Aleltu Hydroelectric Project Summary
Project Overview
The Aleltu Hydroelectric Project is a feasibility study for a hydroelectric power development in Ethiopia, conducted by Acres International Limited in July 1994. The project involves the construction of dams, tunnels, and power generation facilities in the Aleltu East region.
Key Components
1. Infrastructure
- Access roads (permanent and construction roads)
- Construction and camp power facilities
- Construction camps and housing
2. Dams
- Chacha Main Dam (rock-fill with impervious core)
- Chacha Saddle Dams
- Rikicha Gomoro Dam (fill dam with uncontrolled spillway)
3. Power Generation
- 3 x 62 MW vertical axis Pelton turbines
- Power tunnel with low and high pressure sections
- Powerhouse at the confluence of Jida and Zega Wedem rivers
Cost Estimate (December 1993)
| Item | Description | Amount (US$) |
|---|---|---|
| 1.1 | Access Roads | 20,466,000 |
| 1.2 | Construction and Camp Power | Not specified |
| 4.1 | Chacha Main Dam | 16,223,153 |
| 4.2 | Chacha Saddle Dams | 7,618,816 |
| 4.3 | Rikicha Gomoro Dam | 80,056,158 |
| Total Construction Cost | 338,742,931 | |
| Total Estimated Cost | 378,400,000 |
Environmental Impact Assessment
Existing Environment
The project area is located on the high plateau of Central Ethiopia with elevations between 2500-2700m. The region has a temperate climate with heavy rainfall from June to October.
Key Environmental Considerations
- Physical environment: Topography, geology, soils, and hydrology
- Biological environment: Terrestrial and aquatic ecosystems
- Sociocultural environment: Population, land use, and infrastructure
Mitigation Measures
The report proposes various mitigation measures for construction and operational phases, including:
- Atmospheric impact mitigation
- Terrestrial and aquatic impact mitigation
- Social impact mitigation
- Residual and cumulative impact mitigation
Conclusion
The Aleltu Hydroelectric Project represents a significant infrastructure development for Ethiopia's power generation capacity. The feasibility study provides detailed cost estimates and environmental assessments to guide project implementation while minimizing environmental and social impacts.