National Water and Sanitation Authority (NWSA), Aden


Al-Mukalla, Yemen

Al-Mukallah Water Supply System (First Stage)

PROJECT GOAL Provide adequate water at minimum cost
<< Back
Print this case study

The objective of the project is to increase water production to meet the actual demand required for Al-Mukalla. Water is conveyed to Al-Mukalla from the existing Wadi Buwaysh wells producing 40 1/sec and the new An Nagaah wellfield which adds 138 1/sec.

The project comprises the development of a new wellfield at An Nagaah by the drilling of twelve boreholes equipped with wellscreens and borehole electrosubmersible pumps. Water is conveyed through a 400 mm pipeline to a 400 m3 collection tank. At Wadi Buwaysh an additional three boreholes are drilled and developed to replace existing wells. Water from the collection tank at An Nagaah is conveyed through a 600 min pipeline to Al-Sedad by means of a new 800 m3 reservoir at Al Huwayrah. From Al-Sedad reservoir a 400 mm pipeline is laid around Al-Mukalla to Bagrain and Al-Omal areas. A booster pump stations are built at Wadi Buwaysh. Moreover, two reservoirs are built at Al-Sedad (1 200 m3) and at Al-Omal (2 000 m3).


Phase 1: Preconstruction Services:

  • Review and approve tender documents for the supply and delivery of water well casings and screens.

  • Review and approve tender documents for drilling and testing of boreholes.

  • Review and approve tender documents for construction of pump stations, reservoirs and pipelines.

  • Contractor prequalification procedures and preparation of prequalification list.

  • Assist NWSA in tender evaluation and award of contracts.

Phase 2: Construction Supervision Services:
Provide complete construction supervision services including: review and approval of contractor furnished designs and drawings; continuous site supervision of construction and electro-mechanical installations, and outside inspection in suppliers factories.

Phase 3: Technical Assistance:
Provide NWSA with technical assistance services during construction of the project, on-the-job and overseas (Egypt) training.

Types of activities

Click on thumbnail to change image.
Click on large image to view it at full resolution.

by DMICreative

Printed from the ECG website

Page: Projects > Water and Wastewater > Al-Mukallah Water Supply System (First Stage)