DOLSAR has substantial experience in a wide range of fields through numerous projects. General experience of DOLSAR under its main fields of activity, namely Energy, Water, Transportation, Environment and Buildings can be briefly summarised as follows.
In the field of Energy, DOLSAR has vast experience related to various types of power plants, including hydroelectric, thermal, solar, wind and nuclear as well as switchyards, substations and energy transmission lines. Especially in the field of hydroelectric power plants, with engineering and consultancy services successfully performed for more than two hundred hydropower projects with installed capacities ranging from 1.2 MW to 4,500 MW, DOLSAR represents the leading experience in Turkey. The installed capacities of those projects totals to some 35,000 MW, including the largest hydroelectric power plants in Turkey and in the world such as Diamer Basha (4,500 MW), Dasu (4,320 MW), Atatürk (2,400 MW), Karakaya (1,800 MW), Keban (1,340 MW) and Ilısu (1,200 MW). Approximately 60% of the above-mentioned total installed power capacity of 35,000 MW belongs to the projects in Turkey and 40% belongs to the projects abroad. Considering that Turkey’s estimated total hydroelectric energy potential is 48,000 MW and approximately 30,000 MW of this amount is in operation by the end of 2020, the magnitude of DOLSAR’s experience in this field is evident.
DOLSAR’s experience in this field covers all of the engineering and consultancy services of a project from planning to the commissioning including preparation of master plan and feasibility reports, conceptual/final design, application drawings, technical specifications, bill of quantities, cost estimates, tender documents and loan application reports, assistance to the Clients during contract negotiations as well as performance of construction supervision, permanent equipment installation supervision, factory tests and site tests, preliminary and final acceptances, commissioning, monitoring and rehabilitation services. DOLSAR also provides Lenders’ Technical Advisory services at all stages of projects, as mentioned above, for banks and international financial institutions that contribute to the financing of projects carried out by investors under the Build-Operate-Transfer (BOT), Public-Private-Partnership (PPP) or auto-producer models.
DOLSAR is a member of Turkish National Committee of World Energy Council (WEC) and International Hydropower Association (IHA) and holds certification related to the Provision of Engineering and Consultancy Services for Nuclear Power Plants given by Turkish Atomic Energy Administration.
In the field of Water, DOLSAR has contributed to several projects at various stages related to dams, reservoirs, weirs, water supply and distribution, sewerage and storm water, irrigation and drainage.
DOLSAR has successfully provided engineering and consultancy services for more than two hundred dams, reservoirs and weirs in various types and heights ranging from few meters up to 272 m. These projects include the largest dams in Turkey and in the world from the height point of view such as Diamer Basha (272 m), Yusufeli (270 m), Deriner (249 m), Dasu (242 m), Ermenek (230 m) and from the fill volume point of view such as Atatürk (84.5 million m3). DOLSAR has also contributed to the water supply and distribution projects of the large cities and various towns including Istanbul, Ankara, İzmir, Adana, Gaziantep and some provinces in Azerbaijan and Pakistan and challenging projects such as Cyprus Water Supply Project. DOLSAR’s experience also covers sewerage and storm water projects of several cities and settlements including Istanbul, Eskişehir, Kahramanmaraş and Muğla and various provinces in Azerbaijan and Pakistan. DOLSAR has also contributed to several irrigation projects totalling to an irrigation area of more than 2 million hectares including projects such as the Management, Operation and Maintenance of GAP (Southeastern Anatolia Project) Irrigation Systems Project. DOLSAR represents extensive experience in tunnels for irrigation, energy production and water supply including projects such as the Şanlıurfa Tunnels (total length 52 km, diameter 7.62 m) which is among the longest irrigation tunnels in the world.
In the field of water, DOLSAR also conducts large scale studies related to basin management, as well as water supply, sewerage master plans and rural development plans. DOLSAR’s experience includes studies such as Istanbul Water and Sewerage Master Plan, Ankara Water Supply Master Plan and Feasibility Study, Kızılırmak Basin Master Plan and Akarçay, West Blacksea, Yeşilırmak Basins Management Plans.
DOLSAR is authorised and certified by the State Hydraulic Works of Turkish Republic, Ministry of Agriculture and Forestry to conduct Construction Supervision Services for Water and Hydraulic Structures.
