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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Modifications – completions of existing and new final designs for storm networks inside kifissos river drainage basin

Country: Greece
Client: -
Year: 2002 - 2009
Funding: -
Contract Value: -
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Modifications – completions of existing and new final designs for storm networks inside kifissos river drainage basin

Country: Greece
Client: -
Year: 2002 - 2009
Funding: -
Contract Value: -

The project involved the detailed design studies for the upgrading and rehabilitation of storm water networks within the Kifissos River Drainage Basin covering a large part of the city of Athens. The following studies are the ones completed through the contract by Z&A: Detailed Design for Completion of the Existing Main Storm Network Pipe at Moschato, Kalithea and Nea Smyrni Areas on Eleftherias Street, Detailed Design for Discarding of Flood Projects in the General West Attica Hospital “Attikon”,Detailed Design for the Arrangement of Chaidari stream between the avenues Kavalas and Athinon, Peristeri Municipality, Detailed Design for the Main Storm Network Pipes of the Old Settlement in Acharnes Municipality.
The project involved the detailed design studies for the upgrading and rehabilitation of storm water networks within the Kifissos River Drainage Basin.The following studies are the ones completed through the contract by Z&A: Main Storm Network Pipe at Moschato, Kalithea and Nea Smyrni Areas on Eleftherias Street, Discarding of Flood Projects in the General West Attica Hospital “Attikon”, Realigment of Chaidari stream, Peristeri Municipality, Main Storm Network Pipes of Acharnes Municipality.

Final design of road drainage of p.a.th.E. Motorway during competion of construction at section ag. Theodoroi – almyros

Country: Greece
Client: -
Year: 1996 - 2002
Funding: -
Contract Value: -
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Final design of road drainage of p.a.th.E. Motorway during competion of construction at section ag. Theodoroi – almyros

Country: Greece
Client: -
Year: 1996 - 2002
Funding: -
Contract Value: -

This study concerned the re-evaluation of the detailed design study of the water drainage system at the part of the national motorway from Ag. Tehodoroi junction to Almiros junction. Z&A carried out all the final hydraulic study of water drainage system for the construction of Patra – Athens – Thessalonica – Evzonoi motorway at Ag. Theodoroi – Almyros section, including the interchanges. The need of Final Hydraulic Study resulted from the revision of Final Road Study during construction and the changes that occurred in the layout and hypsometric mapping of the motorway and the service roads. The hydraulic design included the following: (a) water drainage system of the motorway and the service roads (b) drainage system to prevent flooding from upstream catchment areas along with the design of the necessary hydraulic structures (ditches, culverts, etc).
This study concerned the re-evaluation of the detailed design study of the water drainage system at the part of the national motorway from Ag. Tehodoroi junction to Almiros junction. The hydraulic design included the following: (a) water drainage system of the motorway and the service roads (b) drainage system to prevent flooding from upstream catchment areas along with the design of the necessary hydraulic structures (ditches, culverts, etc).

T.i.l.de. (tools for integrated leakage detection)

Country: Cyprus
Client: -
Year: 2003 - 2004
Funding: -
Contract Value: -
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T.i.l.de. (tools for integrated leakage detection)

Country: Cyprus
Client: -
Year: 2003 - 2004
Funding: -
Contract Value: -

The project focused on the problems of leakage and water quality in public water supply networks. TILDE project’s primary target was to optimize management of water distribution systems focusing on leakage. The leakage control process combines the tasks of monitoring, detection, location and repair. Within leakage management it was essential to be able to accurately estimate leakage levels, have good management and monitoring tools, detect location and repair leaks. The ultimate deliverable of TILDE project was a decision support tool (DST) to improve the overall management and operation of water distribution systems and data management tool (DMS) to support water utilities in managing different data in order to establish a state of art leakage strategy. The SCADA system, already installed an operative with in the city’s network, was used to collect and evaluate data from the pilot areas. The TILDE DST and DMS tools developments were connected to the SCADA system.
The project focused on the problems of leakage and water quality in public water supply networks. TILDE project’s primary target was to optimize management of water distribution systems focusing on leakage. The leakage control process combines the tasks of monitoring, detection, location and repair. Within leakage management it was essential to be able to accurately estimate leakage levels, have good management and monitoring tools, detect location and repair leaks.

