Consulting Engineers

Projects

Over the years we have undertaken a variety of projects around the globe, and have engaged in a variety of international partnerships to deliver cost-effective and innovative solutions worldwide, that would change the life of many people.
Through this time traveling has contributed to the successful completion of our projects, and has helped us understand the common problems of each society we were trying to help.
The interaction with our partners and the societies abroad keeps rewarding us with invaluable memories, a diverse work experience, fuels us with creativity, helps us build on our culture and keeps us motivated

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REHABILITATION AND MODERNIZATION OF THE IRRIGATION NETWORKS OF THE LOCAL LAND IMPROVEMENT ORGANIZATION (TOEB) OF TAVROPOS

Country: Greece
Client: AVAX S.A. - AKTSOR S.A.
Year: 2024 - On Going
Funding: EU - National Funds
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REHABILITATION AND MODERNIZATION OF THE IRRIGATION NETWORKS OF THE LOCAL LAND IMPROVEMENT ORGANIZATION (TOEB) OF TAVROPOS

Country: Greece
Client: AVAX S.A. - AKTSOR S.A.
Year: 2024 - On Going
Funding: EU - National Funds

The Tavropos irrigation project began construction in 1963 and began operating gradually from 1965, and was completed in 1973. In 1987, the project was expanded to 2,500 ha in the A’ Canals zone. In 1992, it was expanded to zones B’ and C’ with an irrigable area of 7,100 acres. The perimeter of the project amounts to 160,000 ha and the irrigable area to approximately 120,000 ha.
The water supply to the Tavropos irrigation project is provided by the Tavropos reservoir (Lake Plastira) through the Plastira Hydroelectric Station and the flow is regulated through a regulating tank with a capacity of 600,000 m3, which has been operating since 1965. The maximum water level in the tank (A.S.Y.) is +188.10 m. The maximum water discharge capacity at the Tavropos irrigation project is 16 m3/sec.
Z&A is responsible for the rehabilitation design of the total irrigation network. The network is divided into primary, secondary and tertiary. The primary network consists of the main transmission pipelines that follow the layout of the feeder canal. The secondary network consists of the transmission pipelines that branch off from the primary network and end at the water intake points of the tertiary network. The tertiary network is the distribution network in which the water intakes are placed to supply water to the agricultural area.
The total length of the primary network is approximately 23.0 km, the secondary network is 92.7 km and the tertiary network is 679.8 km (Sum 795.5 Km) The diameter of the pipes range from DN140 -DN2000.
Two pumping station are suggested (270 m3/hr and 702m3/hr)

The service covers the field of:
Field surveys – Soil surveys in areas
Hydraulic Study of the new network
Hydrological Study
Geotechnical Study
Detail Design Study
Tender Documents

IRRIGATION NETWORK OF YPERIA, LARISSA PREFECTURE – ORFANA, KARDITSA PREFECTURE

Country: Greece
Client: METLEN S.A.
Year: 2024 - On Going
Funding: EU - National Funds
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IRRIGATION NETWORK OF YPERIA, LARISSA PREFECTURE – ORFANA, KARDITSA PREFECTURE

Country: Greece
Client: METLEN S.A.
Year: 2024 - On Going
Funding: EU - National Funds

The contract signed by METLEN SA and the ministry concerns the study, construction, financing, maintenance and operation of an irrigation network at the Yperia – Orfana location for the irrigation of the lowland areas adjacent to the Enipeas River mentioned in the wider Yperia area of ​​Larissa Prefecture, as well as Orfana in Karditsa Prefecture, with a total area of ​​74,300 ha, where the Local Land Improvement Organizations (TOEB) of Titani and Farsala operate. More specifically, eleven individual irrigation networks are proposed that will irrigate a gross area of ​​74,300 ha, a net area of ​​approximately 67,800 ha, and will utilize boreholes, with a total capacity of 14,345 m3/hour. Z&A is responsible for the study of the network of the above mentioned irrigation area. The total irrigation network is 325,138 m with the diameters of the pipes (HDP) ranging from DN 110 to DN 800.

The service covers the field of:
Field surveys – Soil surveys in areas
Hydrological Study
Detail Design Study
Climate Change Study
Geological Study and Geotechnical Study
Prepare O&M Plan and Quality Management Plan
Prepare Tender Documents

FINAL STUDY FOR THE PROJECT TITLE: STRENGTHENING OF THE WATER SUPPLY OF THE MUNICIPALITY OF KARDAMENA BY THE “MIA” RESERVOIR

Country: Greece
Client: Municipal Enterprise Water Supply And Sewerage of the Municipality of Kos
Year: 2025 - On Going
Funding: National – EU Funds
Contract Value: 622,150.00 € (~717,889.00USD)
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FINAL STUDY FOR THE PROJECT TITLE: STRENGTHENING OF THE WATER SUPPLY OF THE MUNICIPALITY OF KARDAMENA BY THE “MIA” RESERVOIR

Country: Greece
Client: Municipal Enterprise Water Supply And Sewerage of the Municipality of Kos
Year: 2025 - On Going
Funding: National – EU Funds
Contract Value: 622,150.00 € (~717,889.00USD)

The island of Kos is the third largest island in the Dodecanese and the second most populous. According to the 2021 census, it has 37,089 permanent residents, with the population increasing significantly during the tourist season, which in recent years has extended from April to October. The Municipal Unit of Irakleida, in which the project un-der study is planned to be constructed, has a population of 7,467 permanent residents, of whom 2,132 live in the Municipal Community (MC) of Kardamena, 2,622 in the MC of Antimachia and 2,713 in the MC of Kefalos. It is noted that during the summer months the number of tourists exceeds 50,000.
The main characteristics of the dam and the watershed are as follows:
Dam Height 22.0 m, Homogenous Clay Core, Dam Volume (m3) 141.300 , Reservoir Volume 1.24 hm3
The capacity of the Water Treatment Plant which will be designed is 5.000m3/d, The pumping station 250m3/h

