Beko-Abo Multipurpose Project Pre-Feasibility Study Summary

Project Components

Component	Description
Dam Structure	RCC (Roller Compacted Concrete) dam with spillway, diversion culverts, and intake structure
Reservoir	Detailed plans showing elevation-area-volume curves and catchment area
Power Station	Underground powerhouse cavern with machine floor, generator floor, and turbine floor
Waterways	Northern and southern waterways with headrace tunnels and tailrace tunnels
Transmission System	400kV and 500kV switchyard layouts, transmission line routes to Debre Markos and Mandaya

Key Technical Specifications

• Dam Height: Approximately 200m (from foundation to top dam at EL 1064.5)
• Spillway Capacity: Design flood Q=1826.0 m³/s, PMF Q=16960 m³/s
• Powerhouse: Underground cavern with multiple levels (Machine Floor at EL 788.65, Generator Floor at EL 783.15, Turbine Floor at EL 777.25)
• Transmission: Proposed 400kV and 500kV lines connecting to national grid

Document Structure

Volume	Contents
Volume 2 (This document)	Project Drawings including: General arrangements Civil structures Mechanical/electrical equipment Transmission lines Geology Construction scheduling Roads
Volume 3	Supporting Overview (technical details)
Volume 4	Global Environmental and Socio-economic Assessment

Key Drawings Included

Project Location Context

The project is located on the Blue Nile River in Ethiopia, downstream of Lake Tana and Tissisat Falls. The surrounding area includes several other rivers and dams in the Blue Nile basin including:

• Beshilo River
• Guder River
• Finchaa River
• Mandaya Dam
• Didessa River
• Dabus River

Access and Infrastructure

The study includes detailed plans for:

• Internal roads within the project site
• Access tunnels to various facilities
• Alternative access roads from Kuch to Bridge Abay and from Inewind to Bure Road
• Permanent and temporary access routes