The primary objective is to engage a Survey Engineer to:
For Aden fishery harbour:
- To conduct a comprehensive topographic survey, validate & analyse existing survey documents, Civil 3D files & review infrastructure surveys for sanitation, sewerage, electrical systems & roads to provide actionable data for the harbour’s rehabilitation.
- In addition, review the bathymetric survey for the quay wall, perform any necessary corrections & conduct additional surveys as required.
For al dockyard:
- Conduct comprehensive topographic survey & produce a topographic map that show contour lines, level, boundaries, features, existing facilities, that located beside the quay wall with area about 800 m2.
- Fixed survey control points / benchmarks (3 points at least) using proof vandal concrete base & drilled blots.
- Carrying out bathymetric survey for the basin area surrounding the dockyard quay wall to assess the depths of the water using accurate electronic survey equipment by eco sounder sensor (the area about 9,200 m2) with producing
- Topographic map that show contour lines, level, boundaries, features, existing facilities, that located beside the quay wall.
The consultant will perform the following tasks:
Task 1: Document review & verification:
- Analyse existing survey reports (topographic & bathymetric) & Civil 3D files for accuracy & completeness.
- Address data gaps & inconsistencies in infrastructure systems.
- Gather all data & establishment of baseline condition on tide, current & sedimentation at & around the proposed dredging area.
- Verify existing benchmarks & align them with UTM coordinates.
- Establish new benchmarks & link them to the network, with documentation & maps.
Task 2: Comprehensive field survey for the missing information & data processing & mapping for Aden fishery harbour:
- Conduct a detailed topographic survey of the missing areas with capture data on sewage, sanitation, water supply, drainage, electrical systems, firefighting, tress & roads using advanced equipment.
- Conduct the bathymetric survey for the missing area.
- Integrate new data with Civil 3D files, produce topographic & infrastructure maps. In addition, provide a detailed contour line, profile & cross section each 10 m.
- Create as built drawings reflecting current conditions with provide a comprehensive report summarizing findings, updated data & recommendations.
- Address critical issues & suggest solutions for rehabilitation & design.
- Benchmark (BM) pillars shall be established precast concrete blocks of size 30 X 30 X 60 cm & shall be embedded to a depth of 30 cm into the ground.
- Collaborate with the project team & local authorities.
- Provide regular progress updates & key findings.
Task 3: Comprehensive field survey & data processing & mapping for al dockyard:
- Carrying out topographic for the dockyard quay wall using accurate electronic survey equipment (total station) measured by square meter of the site area.
- Produce topographic map that shows contour lines, level, boundaries, features, existing facilities, that are located beside the quay wall. In addition, provide a detailed contour line, profile & cross section each 10 m.
- Fixed survey control points / benchmarks (3 points at least) using proof vandal concrete base & drilled blots.
- Carrying out bathymetric survey for the basin area surrounding the dockyard quay wall to assess the depths of the water using accurate electronic survey equipment (total station if its applicable as the depth is shallow or eco sounder sensor). The equipment shall be checked periodically for horizontal & vertical collimation. The candidate should provide his own devices.
- Produce map that show contour lines, level, boundaries, features, existing facilities, that located beside the quay wall & map underwater topography of the harbour basin & around quay walls.
- All coordinates should be global & the elevation linked with chart datum.
Detail requirements:
- All site plans shall be geo referenced using the WGS 1984 coordinate system, specifically the following WGS 1984 UTM with country specific zone. If the designer is not able to use the stated coordinate system, the coordinate system used shall be correlated to the stated coordinate system.
- Total station with angular accuracy of 2” / 3” & distance accuracy of 1.5 mm + 2 ppm should be used for the detailed survey.
- Providing the raw data from the survey instrument.
- Ground levels should be recorded at appropriate intervals to provide contours at 0.5 meter intervals or other specified levels of accuracy. This will enable the consultancy to prepare a detailed site layout & facilitate cut & fill calculations, catchment area analysis, rainfall, runoff, drainage design & other design activities.
- Contours shall accurately represent the relief detail & topographic shapes. 90 % of the elevations or profiles interpolated from the contours shall be correct within one half of the contour interval & spot elevations shall be correct within plus or minus 15 millimetres.
- Permanent ground markers & benchmarks will be established on the site. These markers will serve as survey points of reference for the duration of the project. One benchmark shall be positioned at the edge of the site extents, with a minimum of three additional benchmarks positioned outside the site extents or more. The benchmarks should reference the chart datum (geodetic station) with traverse closing to a resolution of 1:20000 for three categories.
- The survey will be referenced to the national / grid reference system & all levels shall be referenced from the national vertical datum or, if not available, to sea level (including details such as high tide/low tide if related to sea level).
- The topographic survey & maps shall comply with relevant national or international standards for topographic mapping include those specified by the International Federation of Surveyors (FIG) standards, ASTM E3125 – 17 – standard guide for surveying for facility site design or any equivalent standards.
- A comparative study should be done with the cadastral map & should be mentioned clearly in the survey report.
- Upon completion of the detail survey, the data set should be finally edited in LISCAD see file & export to AutoCAD Civil 3D drawing. The final edited survey data/map should be delivered both in LISCAD see. shapefile, file & AutoCAD drawing with proper color codes & layers.