The scope of the service consists of:
Detail Design
Hydrological Investigation
Geotechnical Investigation
Geological Investigation
Topographical Survey
WTP Design
Electromechanical design
Road Design
ESIA

TECHNICAL CONSULTING SERVICES FOR FEASIBILITY STUDIES, DESIGNS, AND SUPERVISION FOR THE REGIONAL CLIMATE RESILIENCE PROGRAM IN SOUTH SUDAN / SS-MWRI-373355-CS-QCBS

Country: South Sudan
Client: Ministry Of Water Resources and Irrigation - Z&A is Sub Consultant to Project Planning & Management (BG) - Libanconsult AGM, Lebanon
Year: 2024 - On Going
Funding: World Bank
Contract Value: 285,773.00 € (~297,000.00USD)
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TECHNICAL CONSULTING SERVICES FOR FEASIBILITY STUDIES, DESIGNS, AND SUPERVISION FOR THE REGIONAL CLIMATE RESILIENCE PROGRAM IN SOUTH SUDAN / SS-MWRI-373355-CS-QCBS

Country: South Sudan
Client: Ministry Of Water Resources and Irrigation - Z&A is Sub Consultant to Project Planning & Management (BG) - Libanconsult AGM, Lebanon
Year: 2024 - On Going
Funding: World Bank
Contract Value: 285,773.00 € (~297,000.00USD)

South Sudan experiences frequent and intense floods and droughts. The country is a global hotspot of flood risk, ranking 7th in the world for share of population exposed to riverine floods. Significant floods in 2019 and 2020 were surpassed by record floods in 2021, which affected between 800,000 to 1.2 million people and displaced more than 300,000 people. Economic damages are estimated to be around US$ 671 million6. The country is also vulnerable to droughts, with severe drought recorded twice since independence (2011, 2015). The consulting services aim to support long-term flood risk management planning and investment in South Sudan, to prepare feasibility assessments and design for key priority flood risk management infrastructure, to prepare bidding documents and to conduct super-vision of project work to be implemented through international contracting practices.

The Consulting Services are divided into two phases. Phase 1 is for rapid assessment, investment planning and detailed feasibility studies, design, and bidding documents of priority interventions in the first years of implementation. Phase 2 is for detailed feasibility studies, preparation of detailed design and bidding documents of additional flood risk management and multipurpose water storage interventions.

Z&A shall provide services as below:
Task 1A Flood Control Structures in Bor South and Twic East in Jonglei State, includes the following surveys:
• Prepare detailed specifications for the required surveys (Topo, GI, Hydraulics);
• Review and supervise the quality of the surveys;
• Input to the Inception report (if needed);
• Identification of most suitable rehabilitation solution based on technical, economic, social, and environmental considerations;
• Preparation of detailed feasibility study for the identified rehabilitation solution;
• Prepare online workshop presentation for each of the main priority interventions;
• Develop guidelines for flood control infrastructure identified and recommended during the feasibility studies;
• Preparation of Operation and Maintenance (O&M) manuals.
Required outputs:
• Specifications for surveys;
• Feasibility report for interventions in Task 1A;
• Guidelines for flood control infrastructure identified and recommended during the feasibility studies;
• Guidelines for community training and O&M of infrastructure.

Task 1C Kinyeti multipurpose water resources development project
• Review the basic studies (hydrology, topography, geotechnical engineering, seismicity, environmental & social);
• Prepare detailed specifications for the additional surveys (if needed after assessment of the available data);
• Review the provided feasibility studies and update as per the RCRP ToR;
• Investigation of the Dam foundations, availability of construction materials, slope stability of route of access to dam sites, reservoir slope stability and water tightness;
• Prepare online workshop with the updated feasibility studies;
• Develop dam safety guidelines;
• Prepare final design (including drawings, technical specifications, BoQ, Cost estimations) and bidding documents for the implementation of Kinyeti Dam.
• Prepare dam safety plans, Construction Supervision & Quality Assurance Plan, Instrumentation Plan
Required outputs:
• Specifications for additional surveys;
• Updated feasibility report of Kinyeti Multipurpose Dam with integrated flood mitigation solution;
• Final designs (including drawings, technical specifications, BoQ, Cost estimations);
• Dam safety plan;
• Construction Supervision & Quality Assurance Plan;
• Instrumentation Plan;
• Bidding documents

CONSULTING SERVICES FOR FEASIBILITY STUDIES AND DETAILED DESIGN OF BENUE RIVER BASIN WATER RESOURCES DEVELOPMENT AND MANAGEMENT PROGRAMME FOR FORMULATION OF TRIMING II

Country: Nigeria
Client: FEDERAL MINISTRY OF WATER RESOURCES
Year: 2022 - 2025
Funding: World Bank
Contract Value: 1,889,304.00 € (~2,051,117.00 USD)
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CONSULTING SERVICES FOR FEASIBILITY STUDIES AND DETAILED DESIGN OF BENUE RIVER BASIN WATER RESOURCES DEVELOPMENT AND MANAGEMENT PROGRAMME FOR FORMULATION OF TRIMING II

Country: Nigeria
Client: FEDERAL MINISTRY OF WATER RESOURCES
Year: 2022 - 2025
Funding: World Bank
Contract Value: 1,889,304.00 € (~2,051,117.00 USD)

River Benue is an international river flowing into Nigeria, originating from the highlands of northern Cameroon. The river runs for about 900 km from the border to the confluence with River Niger at Lokoja, Kogi State. River Benue has two major hydrological water provinces in Nigeria – the Upper Benue and the Lower Benue.The Benue River Basin between the International border with Cameroon and Lokoja is classified as hydrological area III and IV in the Nigerian drainage system classification, covering 98.0 x 103 sq km at the International border of Cameroun and drainage area of 338.2×103 sq km at Lokoja and gross surface water potential of 108.10x109m3/year. The groundwater potential is estimated at 37.9x109m3 /year.