Detailed design for the drainage of egnatia’s motorway vertical axis siatista – kristallopigi, macedonia, north greece

Country: Greece
Client: -
Year: 2003 - 2004
Funding: -
Contract Value: -
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Detailed design for the drainage of egnatia’s motorway vertical axis siatista – kristallopigi, macedonia, north greece

Country: Greece
Client: -
Year: 2003 - 2004
Funding: -
Contract Value: -

The vertical axis Siatista – Ieropigi / Krystallopigi is part of the Trans-European Transport Network. It links Pogradec – Cafasan – Durres in the south of Albania and it is part of Pan-European Corridor VIII. It is being constructed as a dual carriageway with two traffic lanes and a hard shoulder per direction. The contract objective was the hydraulic design of the Koromilia – Ieropigi part with a length of 21 km. It involved the road surface drainage system and the flooding protection system from upstream catchment areas. Fourty three (43) culverts were designed for this last purpose.
The contract objective was the hydraulic design of the Koromilia – Ieropigi part with a length of 21 km. It involved the road surface drainage system and the flooding protection system from upstream catchment areas. Fourty three (43) culverts were designed for this last purpose.

Detailed design for the drainage of arachthos bridge, egnatia motorway, ipiros prefecture, west greece

Country: Greece
Client: -
Year: 2001 - 2004
Funding: -
Contract Value: -
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Detailed design for the drainage of arachthos bridge, egnatia motorway, ipiros prefecture, west greece

Country: Greece
Client: -
Year: 2001 - 2004
Funding: -
Contract Value: -

Arachthos Bridge is the biggest bridge of Egnatia Motorway and one of the biggest in Europe. The scope of the study was the detailed design of the water drainage system of Arachthos Bridge, the flood protection system from upstream catchments along with the design of the necessary hydraulic structures (ditches, culverts, etc). The Arachthos Bridge has the following technical characteristics: Length of left and right carriageway: 1036 m, Number of spans:8, Maximum span length: 142 m, Maximum pier height: 30 m
Arachthos Bridge of Egnatia Motorway is one of the biggest in Europe. The scope of the study was the detailed design of the water drainage system of Arachthos Bridge, the flood protection system from upstream catchments along with the design of the necessary hydraulic structures (ditches, culverts, etc).

Modifications – completions of sewerage networks in the athens greater area (contract m-153)

Country: Greece
Client: -
Year: 2001 - 2006
Funding: -
Contract Value: -
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Modifications – completions of sewerage networks in the athens greater area (contract m-153)

Country: Greece
Client: -
Year: 2001 - 2006
Funding: -
Contract Value: -

The project involved the detail design studies for the upgrading and rehabilitation of sewerage networks in the greater Athens area. It also included the tender phase documentation for sewerage networks.The following studies were completed through the contract: Detailed design of the sewerage network in Marousi Municipality area, Detailed design of the sewerage network in Neo Hrakleio Municipality area, Detailed design of the sewerage network in Agios Dimitrios Municipality area.
The project involved the detail design for the upgrading and rehabilitation of sewerage networks in the greater Athens area.The following studies were completed through the contract: Detailed design of the sewerage network in Marousi Municipality area, Detailed design of the sewerage network in Neo Hrakleio Municipality area, Detailed design of the sewerage network in Agios Dimitrios Municipality area.

Irrigation of p.a.th.E. Motorway at section from almyros to evagelismos villages, thessaly prefecture, central greece

Country: Greece
Client: -
Year: 2001 - 2003
Funding: -
Contract Value: -
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Irrigation of p.a.th.E. Motorway at section from almyros to evagelismos villages, thessaly prefecture, central greece

Country: Greece
Client: -
Year: 2001 - 2003
Funding: -
Contract Value: -

The study concerned the detailed design of the irrigation system across the national motorway “Patra – Athens – Thessaloniki – Evzonon” in Almyros – Evagelismos section, that included the design of reservoirs and pumping stations, water resources management of drills and springs and the design of the irrigation water supply network and distribution. The total length of the under study section of the highway was about 90 km. Six (6) pumping stations with the nessecary wells and tanks were designed. A full scada system was designed for the automatic control of the irrigation network.
The study concerned the detailed design of the irrigation system across the national motorway “Patra – Athens – Thessaloniki – Evzonon” in Almyros – Evagelismos section, that included the design of reservoirs and pumping stations, water resources management of drills and springs and the design of the irrigation water supply network and distribution. The total length of the under study section of the highway was about 90 km.

