Consulting Engineers

Ethiopia

Legedadi and dire dam rehabilitation service

Country: Ethiopia
Client: Addis Ababa Water & Sewerage Authority (AAWSA)
Year: 2015 - 2015
Funding: Ethiopian Government
Contract Value: 237,735 € (287,746 USD)
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Legedadi and dire dam rehabilitation service

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

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
Client: Addis Ababa Water & Sewerage Authority (AAWSA)
Year: 2015 - 2016
Funding: Ethiopian Government
Contract Value: 325,127.00 € (370,645.00USD)
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Design and construction supervision, consultants for city water distribution scada system

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

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.

Consultancy services for design and study of decentralized waste water management

Country: Ethiopia
Client: Addis Ababa Water & Sewerage Authority (AAWSA)
Year: 2013 - 2014
Funding: Ethiopian Government
Contract Value: 267,265.00€ (335,100.00$ USD)
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Consultancy services for design and study of decentralized waste water management

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

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.

Ethiopia irrigation and drainageproject feasibility study for an output based aid scheme

Country: Ethiopia
Client: World Bank
Year: 2013 - 2014
Funding: World Bank
Contract Value: 142.626,47 (188,266.94 US$)
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Ethiopia irrigation and drainageproject feasibility study for an output based aid scheme

Country: Ethiopia
Client: World Bank
Year: 2013 - 2014
Funding: World Bank
Contract Value: 142.626,47 (188,266.94 US$)

OBA (Output-Based Aid) is a results-based financing mechanism that is increasingly being used to deliver basic infrastructure and social services to the poor. The general objective of the Feasibility Study was to design an OBA Scheme to support the construction of field channels and land improvements allowing the delivery of satisfactory irrigation services to the 16,000 smallholder farmers as beneficiaries of the Megech-Seraba and Ribb I&D Schemes resulting in higher returns to investments, higher incomes for the farmers and improved protection of the environment. The area to be irrigated is 17,340 ha.

Consultancy services for nrw reduction, hydraulic modelling and gis development

Country: Ethiopia
Client: Addis Ababa Water & Sewerage Authority (AAWSA)
Year: 2011 - 2014
Funding: French Development Agency
Contract Value: 1,079,937.00€ (~1,133,934.38 US$)
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Consultancy services for nrw reduction, hydraulic modelling and gis development

Country: Ethiopia
Client: Addis Ababa Water & Sewerage Authority (AAWSA)
Year: 2011 - 2014
Funding: French Development Agency
Contract Value: 1,079,937.00€ (~1,133,934.38 US$)

The scope of this project was the development of a coherent framework of principles and practices, established in international practice, for reducing AAWSA overall Non Revenue Water (NRW) from a current level of about 36% to 40% to a level of 20% by the year 2020. Addis Ababa and its surrounding areas had population estimated to about 3.5 million inhabitants. A significant aspect of this project within the overall scope was also the Capacity Building of AAWSA personnel. In this sense, the project also aimed to provide to all AAWSA organizational levels (NRW Task Force, Development, GIS, Operation and Maintenance and Accounting Departments) the means and the ability to continuously evaluate and implement future schemes of cost effective NRW management.Ten pilot District Metered Areas each including approximately 800-1200 customers were proposed. Zero pressure tests were performed to test DMA watertightness and the Active Leakage Control was carried out using listening sticks, leak noise correlators and ground microphones. DMA Minimum Night Flow analysis was carried out using available field data. A program of individual consumer demand monitoring of sampled customers was implemented for use in the Minimum Night Flow Analysis.

Water supply study and design, awareness creation and catchment rehabilitation for geffersa, legedadi and dire catchment areas in ethiopia

Country: Ethiopia
Client: Addis Ababa Water & Sewerage Authority (AAWSA)
Year: 2011 - 2012
Funding: World Bank
Contract Value: 1,017,563 (~1,404,238 US$)
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Water supply study and design, awareness creation and catchment rehabilitation for geffersa, legedadi and dire catchment areas in ethiopia

Country: Ethiopia
Client: Addis Ababa Water & Sewerage Authority (AAWSA)
Year: 2011 - 2012
Funding: World Bank
Contract Value: 1,017,563 (~1,404,238 US$)

The consultant’s scope of service was mainly divided into 6 components. These included: 1) Review of the master plan of the catchments, 2) Identification of stakeholders and clearly show the positive and negative impacts of the project on the stakeholders, 3) Conduct the awareness creation and design training mechanisms for the population in the catchments, stakeholders & collaborators and the AAWSA staffs in the responsible Department & the Management respectively, 4) Study and design of Water Supply Sources, 5) Study and design various technologies for catchment rehabilitation which includes the study and design of 17 dams, soil conservation measures, silt traps, buffer zones, etc., 6) Training the appropriate staff of AAWSA. Regarding dams, four dams were designed in preliminary and detailed design Menjano, Doyo, Legeberi and Sendafa. Potential Hydropower production was examined.

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