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FEASIBILITY STUDY OF WATER AND WASTEWATER TREATMENT PLANT SLUDGE REUSE

Country: ETHIOPIA ,   Year: 2015 - 2016 ,   Client: Addis Ababa Water & Sewerage Authority (AAWSA) ,   Funding: Ethiopian Government ,   Contract Value: 307,178.00 € (377,829.00 USD) ,   Tags: Sewage and Wastewater

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RFP

This project will help AAWSA to assess the upcoming problem of sludge disposal and to organize the required financial and technical future actions. The assignment focused on a)the assessment of the volume of sludge production at different water and waste water treatment plants in Addis Ababa, b) the preparation of conceptual engineering designs and estimated costs for disposal and reuse of sludge, c) the analysis of the technical and financial and economic feasibility of the proposed project, d) the preparation of a Preliminary study and Tender documents, e) the analysis of Risks and Assumptions Affecting the Execution of the Project, f) the conduct of ESIA on sludge management and reuse and the g) Review of existing designs and studies.




LEGEDADI AND DIRE DAM REHABILITATION SERVICE

Country: ETHIOPIA ,   Year: 2015 - 2015 ,   Client: Addis Ababa Water & Sewerage Authority (AAWSA) ,   Funding: Ethiopian Government ,   Contract Value: 237,735 € (287,746 USD) ,   Tags: Dams & Hydropower

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RFP

The Addis Ababa city is at present supplied with water from three surface water resources, the Legedadi, Dire and Geffersa reservoirs, and ground water sources . The Legedadi dam (1970, height: 44 m) and the Dire dam (1999, height: 41m), have a capacity of 44MCM and 19MCM respectively. The project objectives included a)the conduct of a bathymetric survey of Dire reservoir, the calculation of current storage volume, b) the review of the collected dam instrumentation data and of the dam stability status, c)the review of particular problems related to specific electro-mechanical components installed at Dire and Legedadi dams, the proposal of rehabilitation optionsat detailed final stage and of methods of implementation and time schedule, and the preparation of tender documents for material provision, and d) the review of structural modifications requested at Legedadi dam, the proposal of possible alternatives and methods of implementation and time schedule, the design of the necessary works at a detailed final stage and the provision of tender documents.




DESIGN AND CONSTRUCTION SUPERVISION, CONSULTANTS FOR CITY WATER DISTRIBUTION SCADA SYSTEM

Country: ETHIOPIA ,   Year: 2015 - 2016 ,   Client: Addis Ababa Water & Sewerage Authority (AAWSA) ,   Funding: Ethiopian Government ,   Contract Value: 325,127.00 € (370,645.00USD) ,   Tags: Water Supply & Water Distribution

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RFP

The overall goal of the consultancy service was to provide the means to AAWSA to increase the level of services delivered to its customers by the design and implementation of a centralized SCADA system that would enable the utility operators to remotely monitor the water supply and distribution network operation from the supply sources up to the customers.The services covered a) facility inventory, b) role definition of SCADA, c) study of the water supply distribution system, d) the design of the water supply and distribution SCADA system of the city - the city water supply and distribution SCADA system will incorporate, as one system, all the existing and future developed water sources and distribution system-, e) the preparation of Tender documents, f) the Construction Supervision of first phase and e)a Training workshop for AAWSA staff.




FEASIBILITY STUDY FOR HYDROPOWER PLANTS AT CHANIA RIVER OUTFALL AND THIKA DAM, AND DESIGN AND SUPERVISION OF THE CONSTRUCTION OF HYDROPOWER POWER GENERATION STATION AT CHANIA RIVER OUTFALL.

Country: KENYA ,   Year: 2015 - In progress ,   Client: Athi Water Services Board ,   Funding: International Development Association (IDA) ,   Contract Value: 367,395.70 € (422,505.06USD) ,   Tags: Dams & Hydropower

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RFP

Athi Water Services Board intends to utilize the existing hydropower potential in its existing water facilities and generate electricity either for integration into the grid or direct usage in order to meet the increasing demand for power in Kenya.This project will exploit the residual head at the Chania outfall estimated to be about 50 meters and with an average flow of about 2.5 m³/sec in a run-of-river power generation scheme.Chania outfall is the point at which water from Thika dam together with that abstracted from Kiama and Kimakia Rivers is transmitted to Mwagu intake through a series of tunnels. Mwagu Intake the water is again transmistted through a tunnel and a pipeline to Ng'ethu water production plant for treatment and later transmission to Nairobi City for consumption.
The scope of works will be in two phases as follows:a) Phase 1: Feasibility study for Hydropower Plants at Chania Outfall (3MW) and Thika Dam (1.2MW), and Preparation of Design and Bidding Document for Chania plant, b) Phase 2: Supervision and Coordination of Hydroelectric Power Generation Station at Chania Outfall.