Completion of hydraulic studies in the new double high speed railway line between towns kiato and patra, peloponnese, greece (i.d. 219)

Country: Greece
Client: -
Year: 2001 - 2004
Funding: -
Contract Value: -
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Completion of hydraulic studies in the new double high speed railway line between towns kiato and patra, peloponnese, greece (i.d. 219)

Country: Greece
Client: -
Year: 2001 - 2004
Funding: -
Contract Value: -

The preliminary and detailed design of the water drainage system of the railway line from Athens to Patra and especially the part from STA 40+000 to STA 75+000, along with the service road drainage system, the flood protection system from surrounding catchment areas with the necessary hydraulic structures (ditches, culverts, etc). The contract also involved the restoration of the existing irrigation networks.
The preliminary and detailed design of a water drainage system of the railway line from Athens to Patra and especially the part from STA 40+000 to STA 75+000, along with the service road drainage system, the flood protection system from surrounding catchment areas with all the necessary hydraulic structures (ditches, culverts, etc) and the restoration of the existing irrigation networks.

Rehabilitation & modernization of springler irrigation networks in pinios and alfios rivers, prefecture of hleia, peloponesse, south greece

Country: Greece
Client: -
Year: 2000 - 2002
Funding: -
Contract Value: -
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Rehabilitation & modernization of springler irrigation networks in pinios and alfios rivers, prefecture of hleia, peloponesse, south greece

Country: Greece
Client: -
Year: 2000 - 2002
Funding: -
Contract Value: -

The contract objective was the rehabilitation of five (5) irrigation networks of Pineios and Alfios rivers area (approximately 6,000.00 hectares), restructuring the irrigation supply networks, replacing and extending the distribution network along with the rehabilitation of the electrical engineering installations,the development of a scada system for the pumping stations and the environmental studies. For the needs of the design, a sophisticated hydraulic software was developed in house to implement the “Labye” method in an existing network and propose the most cost effective solution for the network rehabilitation. The project was implemented and the Consultant supported the Client during the construction.
The contract objective was the rehabilitation of five (5) irrigation networks of Pineios and Alfios rivers area (approximately 6,000 ha), restructuring the irrigation supply networks, replacing and extending the distribution network along with the rehabilitation of the electrical engineering installations,the development of a scada system for the pumping stations and the environmental studies.

Provision, installation and development of remote system management station for leakage detection of internal water supply network of kozani

Country: Greece
Client: -
Year: 2000 - 2001
Funding: -
Contract Value: -
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Provision, installation and development of remote system management station for leakage detection of internal water supply network of kozani

Country: Greece
Client: -
Year: 2000 - 2001
Funding: -
Contract Value: -

Kozani is a city in Northern Greece with a population of 80.000 people. The project started with the development of a full GIS System of the entire network. The study included a description of the external and internal network system of the city and studied the method of identifying leaks from the existing data with the Service. A hydraulic network simulation model was developed, using the software EPANET2. The area was separated into 22 pressure zones and flow and pressure meters were installed. Field measurements were executed for the calibration of the model. A full telemetry and SCADA system was installed. With the use of the model and the measurements the most critical zones were defined. Site leak detection followed and covered about 30% of the total area. Training of the local staff of the client was done during the campaign. The GIS system and the hydraulic model were both connected with the SCADA system and all the information were transferred on real time basis to the Water Supply Authority’s headquarters.
Kozani is a city in Northern Greece with a population of 80.000 people. The project’s objective was the final study of Kozani’s water supply system including GIS modelling, installation of flow and pressure meters along with the SCADA system, field measurements, design of a replacement program for old valves and pipes, cost estimation, design of pressure management of the network, 24 hrs network monitoring, design of a new billing system and training of the local staff.