- The cost should be included all costs relevant to the assignment (including devices, tools, software, travel, daily subsistence, etc.), as required by our client.
- A comprehensive survey report should contain detailed information to provide a clear understanding of the surveyed area & ensure that all relevant data is accurately documented. A survey report should typically include executive summary, introduction, methodology, survey data & findings, analysis & interpretation, accuracy & precision, compliance with standards, conclusions & recommendations. Additionally, the report should cover a summary of the survey carried out, including the elements encountered & a report of the closure of the survey to the reference datum to verify its accuracy. It should also include traverse data, existing structure information, coordinates of benchmarks (BMs), a location map for BMs with photographs, site photos showing changes, raw data, a digital map in AutoCAD & all the required plans, alignments, profiles, cross sections, etc.
Each delivery will be subject to review & approval by our client & relevant stakeholders. The consultant must ensure that the quality of all deliverables aligns with the best international practices & our clients standards. Any revisions or additional information requested during the review process must be incorporated within agreed timelines.
Deliverables – see the deliverables details when clicking the link below.
The consultant is expected to adopt a participatory & iterative approach, involving:
- Prepare a methodology for his understanding the task outline in TOR.
- The consultant will thoroughly review existing assessments, topographic survey, reports, drawings & technical documentation to establish a comprehensive understanding of the sewerage & sanitation condition & the prior work undertaken.
- The approach will emphasize meaningful interactions with stakeholders to ensure alignment, address concerns & integrate their inputs into the rehabilitation framework. Regular consultations with relevant authorities, our clients representatives & technical experts will be conducted.
- Field visits, will be undertaken to validate the findings of previous assessments, observe the current structural conditions & gather any additional data needed for accurate analysis.
- The methodology will integrate international best practices in marine infrastructure rehabilitation, including sustainable & environmentally friendly techniques, ensuring compliance with applicable standards & codes.
- A robust quality assurance framework will be implemented to verify the accuracy & integrity of all deliverables, ensuring alignment with the project objectives & our clients expectations.
Project Reporting
The selected staff will work under the direct supervision of the International Chief Technical Advisor & in close coordination with our clients engineering unit & their Project Engineer. The consultant will provide regular updates to our client team in Yemen on progress, key findings & strategic recommendations throughout the consultancy period. Additionally, the governance structure will include:
- The consultant will participate in bi weekly progress review meetings with the Project Manager & stakeholders to report on milestones, discuss challenges & ensure timely resolution of issues.
- The consultant must maintain detailed records of all activities, including meeting minutes, field observations & technical analyses. These records will be submitted as part of the project documentation & will be subject to review by our client.
- All deliverables must adhere to our clients policies on environmental & social safeguards, financial transparency & ethical standards. The consultant is accountable for ensuring that all project activities comply with these policies.
Accountability will be ensured through a transparent reporting mechanism, where progress updates are shared with all stakeholders, deliverables are reviewed & approved based on predefined criteria.
Key Competencies
- Degree in civil engineering, surveying or a related field.
- At least 7 years of experience conducting detailed topographic surveys for infrastructure projects, including ports, roads, industrial facilities & the same experience in bathymetric surveys using advanced technologies.
- Performed at least 2 projects as a Surveyor related to ports’ or landscaping scaled projects rehabilitation & reconstruction.
- Proficiency in modern survey tools (total station, GPS & echo sounders) & software (AutoCAD Civil 3D).
- Experience conducting surveys for harbour dredging or quay wall stability assessments & in infrastructure surveys for sewerage, water, electrical, drainage & roads.
- Experience in development of compressive topographic map drawings with all contents like contours & elevations, all features with legend, tidal, water level & depth Information etc.
- Ability to work in Yemen governorates specifically in Aden.
- Strong analytical & documentation skills.
- Fluent in English & Arabic (written) is required.
- Knowledge of Arabic is an asset.
Team Management
- This role has no team management responsibility.
Further Information
Facilities provided by our client:
- Our client will provide support letters to facilitate access to the site visits, in addition to this they will provide feedback on any inquiry regarding any specific requirements.
- Our client will appoint a focal point for the assignment. All requests for information, guidance & assistance should be addressed & provided to the focal point. This includes liaison with other client units & national departments as well as access to any relevant data that is not classified as restricted.
- Other personnel from our clients organization to be assigned to the project shall be as agreed during the pre contract meeting.
Contract duration:
- The contract will be for a total of 20 working days spread over a 6 weeks period.
- Specific working days will be allocated based on project requirements, deliverable deadlines & coordination with our client.
Duty station:
- The consultant will be based in Aden, Yemen with regular participation in meetings with our client & stakeholders, will be necessary.
Scope of price & payment:
- Payment shall be provided upon satisfactory completion of the deliverables outlined in the table above.
- Payment requests submitted by the consultant & must be certified by the supervisor(s).
- Payments are to be made within 30 days from receipt of invoice.
- A certification of payment needs to be signed & approved by the direct supervisor.
Other information:
- Qualified female candidates are encouraged to apply for this role.