Z&A delivered the Dam Safety Reports for the two main Dams of the assignment. The Kiri Dam, which was of the zoned embankment type, about 1250m long and 20m-high and the Doma Dam.

The Doma dam consisted of two structures:

  1. a 520m long Main Embankment (with maximum height 27m) and,

2.a 312m long Saddle Dam (with maximum height about 18m)

TECHNICAL ADVISOR FOR THE DESIGN AND PREPARATION OF THE CONSTRUCTION PERMIT ISSUE AND THE CONSTRUCTION TENDER PACKAGE FOR THE UPGRADE AND EXTENSION OF THE NATIONAL ARCHAEOLOGICAL MUSEUM OF GREECE

Country: Greece
Client: Ventourakis - Tavaniotis and associates S.A., “BETAPLAN”
Year: 2024
Funding: Private
Contract Value: 20,000.00 € (~23,051.00USD)
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TECHNICAL ADVISOR FOR THE DESIGN AND PREPARATION OF THE CONSTRUCTION PERMIT ISSUE AND THE CONSTRUCTION TENDER PACKAGE FOR THE UPGRADE AND EXTENSION OF THE NATIONAL ARCHAEOLOGICAL MUSEUM OF GREECE

Country: Greece
Client: Ventourakis - Tavaniotis and associates S.A., “BETAPLAN”
Year: 2024
Funding: Private
Contract Value: 20,000.00 € (~23,051.00USD)

The project was part of the review of the Preliminary Study for the diversion of Kyklovoros stream, a sub-project of the Upgrade and expansion of the Hellenic National Archaeological Museum of Greece. Z&A reviewed the hydrological studies and also the hydraulic study of the nearby sewerage network

TECHNICAL CONSULTANT SERVICES FOR THE UPDATE OF THE HYDROLOGICAL AND OPERATIONAL STUDY OF THE IASMOS RESERVOIR

Country: Greece
Client: Eastern Macedonia Thrace Region
Year: 2024
Funding: National – EU Funds
Contract Value: 30,876.00 € (~35,586,00 USD)
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TECHNICAL CONSULTANT SERVICES FOR THE UPDATE OF THE HYDROLOGICAL AND OPERATIONAL STUDY OF THE IASMOS RESERVOIR

Country: Greece
Client: Eastern Macedonia Thrace Region
Year: 2024
Funding: National – EU Funds
Contract Value: 30,876.00 € (~35,586,00 USD)

The purpose of the construction of IASMOS Dam is to serve the irrigation needs of the western region of the prefecture, covering a total area of 200,000 ha. This study concerns the update of the operating balance of the Iasmos reservoir, with the aim of updating the environmental study of the project. According to the 2010 hydrological study, the total area of the basin at Vistonida amounts to 596.1 km2, and the drainage basin at the location of the dam under consideration amounts to 537.7 km2.

Z&A performed the hydrological study update

STUDY FOR THE RESTORATION/CREATION OF AN ECOLOGICAL PARK OF LAKE TELMATON AT THE MINING FACILITIES OF THE OLYMPIADA MINE OF THE KASSANDRA MINES OF THE COMPANY HELLINIKOS CHRYSOS IN THE PREFECTURE OF HALKIDIKI HELLINIKON – NORTH GREECE

Country: Greece
Client: Doxiadis +
Year: 2024 - On Going
Funding: Private Funding
Contract Value: 30,000.00 € (~34,576.00USD)
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STUDY FOR THE RESTORATION/CREATION OF AN ECOLOGICAL PARK OF LAKE TELMATON AT THE MINING FACILITIES OF THE OLYMPIADA MINE OF THE KASSANDRA MINES OF THE COMPANY HELLINIKOS CHRYSOS IN THE PREFECTURE OF HALKIDIKI HELLINIKON – NORTH GREECE

Country: Greece
Client: Doxiadis +
Year: 2024 - On Going
Funding: Private Funding
Contract Value: 30,000.00 € (~34,576.00USD)

The mining activity of the Kassandra Mines takes place in the wider area of NE Halkidiki, within the administrative boundaries of the Municipality of Aristotelis and with the operator being “HELLENIC GOLD SOLE ENTITY S.A. OF GOLD MINES AND INDUSTRY”. The project includes interventions of approximately 4,900 ha extending within a to-tal mining concession of 264,000 ha. The Olympiada Project concerns the development of an existing gold-bearing mine of mixed sulphide minerals, with a mining capacity of 12.38×106 tn of ore, exclusively by underground exploi-tation. Part of the above Project is also the environmental restoration of the old Olympiada mining tailings deposit area (Olympiada Tailings Lake). The area to be restored covers an area of 265 ha. In the context of the environ-mental restoration of Lake Telmaton, Olympiada, an Ecological Meta-Industrial Park will be studied and implement-ed, with the aim of creating terrestrial and wetland ecosystems, both to enhance biodiversity and to attract a new tourism model: naturalism, industrial archaeology and culture.
It proposes the formation of surfaces at a rate of 60% with earthworks (excavations – embankments – leveling), the formation of pedestrian routes (mild intervention) at a rate of 10%, and light architectural structures (estimated 500m2), the creation of a new habitat and the preservation and promotion of industrial fragments as sculptural ele-ments. Emphasis will be given to environmental awareness, sports and play.