Structural study and detailed design of sma – smik building in dekeleia, attiki prefecture

Country: Greece
Client: -
Year: 2000 - 2002
Funding: -
Contract Value: -
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Structural study and detailed design of sma – smik building in dekeleia, attiki prefecture

Country: Greece
Client: -
Year: 2000 - 2002
Funding: -
Contract Value: -

The preliminary and detailed design for the buildings of the headquarters and the school of the Greek Airforce Academy was the scope of the contract. The study included also the design of the Academy Museum and other support buildings. Total area of the buildings studied: 3,450 m².
The preliminary and detailed design for the buildings of the headquarters and the school of the Greek Airforce Academy was the scope of the contract. The study included also the design of the Academy Museum and other support buildings. Total area of the buildings studied: 3,450 m².

Water supply system and drainage system in osmaa village, aetos karystias area, evia island

Country: Greece
Client: -
Year: 2002 - 2003
Funding: -
Contract Value: -
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Water supply system and drainage system in osmaa village, aetos karystias area, evia island

Country: Greece
Client: -
Year: 2002 - 2003
Funding: -
Contract Value: -

The OSMAA area is approximately 1,000 ha. A detailed design of the water supply and water distribution network was part of the contract scope. A system of tanks was proposed and the network was separated into different zones to give flexibility to the system and achieve better maintenance. Software models were used for the hydraulic design. The steep slopes in the area created severe problems to the pipes during extreme rain events, common in the area. A basic storm water system was designed for the flood protection of the area.
The OSMAA area is approximately 1,000 ha. A detailed design of the water supply and water distribution network was part of the contract scope. A system of tanks was proposed and the network was separated into different zones to give flexibility to the system and achieve better maintenance. The steep slopes in the area created severe problems to the pipes during extreme rain events, common in the area. A basic storm water system was designed for the flood protection of the area.

Design of a system of solid waste management in west lesvos and water supply-sewerage and wastewater treatment in eresos – antissa municipality

Country: Greece
Client: -
Year: 1999 - 2006
Funding: -
Contract Value: -
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Design of a system of solid waste management in west lesvos and water supply-sewerage and wastewater treatment in eresos – antissa municipality

Country: Greece
Client: -
Year: 1999 - 2006
Funding: -
Contract Value: -

Eressos – Antissa Municipality is located on Lesvos island, North Aegean Sea. The project involved: – Feasibility study of a solid waste management system for the total area of west Lesvos island. – Feasibility, preliminary and detailed design studies of water supply and distribution network of eleven (11) villages within the Eressos – Antissa municipality. Water supply transmission and distribution network was designed as HDPE (3rd generation) network of approximate 64,230 m water pipes DN500. – Feasibility, preliminary and detailed design studies of sewerage network of eleven (11) villages within the Eressos – Antissa municipality. Sewerage network was designed as HDPE (3rd generation) network of approximate 35,375 m pipes DN110 – DN250. – Preliminary studies of six (6) wastewater treatment plants (WWTP) with their disposal pipelines. The WWTP projects were designed to serve approximate 8,600 PE.
Eressos – Antissa Municipality is located on Lesvos island, North Aegean Sea. The project involved: Feasibility study of a solid waste management system for the total area of west Lesvos island, Feasibility, preliminary and detailed design studies of water supply, water distribution network and waste water network of eleven (11) villages within the Eressos – Antissa municipality and preliminary studies of six (6) wastewater treatment plants (WWTP). The population served is approx. 8,600 PE.

Preliminary studies for the construction of two (2) small hydroelectric plants at kirfi and elikona mountains

Country: Greece
Client: -
Year: 1999 - 2000
Funding: -
Contract Value: -
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Preliminary studies for the construction of two (2) small hydroelectric plants at kirfi and elikona mountains

Country: Greece
Client: -
Year: 1999 - 2000
Funding: -
Contract Value: -

The scope of the project was the study for the tender phase of two small hydroelectric power stations on the Mornos channel, which supplies water to the greater Athens area. The energy produced is almost 800 KWh in each site and the locations of the small hydroelectric stations were proposed on the energy downfall parts of the channel. Both projects were constructed in the Mornos aqueduct near energy dispatch channel, with the necessary modifications of existing installations to avoid active interventions in the environment but also problems in the operation of the aqueduct. The design flow was Q = 14 m3/s in each site and drop 12,2 m in Kirfi HPP and 10,0 m in Elikonas HPP. The energy production was 1.4 MW and 1.17 MW, approximately.
The scope of the project was the study for the tender phase of two small hydroelectric power stations on the Mornos channel, which supplies water to the greater Athens area. The design flow was Q = 14 m3/s in each site and drop 12,2 m in Kirfi HPP and 10,0 m in Elikonas HPP. The energy production was 1.4 MW and 1.17 MW, approximately.