In the field of Transportation, DOLSAR performs engineering and consultancy services for roads, motorways, railways, airports and sea ports and their appurtenant structures including tunnels, viaducts and bridges.
Services provided include preparation of master plan and feasibility reports, conceptual/final design, application drawings, technical specifications, bill of quantities, cost estimates, tender documents, assistance to the Clients during contract negotiations as well as performance of construction supervision, preliminary and final acceptances, commissioning, monitoring and rehabilitation services during operation period. DOLSAR also provides Lenders’ Technical Advisory services at all stages of projects for banks and international financial institutions that contribute to the financing of projects carried out by investors under Public-Private-Partnership (PPP) model.
DOLSAR’s experience in this filed includes projects such as Istanbul Airport (165 mio pass./annum), Gebze-İzmir Motorway (507 km), Northern Marmara Motorway (194 km), Karakoram Motorway (130 km), Havelian-Thakot Motorway (120 km), Milot-Morine Motorway (115 km), Kayaş-Kırıkkale Double Track Railway (80 km) and Silifke-Mut State Highway (78 km). Studies performed in the field of transportation include Derince Port Master Plan and Feasibility Report, Master Plan for Hinterland Railways and Highways Connections of Seaports in Turkey and Master Plan for Fishery Coastal Structures of Turkey.
The total length of roads, highways and railways projects for which engineering and consultancy services have been performed exceeds 2,500 km.
(Selected Projects – Transportation)
In the field of Environment, DOLSAR conducts environmental and social impact assessment and monitoring services and also performs engineering and consultancy services in relation with potable water treatment plants, waste water treatment plants, deep see discharge facilities, waste management, flood and drought management.
DOLSAR is authorised and certified by the Ministry of Environment and Urbanisation to conduct environmental impact assessment studies as well as environmental impact monitoring services and have been performing such services for numerous projects especially in the fields of energy, water supply and transportation. DOLSAR has been providing similar services for international financing institutions, ECA’s and possesses extensive experience related to such studies as well.
DOLSAR’s experience related to potable treatment plants covers several projects with capacities ranging from 42,500 m3/day to 1,050,000 m3/day including Gaziantep (Düzbağ-Kartalkaya) Potable Water Treatment Plant (1,050,000 m3/day), Antalya –Karacaören Potable Water Treatment Plant (700,000 m3/day) and İzmit Potable Water Treatment Plant (480,000 m3/day). Likewise DOLSAR’s experience related to wastewater treatment plants covers numerous projects with capacities ranging from 3.240 m3/day to 202,800 m3/day including Van Wastewater Treatment Plant (202,800 m3/day), Serik (Antalya) Wastewater Treatment Plant (135,000 m3/day) and Gebze (Kocaeli) Wastewater Treatment Plant (120,000 m3/day).
In the field of environment, DOLSAR also conducts large scale studies related to flood and drought management plans. DOLSAR’s experience includes studies such as Marmara Basin Flood Management Plan, Edirne-Ergene Flood Protection Planning Report and Drought Management Plans for Kızılırmak, Konya, Antalya, Burdur Basins.
(Selected Projects – Environment)
In the field of Buildings, DOLSAR’s experience covers the engineering and consultancy services provided for various types of buildings including educational facilities, laboratory buildings, hospitals, mass housing, business and trade centres, embassies, sports facilities, shopping malls and hotels. Experience in this field includes projects such as; Business Centres in Kocaeli, Gölcük and Yalova provinces under “Turkey Infrastructure and Urban Reconstruction Project” (TERRA-1), Educational Facilities, Lodgings and Sports Facilities in 16 provinces within the scope of the Support to Basic Education Project in Turkey, National Food Reference Laboratory in Ankara, Forensic Laboratories in İstanbul, İzmir, Diyarbakır and Adana, Embassy and Ambassador’s Residence of Ethiopia in Ankara, Trade and Residential Complex in Kampala, Uganda and 40 schools in Istanbul.
Services provided include preparation of architectural design, conceptual/final design, application drawings, technical specifications, bill of quantities, cost estimates, tender documents, assistance to the Clients during contract negotiations as well as performance of construction supervision, preliminary and final acceptances and commissioning. DOLSAR also provides Lenders’ Technical Advisory services at all stages of projects for banks and international financial institutions that contribute to the financing of projects carried out by investors under Public-Private-Partnership (PPP) model.