The scope of the service consists of:
• Investigation of the creation of wetlands by exploiting surface and/or groundwater.
• Description of the current state of groundwater and surface waters in the tailings lake, including the upstream and downstream sections of the Mavrolakkas River, depending on the requirements.
• Investigation of the passage of a stream within the new Park and provision of hydraulic works to create wet-lands from the surface runoff of the Mavrolakkas River.
• Technical solution for the creation of wetlands in the tailings lake.

CONSULTANCY SERVICES FOR UP‐SCALING THE SHIRE RIVER OPERA-TION DECISION SUPPORT SYSTEM (ODSS) THROUGH ENHANCED HY-DROMET NETWORK SYSTEM IN MALAWI

Country: Malawi
Client: Ministry of Water and Sanitation of Malawi
Year: 2022 - 2024
Funding: World Bank
Contract Value: 782,917.05 USD
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CONSULTANCY SERVICES FOR UP‐SCALING THE SHIRE RIVER OPERA-TION DECISION SUPPORT SYSTEM (ODSS) THROUGH ENHANCED HY-DROMET NETWORK SYSTEM IN MALAWI

Country: Malawi
Client: Ministry of Water and Sanitation of Malawi
Year: 2022 - 2024
Funding: World Bank
Contract Value: 782,917.05 USD

The main objective was to create a connection between the results produced by the Shire River Operation Decision Support System (ODSS) software and the KABOM (Kamuzu Barrage Operation and Management Model) management tool so that the hydrological information produced and data collected by the ODSS can be directly in-gested into KABOM to improve and facilitate decision support. It is specified that in the initial phase of implemen-tation, the tool’s functionalities were kept the same as those of the currently implemented system, thus upgrading the software used and connecting it to the ODSS. Subsequently, the need and possibility of adding new features to the tool were also evaluated. Another improvement resulting from the connection with the ODSS software is the more precise definition of the amount of resource coming from the tributaries, which in this case can be directly calculated by the hydrological model instead of being limited to the choice of low or high parameters.

The provided services covered the fields of:
I. Improving the web dissemination platform for informing the public and stakeholders on flooding;
II. Improving the data collection database system (data sharing);
III. Improving the link between Kamuzu Barrage Operative Management and the ODSS;
IV. Improving the existing flood and flow forecasting system for Lower Shire River sub‐catchment;
V. Improving the system to for predicting flooding extents and depths;
VI. Improving the capabilities at the flood forecasting center including human resources;
VII. Improving the system for public participation, public education and sensitization;
VIII. Improve on the application

CONSULTANCY TO CONDUCT REVIEW OF DETAILED DESIGNS, FEASIBILITY STUDY, DETAILED DESIGN STUDIES AND CONSTRUCTION SUPERVISION OF IRRIGATION SCHEMES IN BLANTYRE, BALAKA, DEDZA, MACHINGA, CHIKWAWA AND THYOLO DISTRICTS

Country: Malawi
Client: Ministry of Water and Sanitation of Malawi
Year: 2022 - 2024
Funding: World Bank
Contract Value: 1,211,600.00 USD
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CONSULTANCY TO CONDUCT REVIEW OF DETAILED DESIGNS, FEASIBILITY STUDY, DETAILED DESIGN STUDIES AND CONSTRUCTION SUPERVISION OF IRRIGATION SCHEMES IN BLANTYRE, BALAKA, DEDZA, MACHINGA, CHIKWAWA AND THYOLO DISTRICTS

Country: Malawi
Client: Ministry of Water and Sanitation of Malawi
Year: 2022 - 2024
Funding: World Bank
Contract Value: 1,211,600.00 USD
The new irrigation schemes that were assessed through this consultancy were separated into two groups.

Group A sites: Kasangadzi, Mazame and Nkawinda

Group B sites: Utale, Kamwaza, Khwisa, Lisungwi, Phandiro, Ndundumale, Nkhawazantha and Ulande.

The objectives of the assignment were:

a)         Review existing studies and reports for the Group A (480 ha) irrigation schemes

b)         To prepare or update feasibility studies and climate resilient detailed engineering designs for the Group A irrigation schemes

c)         Assess the condition of the Group B schemes and prepare assessment reports for each one with BoQ of the needed remedy works.

d)         To prepare detailed bidding documents for the works for both Group A (480ha) and Group B (649 ha) schemes (Total Targeted area 1129 Ha) and finally to supervise the works in the mentioned schemes.

The characteristics of Goup A and Group B are listed below

ID No. Scheme Name District Target Area (ha)

Group A

 1 Nkawinda / Bakasala Blantyre 200
2 Manzame Dedza 130
3 Kasangadzi Mzimba 50
Sub-Total 480
ID No. Scheme Name District

Group B

 1 Kamwaza Machinga 132
2 Khwisa Balaka 78
3 Phandiro Machinga 80
4 Ndundumala Zomba 29
5 Nkhawazantha Zomba 49
6 Lisungwi Ntcheu 106
7 Ulande Neno 75
8 Utale Balaka 100
Sub-Total 649

The provided services cover the fields of:

  • Prepare an Inception Report
  • Prepare a Design Review Report
  • Prepare Detail Design Reports
  • Prepare Tender Documents
  • Supervision of Construction

SELECTION OF CONSULTING SERVICES FOR NON‐REVENUE WATER REDUCTION STRATEGIC PLAN AND IMPLEMENTATION MECHANISMS & BUSINESS PLAN DEVELOPMENT OF HAWASSA, WOLAITA‐ SODO AND ARBA‐MINCH TOWNS WATER SUPPLY AND SEWERAGE AUTHORITY