Water supply of salonica from aliakmonas river, phase a: design, construction and operation of water treatment plant

Country: Greece
Client: -
Year: 1999 - 2006
Funding: -
Contract Value: -
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Water supply of salonica from aliakmonas river, phase a: design, construction and operation of water treatment plant

Country: Greece
Client: -
Year: 1999 - 2006
Funding: -
Contract Value: -

The Water Treatment Plant of Salonika receives water from Aliakmon River and treats it to potable for the supply of the urban group of Salonica town. The plant is located at Sindos area, 11 km west of Salonica. The Plant has a treatment capacity of 150.000 m³/day at present stage, with provision up to 600.000 m³/day at complete development. The treatment achieves removal of solids, asbestos, pesticides and organic load. At present stage, the Plant supplies water to 1,100,000 inhabitants of the city.The dams constructed along Aliakmon River for irrigation and energy production, ensure a high degree of flow regulation. The water is diverted to an open channel, connecting Aliakmon with Axios River, from where it is siphoned under the river to Sindos Pumping Station with an 8 km pipe. It is then pumped to the plant (Tank D2) by a 5 km discharge pipe, where it enters through a DN 1700 steel pipe, equipped with a regulating valve and a flow-meter for flow regulation.
The Water Treatment Plant of Salonika, located at Sindos area, 11 km west of Salonica, receives water from Aliakmon River and treats it to potable for the supply of the urban group of Salonica town. The treatment capacity is 150.000 m³/day, with provision up to 600.000 m³/day at complete development to supply water to 1,100,000 inhabitants of the city. The water is diverted to the WWTP form Aliakmon and Axios River.

Master plan of salonica sewerage network

Country: Greece
Client: -
Year: 1999 - 2002
Funding: -
Contract Value: -
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Master plan of salonica sewerage network

Country: Greece
Client: -
Year: 1999 - 2002
Funding: -
Contract Value: -

Salonica is the second largest city in Greece with a population of over 1,100,000 people. The sewer system is mainly combined. The Waste Water Treatment Plant has started operating with full capacity in September 2000. The main collector sewer with a total length of 18 Km was constructed 10 years ago. The main objectives of the Master plan included the assessment of the future needs of the fast growing city and selection of optimum measures of protection of the coastal zone, mainly through reduction of CSO (Combined Sewer Overflows) and some reconfiguration of coastline sewer – pumping station arrangements. Also, improvements of inflow balancing at the main WWTP were studied (alternative configurations of retention tanks and pumps) and a filter arrangement for processing of stored storm water was designed. A study for the management of sludge produced at the Salonica WWTP was carried out.
The main objectives of the Master plan included the assessment of the future needs of the fast growing city and selection of optimum measures of protection of the coastal zone, mainly through reduction of CSO (Combined Sewer Overflows) and some reconfiguration of coastline sewer – pumping station arrangements. Also, improvements of inflow balancing at the main WWTP were studied (alternative configurations of retention tanks and pumps) as well as the management of the sludge produced.

Detailed hydraulic design of komotini by-pass and entrance junction (sector 15.1.1) into egnatia motorway, komotini prefecture, north greece

Country: Greece
Client: -
Year: 1999 - 2000
Funding: -
Contract Value: -
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Detailed hydraulic design of komotini by-pass and entrance junction (sector 15.1.1) into egnatia motorway, komotini prefecture, north greece

Country: Greece
Client: -
Year: 1999 - 2000
Funding: -
Contract Value: -

It concerned the detailed design study of a sewerage & drainage network across the 15.1.1 section of the Egnatia motorway (3.2 km long).The study involved the road drainage system, the flood protection system from surrounding catchment areas with all the necessary hydraulic structures (ditches, culverts, etc).
It concerned the detailed design study of a sewerage & drainage network across the 15.1.1 section of the Egnatia motorway (3.2 km long).The study involved the road drainage system, the flood protection system from surrounding catchment areas with all the necessary hydraulic structures (ditches, culverts, etc).