DETAILED FRAMEWORK AND WORKPLAN TO OPERATIONALISE THE SANITATION CONNECTION ACTION PLAN FOR MTENDERE

Country: ZAMBIA ,   Year: 2014 - 2014 ,   Client: MILLENNIUM CHALLENGE ACCOUNT-ZAMBIA LIMITED ,   Funding: MILLENNIUM CHALLENGE ACCOUNT-ZAMBIA LIMITED ,   Contract Value: 154,410.00 USD$ ,   Tags: Sewage and Wastewater

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RFP

This assignment relates to the Kaunda Square Sewershed expansion component, and specifically to the sewer expansion in Mtendere. The component involved the construction of a new sewer reticulation system in Mtendere to which households will be expected to connect. Over 9,000 households were expected to benefit from this intervention. This specific assignment addressed the requirement to “give effect” to the Sanitation Connection Action Plan (SCAP) via the development of a detailed framework and work plan to operationalise it. The project objectives that needed to be implemented involved the provision of cost estimates for the household connections to the sanitation network infrastructure assets and the design and cost estimation for suitable household infrastructure, i.e. water closets (WC). The level of implementation is expected to be over 80% in order for the Sanitation Network to function efficiently. The project's outcome will have significant impact on future endeavors in similar areas in Zambia, as it identifies the problems and risks within the parameters given. The total gravity flowing sewerage network that was examined has a length of approximately 82,000 m.




FEASIBILITY STUDY, PRELIMINARY & FINAL DESIGNS, ENVIRONMENTAL AND SOCIAL IMPACTS ASSESSEMENT FOR THE PROPOSED UPPER NAROK DAM PROJECT IN NAROK COUNTY

Country: KENYA ,   Year: 2015 - In progress ,   Client: Ministry of Water and Irrigation - National Water Conservation & Pipeline Corporation ,   Funding: Government of Kenya ,   Contract Value: 89,172,000 Kshs (= 1,030,000 US$) ,   Tags: Dams & Hydropower

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RFP

The main objective of the project is the need to implement a major water project that will serve Narok Town and its environs beyond year 2020. Upper Narok Dam will be a multipurpose dam project for domestic, livestock, irrigation, flood control, other multiple water uses and planned to supply water by gravity the city of Narok, without pumping as far as possible. Upper Narok Dam will be a15,000,000 m³ reservoir capacity rock fill dam with clay core of 40.00 height. The selected site is located 300 m downstream of the confluence of the Engare Narok and Olokurto Rivers. The site is located 28 km from Narok Town. The demand is expected to rise to 18,610 m³/day by year 2039 for an estimated population of approximately 163,000 people. 50% of the present water demand will be covered by an ongoing project implemented by JICA. The area to be irrigated is approximately 200ha. The dam and the irrigation networks, that cover an area of 200ha, are designed at a detailed design stage.




STUDY OF THE OUTER WATER NETWORK OF HAVRIA DAM IN CHALKIDIKI PERFECTURE AND WATER TREATMENT INSTALLATION

Country: GREECE ,   Year: 2013 - In progress ,   Client: Chalkidiki Prefecture Authority ,   Funding: European Commission / Cohesion Fund ,   Contract Value: 1,103,387.00 € (1,489,572.45 USD) ,   Tags: Water Supply & Water Distribution

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RFP

Chavrias River is one of the major rivers in the area of Chalkidiki, with a total inflow capacity up to 47.2 x 106 m³ per year. After construction, the dam will irrigate over 3,400 hectares and will supply with drinking water 42 cities and villages, with approximately 10.50 hm³/yr. The feasibility, the preliminary, the detailed design and the tender documents will be included. The water supply transmission and distribution networks are consisted of: (a) 125,970 m long HDPE pipework , (b)146,648 m long steel pipework, (c) six (6) water reservoirs of 8,250 m³ each, (d) eleven (11) pumping stations and (e) water treatment plant installations with capacity of 1.88 m³/sec (= 162,432.00 m³/d). The feasibility study of a 500 m hydraulic tunnel and the 400 m water transfer pipe from the dam and the water treatment plant was also included.