Country: Ethiopia
Client: SNNP REGIONAL WATER, MINES AND ENERGY DEVELOPMENT BUREAU
Year: 2022 - 2025
Funding: World Bank
Contract Value: 1,380,941.00 € (~1,439,589.00 USD)
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SELECTION OF CONSULTING SERVICES FOR NON‐REVENUE WATER REDUCTION STRATEGIC PLAN AND IMPLEMENTATION MECHANISMS & BUSINESS PLAN DEVELOPMENT OF HAWASSA, WOLAITA‐ SODO AND ARBA‐MINCH TOWNS WATER SUPPLY AND SEWERAGE AUTHORITY

Country: Ethiopia
Client: SNNP REGIONAL WATER, MINES AND ENERGY DEVELOPMENT BUREAU
Year: 2022 - 2025
Funding: World Bank
Contract Value: 1,380,941.00 € (~1,439,589.00 USD)

The Federal Democratic Republic of Ethiopia received financing from the International Development Association (IDA) for the im-plementation of Second Urban Water Supply and Sanitation Project (SUWSSP). The Ministry of Water and Energy applied a por-tion of the proceeds of the fund to SNNP Regional State Water, Mines and Energy Development Bureau. The SNNP Region is in the southern part of Ethiopia, its area covers 112,343 km2 and its population is over 15 million. The capital city is Hawassa. The Project focused on the cities of Hawassa, Wolaita Sodo and Arba Minch and included two main assignments, each with its own specific objectives and scope of services:

  • Develop a Non-Revenue Water (NRW) Reduction Strategic Plan.
  • Develop a Business Plan.
    As the two assignments feed into each other, Z&A executed the two assignments concurrently for each of the three Water Enterprises.
    Main water supply service and operation data for the three cities are given in the below table.

City

Population     (urban and rural)

Number of    Customers

Water Production

Hawassa

492,579

36,159

6,000,000m3/year

Arba Minch

167,025

12,092

2,209,000m3/year

Sodo

169,578

11,781

1,230,000m3/year

The development of a NRW Reduction Strategic Plan for each of the three Water Enterprises involved the following tasks:
• Infrastructure (Network) mapping,
• Customer survey,
• Metering of System Input Volume,
• Assessment of customer metering and meter reading practices,
• Preparation of preliminary IWA Water Balance and NRW assessment,
• Capacity Building – Basic Level,
• Establishing a NRW Management Unit,
• Customer meter testing,
• GIS development and hydraulic modeling,
• Design of pressure zones with bulk flow metering,
• Design of District Metered Areas (DMAs),
• Pressure monitoring,
• Preparation of IWA Water Balance and evaluation of Key Performance Indicators,
• Pipe failure documentation and statistics,
• Capacity Building – Medium Level
• Creation of pressure zones and pressure management,
• Creation of pilot DMAs,
• Active Leakage Control in pilot DMAs,
• Customer meter management,
• Reduction of unauthorized consumption,
• Improvement of billing efficiency,
• Rehabilitation planning,
• Capacity Building – High Level,
• Preparation of Strategic Plan Report.

The development of a Business Plan for each of the three Water Enterprises included:
• Review of any existing Master Plan and/or Strategic Plan,
• Assessment of Water Services Provision,
• Assessment of Sanitation Services Provision,
• Assessment of Management Organization and Institutional Framework,
• Identification and scheduling of priority investments,
• Financial projections for the next 3 to 5 years, including the expected performance improvements,
• Key Performance Indicators and corresponding targets for the next 3 to 5 years,
• Plan for Monitoring and Evaluation (M&E) of results and their dissemination.

CONSULTANCY SERVICE FOR DETAILED DESIGN AND REVIEW OF ESMPS/BMPS FOR CHIBALASHI AND KATEMBULA DAMS

Country: Zambia
Client: The Ministry of Agriculture - Irrigation Development Support Project
Year: 2024 - 2025
Funding: World Bank
Contract Value: 212,217.00 € (~230,000.00USD)
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CONSULTANCY SERVICE FOR DETAILED DESIGN AND REVIEW OF ESMPS/BMPS FOR CHIBALASHI AND KATEMBULA DAMS

Country: Zambia
Client: The Ministry of Agriculture - Irrigation Development Support Project
Year: 2024 - 2025
Funding: World Bank
Contract Value: 212,217.00 € (~230,000.00USD)

Τhe objective of the proposed assignment was to provide detailed designs for construction remediation of the two dams after review of designs dams from UNOPS.  Further the consultant reviewed and modified the ESMP and the BMP submitted by UNOPS to suit the new designs for the two dams.

Name of dam siteHeight Current storage capacity (m3)Summary of Remedial measures identified
Katembula (Construction Date 2016)9 m        2,030,000Raising of dam embankment, Spillways/approach/return channels works (current spillway level maintained), Drainage Works.
Chibalashi(Construction Date 2016)9 m        3,150,000Raising of dam embankment, Spillways/approach/return channels works (current spillway level maintained), Drainage Works.

The services were organized in three parts:

• Review the designs and ensure compliance with the technical specification and design solution of the works implemented by the contractor

• Supervision of construction works and implementation of safeguard measures. • Training Activities for stakeholders such as dam committees and district local staff.