Rehabilitation of irrigation networks of lysimachia and trichonida lakes (zones 5, 6 and 6a), prefecture of aitoloakarnania, west greece

Country: Greece
Client: -
Year: 1998 - 2002
Funding: -
Contract Value: -
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Rehabilitation of irrigation networks of lysimachia and trichonida lakes (zones 5, 6 and 6a), prefecture of aitoloakarnania, west greece

Country: Greece
Client: -
Year: 1998 - 2002
Funding: -
Contract Value: -

The project concerned the detailed design of a new distribution network with pressure pipes to replace the old network of open channels. It also involved the installation of six (6) new pumping stations, the rehabilitation of the existing irrigation supply network, the road network and the environmental studies. Irrigated area: 3.720 ha. The existing irrigation network mainly due to the lack of maintenance was abandoned. The scope of the design was a new pressurized distribution network of the 4 zones. Sophisticated hydraulic models were used in the design, like “Labye” for the network design and “Trans” for water hummer phenomena.
The project concerned the detailed design of a new distribution network with pressure pipes to replace the old network of open channels. It also involved the installation of six (6) new pumping stations, the rehabilitation of the existing irrigation supply network, the road network and the environmental studies. Irrigated area: 3.720 ha.

Modifications – completions of sewerage and storm networks outside the kifissos river drainage basin

Country: Greece
Client: -
Year: 1997 - 2003
Funding: -
Contract Value: -
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Modifications – completions of sewerage and storm networks outside the kifissos river drainage basin

Country: Greece
Client: -
Year: 1997 - 2003
Funding: -
Contract Value: -

The project involved preliminary and detailed design studies for the upgrading and rehabilitation of sewerage and drainage networks outside the Kifissos River Drainage Basin, in the city of Athens which corresponds to about 1.2 million inhabitants.The following studies were completed through the contract by Z&A: – Detailed culvert design in Sarantapotamos stream. – Detailed design of Pikrodafni stream training works in Athens. – Detailed design of the sanitary sewerage network of Gargitos area in Gerakas Municipality. – Detailed design of Pallini stream training works.
The project involved the detailed design studies for the upgrading and rehabilitation of storm water networks within the Kifissos River Drainage Basin.The following studies are the ones completed through the contract by Z&A: Main Storm Network Pipe at Moschato, Kalithea and Nea Smyrni Areas on Eleftherias Street, Discarding of Flood Projects in the General West Attica Hospital “Attikon”, Realigment of Chaidari stream, Peristeri Municipality, Main Storm Network Pipes of Acharnes Municipality.

Final study and detailed design of patra – athens – salonica motorway, part of broad by-pass in patra (k4 – k5 junctions), peloponnise, south greece

Country: Greece
Client: -
Year: 1997 - 1999
Funding: -
Contract Value: -
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Final study and detailed design of patra – athens – salonica motorway, part of broad by-pass in patra (k4 – k5 junctions), peloponnise, south greece

Country: Greece
Client: -
Year: 1997 - 1999
Funding: -
Contract Value: -

The project concerned the detailed design study of a sewerage and drainage network across the K4 – K5 junctions part of the Patras bypass motorway. Due to difficult area morphology, the design of special hydraulic structures was needed to transfer safely downstream, the water from the upstream catchment areas. The road surface drainage system was also designed. Special care was given in the areas of proposed bridges and the drainage on their surface. Study’s objectives were: Review of and comment on all existing studies, developing a GIS system for the road network, developing a detailed hydraulic model, simulation of different scenarios, final design of canals and channels, storm water protection design, Final drawings and detailed hydraulic analysis and calculations.
The project concerned the detailed design study of a sewerage and drainage network across the K4 – K5 junctions part of the Patras bypass motorway. Due to the morphology, the design of special hydraulic structures was needed. The road surface drainage system was also designed. Special care was given in the areas of proposed bridges.