CONSULTANTS SERVICES FOR UNDERTAKING FEASIBILITY STUDY FOR SMALL MULTIPURPOSE RESERVIORS AT NORERA AND BORENGA IN THE MARA RIVER BASIN (KENYA AND TANZANIA)

Country: KENYA ,   Year: 2013 - 2014 ,   Client: Nile Basin Initiative ,   Funding: Government of Sweden ,   Contract Value: 485,850.00 € (647,800 US$) ,   Tags: Dams & Hydropower

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RFP

The Mara River's upper tributaries rise from a swamp in the Mau Escarpment of Kenya and discharges into the Musoma Bay in Lake Victoria. The River is about 400 km long, and drains a total basin area of approximately 13,325 km². The population residing in the basin is approximately 1.3 million people. The Mara River Basin is internationally recognized due to Maasai Mara-Serengeti ecosystem. Jointly, these ecosystems were recently declared the seventh new Wonder of the World. The main objective of this Service is the feasibility study for two multipurpose dams that will include the review of all information available, the carry out of topographical, hydrological surveys and geotechnical investigations and the conduct of a preliminary environmental and social impact assessments. The main features of the Zoned earthfill Norera Dam are: Height 10 m, length 130.0 m and Capacity of 0.237 MCM, on the other hand, the main features of the Zoned earthfill Borenga Dam are: Height 22 m, length 575.0 m and Capacity 15.85 MCM.A HPP(3MW) is also designed at the Borenga site.




CONSULTANCY SERVICES FOR DESIGN AND STUDY OF DECENTRALIZED WASTE WATER MANAGEMENT

Country: ETHIOPIA ,   Year: 2013 - 2014 ,   Client: Addis Ababa Water & Sewerage Authority (AAWSA) ,   Funding: Ethiopian Government ,   Contract Value: 267,265.00€ (335,100.00$ USD) ,   Tags: Sewage and Wastewater

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RFP

The main components of this contract were: a) to identify and quantify areas which cannot be connected and served by the city centralized system proposed by the wastewater master plans due to its physical inaccessibility or due to a delayed implementation plan for the centralized system by evaluating the study reports and paying technical visits to the sites b) to propose a technical solution to the identified pocket areas to consider, by categorizing in to different groups to be entertained with its own identified decentralized wastewater management system to be plugged in to the conventional system whenever the system is ready in the future, c) to propose and design decentralized waste water treatment plants for the identified areas that cannot be served by the conventional sewer master plan in the near future due to its topographic situation and lagging wastewater management implementation plan, d) to produce design detailed standard construction drawings, technical specifications, detail design calculations, BoQs and Engineering costs estimate for all proposed wastewater collection and treatment plant including other relevant infrastructures.




PORT LOUIS DRAINAGE STUDY

Country: MAURITIUS ,   Year: 2013 - 2015 ,   Client: National Development Unit ,   Funding: National Funds ,   Contract Value: 138.00 € ,   Tags: Storm Water Networks and Flood prevention

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RFP

The analysis included interconnected rural and urban catchments, covering a total area of 9km2. The hydraulic design process included 1D non-uniform flow modeling of three main watercourses, namely the Signal Mountain cutoff drain, the Pouce stream, the Ruisseau des Creoles stream and their feeding drains, corresponding to a total length of 6.3km, including the evaluation of the hydraulic performance of five supercritical flow junctions, sixteen bridges and two covered sections, of around 0.8km. Moreover, it included the proposal of appropriate engineering works to alleviate flooding problems at Place d' Armes and the investigation of potential flood peak attenuation measures at the upstream (rural and semi-urban) parts of the catchments. Among the proposed solutions was the reconstruction of insufficient bridges and culverts, the increase of the hydraulic capacity of the streams, the construction of a flood detention pond and the design of new drainage works in specific areas.





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