CONSULTANCY SERVICES FOR FEASIBILITY AND DETAILED DESIGN OF MULANJE DAM, MOMBEZI MULTIPURPOSE DAM AND ASSOCIATED STRUCTURES

Country: Malawi
Client: Blantyre Water Board
Year: 2025 - On Going
Funding: World Bank
Contract Value: 1,398,559,00 € (~1,515,750.00USD)
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CONSULTANCY SERVICES FOR FEASIBILITY AND DETAILED DESIGN OF MULANJE DAM, MOMBEZI MULTIPURPOSE DAM AND ASSOCIATED STRUCTURES

Country: Malawi
Client: Blantyre Water Board
Year: 2025 - On Going
Funding: World Bank
Contract Value: 1,398,559,00 € (~1,515,750.00USD)

he main objective of this assignment is to carry out the required designs and investigations for Mombezi and Maku-wa Dam project and Mulanje Dam project, developing also Dam Safety Management Plans
(DSMP) in line with World Bank requirements
As per collected information, BWB is estimated to service 66,822 individual connections, 813 water kiosks (for communal supply), and a further 3,000 commercial, industrial, and institutional connections. The utility manages a reticulation system of about 1407km and 23 reservoirs (of which four clear water tanks) with an estimated capacity of 97,317m3. The management of the system is divided into three zones, Limbe, Kabula, and Soche.
Specific Taks by project under this consultancy
a. Mulanje Dam.

  • Prepare a Feasibility Study (technical, financial and economic) for construction of the Dam
  • Carry out a full Environmental and Social Impact assessment for the construction of the Dam
  • Prepare an optimized preliminary and the conveyance system to Nguludi Treatment Works
  • Review the designs for Nguludi Treatment Works and recommend whether expansions are necessary
    in line with the proposed dam works.
  • Carry out detailed design of the Mulanje dam, the conveyance system to Nguludi Treatment Works
    and Treatment Works if proposed
  • Prepare the Dam safety management plans (DSMP) and Prepare bid documents for all proposed works

b. Mombezi Dam.

The dam was designed to have an active storage capacity of 71.6 Mm3 and a maximum height of 44m in-cluding freeboard. Its construction will lead to flooding around 620 ha of land upstream of the dam. The dam will be a rockfill dam.
The water treatment plant will be located around 1 km downstream of the dam, on the right bank of the river. Its capacity is 57,500 m3/s for the first stage and 57,500 m3/d too for the second stage.
The transmission system was designed to comprise of (i) three (3) pumping stations, (ii) pipelines ranging from 250mm to 900mm for a length of around 100km and (iii) three (3) new reservoirs, of which two of them would be constructed with the city of Blantyre while one would be located at the treatment works.

CHAVRIA IRRIGATION NETWORKS STUDY

Country: Greece
Client: Ministry of Transport and Infrastructure
Year: 2025 - On Going
Funding: National Funding - EU FUNDING
Contract Value: 1,886,000.00 € (~2,120,400.00 USD)
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CHAVRIA IRRIGATION NETWORKS STUDY

Country: Greece
Client: Ministry of Transport and Infrastructure
Year: 2025 - On Going
Funding: National Funding - EU FUNDING
Contract Value: 1,886,000.00 € (~2,120,400.00 USD)

The contract concerns the preparation of the Irrigation Study of a net agricultural area of 24,000 Ha in the Ormylia plain area of Chalkidiki, as well as the related water intake works such as the Transmission pipelines with a total length of approximately 6.0 km, Three (3) tanks of different storage volumes (20,000, 7,000 and 5,000), Six (6) Irrigation Pumping Stations and three boreholes.
Within the framework of the irrigation networks, the drainage system is also being designed, which is discharged into the streams of the area – Twelve (12) streams, including the river Chavria – Catchment areas ranging from 0.50 km2 to 75.0 km2 (area of Chavria 475.3 km2) – Total length of regulated approximately 27 km – Regulating projects within and within residential areas
In summary, the required studies are as follows:
• Agricultural and Feasibility Studies
• Hydraulic Studies in two stages: Stage 1 Preliminary Study and Stage 2 Deatail Design.
• Electromechanical Studies in two stages: Stage 1 Preliminary Study and Stage 2 Detail Design
• Topographical Works and Studies
• Geological Surveys and Studies
• Geotechnical Investigations and Studies
• Static Studies
• Environmental Impact Study
• Preparation of Tender Documents

CONSULTANCY SERVICES FOR THE EXPANSION OF THE SEWERAGE SYSTEM IN THE CURIUM COMPLEX (EPISKOPI, YPSONAS, TRACHONI, ASOMATOS, TSERKEZ TSIFLIK, AKROTIRI, KOLOSSI, ERIMI)

Country: Cyprus
Client: Larnaca District Government Organization
Year: 2024 - On Going
Funding: National Funding - EU FUNDING
Contract Value: 4,500,000.00 € (~5,001,750.00 USD)
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CONSULTANCY SERVICES FOR THE EXPANSION OF THE SEWERAGE SYSTEM IN THE CURIUM COMPLEX (EPISKOPI, YPSONAS, TRACHONI, ASOMATOS, TSERKEZ TSIFLIK, AKROTIRI, KOLOSSI, ERIMI)

Country: Cyprus
Client: Larnaca District Government Organization
Year: 2024 - On Going
Funding: National Funding - EU FUNDING
Contract Value: 4,500,000.00 € (~5,001,750.00 USD)

The total population of the area is approximately 42,000, The Minimum length of network to be constructed is 220 km and the total area within which the sewage network will be constructed is approximately estimated to be 33 km2 .
The scope of work is :
-The Preparation of an optioneering study, carry out a Master Plan for the selected scenario, and carry out a feasibility study and environmental impact assessment study for this scenario.
-Detail Design of the sewage network and preparation of the tender documents
-Preparation of tender documents for a Design Build and Operate contract for the Wastewater Treatment Plant and the Pumping Stations and Construction Supervision

CONTRACT FOR HIRING A CONSULTANCY FIRM FOR REVIEW DESIGN STUDY FOR CYOHOHA HILLSIDE AND MARSHLAND

Country: Rwanda
Client: Rwanda Agriculture and Animal Resources Development Board (RAB) - Commercialization and De Risking for Agricultural Transformation (CDAT) Project
Year: 2024 - On Going
Funding: World Bank
Contract Value: 656,790.00 € (~717,647.00USD)
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CONTRACT FOR HIRING A CONSULTANCY FIRM FOR REVIEW DESIGN STUDY FOR CYOHOHA HILLSIDE AND MARSHLAND

Country: Rwanda
Client: Rwanda Agriculture and Animal Resources Development Board (RAB) - Commercialization and De Risking for Agricultural Transformation (CDAT) Project
Year: 2024 - On Going
Funding: World Bank
Contract Value: 656,790.00 € (~717,647.00USD)

The main objective of this assignment is to undertake the design review and modifications to the existing study of Cyohoha North Hillside & Marshland Irrigation and Drainage Project to irrigate at least 3,000 ha net from the 5,000 ha gross area along the south side of the valley between Akanyaru River and the upstream end of Cyohoha Lake, not exceeding 50m in elevation above the lake. Based on this, prepare the detail design and tender documents for construction works of the modified irrigation system and infrastructures.
The Cyohoha North Irrigation and Drainage Project has a total gross command area of 3,400ha, sub divided in four Blocks, for which feasibility and detail design studies were prepared. The project work is constituted by the key salient features as follows:

  • Each block has 2 pump stations pumping to reservoirs located at an upper and a lower zone.
  • A total of 3,400ha of irrigation systems consisting of 40% sprinkler irrigation (for high-pressure zones) and 60% pipe-flow hydrants (for hose or drip irrigation in low-pressure zones);
  • A long regulating weir structure has been proposed across the Akanyaru River valley floor just downstream of the confluence with Murago Marsh, to increase and control the level of water in the river and provide water in lake Cyohoha

CONSULTANCY SERVICE FOR DESIGN AND SUPERVISION, ELABORATION OF ENVIRONMENTAL AND SOCIAL INSTRUMENTS FOR NAMPULA WATER SUPPLY SYSTEMS – PACKAGE 4

Country: Mozambique
Client: Administração de Infra-estruturas de Água e Saneamento (AIAS, IP)
Year: 2024 - On Going
Funding: World Bank
Contract Value: 551,417.00 € (~731,896.00USD) Lump Sup / 1,592,000.00 USD Time Based
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CONSULTANCY SERVICE FOR DESIGN AND SUPERVISION, ELABORATION OF ENVIRONMENTAL AND SOCIAL INSTRUMENTS FOR NAMPULA WATER SUPPLY SYSTEMS – PACKAGE 4

Country: Mozambique
Client: Administração de Infra-estruturas de Água e Saneamento (AIAS, IP)
Year: 2024 - On Going
Funding: World Bank
Contract Value: 551,417.00 € (~731,896.00USD) Lump Sup / 1,592,000.00 USD Time Based

The assigment concerns the design and supervision of the construction works in the small towns of Ribaué, Mutuali and Mecuburi and rural growth centers of Chiulo – Malema, Niosse – Malema, Muiti – Mecuburi and Namilasse – Murrupula (Mozambique). The consultancy includes: the upgrade and expansion of the water supply systems (including, household connections), abstraction, water treatment plants, reservoirs and reticulations. Concurrently the consultant will also elaborate an environmental and social assessment for each of the above mentioned locations.

RIBÁUÈ: The District of Ribáuè has a population of 256,144 inhabitants

MUTUALI: The Administrative post of Mutuali has a population of 67,362 inhabitants

MECUBURI: The Mecubúri administrative post has a population of 96,297

CHIHULO- MALEMA: The locality of Chihulo has a total population of 18,994 inhabitants
NIOSSE- MALEMA: The administrative post of Malema has a total population of 126,655 inhabitants
MUITE- MECUBURI: The administrative post of Muite has a total population of 40,661 inhabitants
NAMILASSE- MURRUPULA: The administrative post of Chinga has a total population of 9,632 inhabitants

SELECTION OF CONSULTING SERVICES FOR SUPERVISION AND CONTRACT ADMINISTRATION OF ADDIS ABABA CITY WATER DISTRIBUTION SCADA SYSTEM PROJECT

Country: Ethiopia
Client: AAWSA, Water and Sanitation Infrastructure Development Division
Year: 2022 - In progress
Funding: World Bank
Contract Value: 1,007,400.00 € (~1,077,918.00 USD)
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SELECTION OF CONSULTING SERVICES FOR SUPERVISION AND CONTRACT ADMINISTRATION OF ADDIS ABABA CITY WATER DISTRIBUTION SCADA SYSTEM PROJECT

Country: Ethiopia
Client: AAWSA, Water and Sanitation Infrastructure Development Division
Year: 2022 - In progress
Funding: World Bank
Contract Value: 1,007,400.00 € (~1,077,918.00 USD)

The scope of this consultancy service includes all contract administration and supervision activities required during detail design, supply and installation of the centralized SCADA system. Z&A is responsible for managing the contractor’s activities with the required quality and completion of the project on an agreed timeline.
Z&A is responsible for supervision of the following contractor’s activities which are under the scope of work of the SCADA project:

a) Conducting site audit and reparation of revised bill of quantities for each existing SCADA systems.
b) Design review and producing final working documents.
c) Rehabilitation and maintenance of existing Local Control Stations (LCS) and existing SCADA systems.
d) Implementation of a new Central Control Station to be located at AAWSA Head Office
e) Incorporation of the existing SCADA systems of Gafarsa Water Treatment Plant, Lagadadhi Water Treatment Plant, Akaki well fields ( phases I, II, IIIA, IIIB), Lagadadhi Deep wells Phase I & Phase II, Koye Feche Well field into the new SCADA System.
f) Implementation of new SCADA system for SANF Deep Wells and incorporation into the central SCADA system
g) Detailed design, supply, installation and commissioning of the new Local Control Stations for reservoirs and pumping stations which are part of the water distribution network.
h) Incorporation of the new local control stations into the new central SCADA system.
i) Detail design, supply, installation and integrating into central SCADA of the internal network monitoring stations
j) Implementation of SCADA clients at the AAWSA Branch Offices

CONSULTANCY SERVICES FOR THE PREPARATION OF THE NATIONAL WATER RESOURCES DEVELOPMENT PROGRAM (NWRDP) AND ASSESSMENT OF DAM SAFETY PRACTICES IN MOZAMBIQUE

Country: Mozambique
Client: MINISTRY OF PUBLIC WORKS, HOUSING AND WATER RESOURCE
Year: 2024 - On Going
Funding: World Bank
Contract Value: 167,000.00 € (~180,000.00USD)
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CONSULTANCY SERVICES FOR THE PREPARATION OF THE NATIONAL WATER RESOURCES DEVELOPMENT PROGRAM (NWRDP) AND ASSESSMENT OF DAM SAFETY PRACTICES IN MOZAMBIQUE

Country: Mozambique
Client: MINISTRY OF PUBLIC WORKS, HOUSING AND WATER RESOURCE
Year: 2024 - On Going
Funding: World Bank
Contract Value: 167,000.00 € (~180,000.00USD)

The Sub-Consultant (Z&A) is providing the following Consultancy services:

1.         Feasibility Study Phase

Z&A shall prepare the Feasibility design of the Macuje Dam for Nampula and ancillary structures (intake, bottom/mid level outlet, spillway), and some alternatives to be discussed, according to the World Bank Standard. The sub-consultant shall also support the Consultant to redact the investigation plan for engineering surveys to be done before the detailed design. The subconsultant will provide support for the hydrological and flood analysis, sediment transport analysis and preliminary topographic surveys (including the DTM), that remain in charge to the Consultant, as well as the geological surveys and reports.

2.         Detailed Design Phase

Characteristics of the examined dam sites

RN – DescriptionΧ (m)Y (m)Total dam height (m)Dam length (m)
WGS84 UTM Zone 37S
Dam axis 1512762.58345727.033.0715
Dam axis 2513322.88345024.936.0770
Dam axis 3513590.58344568.833.0770

The final feasibility study suggested proposal No2. The Final Dam characteristics are the following: A rockfill dam at the order of 36m in height, is estimated to be approximately 770m long at crest axis. The river invert elevation is set at +407.00masl. The crest width is set at 8.0m, and the embankment slopes are proposed 2.5:1 (width: height) for the upstream face and 2:1 for the downstream face.

CONSTRUCTION SUPERVISION OF THE REMAINING WORKS FOR THE LUSITU, MUSAKASHI SOUTH AND MUSAKASHI NORTH IRRIGATION SCHEMES, INSTALLATION OF COMMUNITY WATER FOR LUSITU & MUSAKASHI SOUTH AND THE PROCUREMENT OF SPARES FOR THE THREE IRRIGATION SCHEMES

Country: Zambia
Client: MINISTRY OF AGRICULTURE
Year: 2024 - 2025
Funding: World Bank
Contract Value: 363,670.00 € (~398,325.00USD)
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CONSTRUCTION SUPERVISION OF THE REMAINING WORKS FOR THE LUSITU, MUSAKASHI SOUTH AND MUSAKASHI NORTH IRRIGATION SCHEMES, INSTALLATION OF COMMUNITY WATER FOR LUSITU & MUSAKASHI SOUTH AND THE PROCUREMENT OF SPARES FOR THE THREE IRRIGATION SCHEMES

Country: Zambia
Client: MINISTRY OF AGRICULTURE
Year: 2024 - 2025
Funding: World Bank
Contract Value: 363,670.00 € (~398,325.00USD)

This Consulting Services for Construction Supervision and Preparation of O&M Plans were for the Lusitu, Musakashi South and North Irrigation Schemes situated in Chirundu and Mufulira Districts, respectively. The services also included the supervision of the water supply installation for the Musakashi South and Lusitu communities as well as supervising the procurement of spares for the three irrigation schemes namely Lusitu, Musakashi South and Mwomboshi
Lusitu Location and size of the command area
The Lusitu Irrigation Scheme site is located on the left bank of the Zambezi River, downstream of Kariba Dam and about 15km south of Chirundu district in Lusaka Province. The size of the existing gross area was approximately 5,000ha while the proposed size of the command area was 530ha.

Musakashi Location and size of the command area
The Musakashi Irrigation Scheme site is located in Musakashi Farming Block in Mufilira District on the Copperbelt. The project area comprised a mix of farmers on a gross area of approximately 725 ha. Water was supplied to the irrigation areas via a system of pumping stations, reservoirs and pipes.

Z&A performed the principal services as the Engineer responsible for the supervision of the works (in accordance with the FIDIC Conditions of Contract). Z&A ensured that the works were carried out in accordance with the approved design and specifications, and that the quality of works meet the standards and specifications re-quired in technical document. That included assessment and monitoring of construction/ installation programs, mate-rials, labor, construction/ installation methods, in compliance with specified construction/ installation methods.