Amibara Irrigation Project II - Contract Drawings Summary
Project Overview
The document contains contract drawings for the Amibara Irrigation Project II in Ethiopia's Awash Valley, covering Contracts 2E (Melka Sadi On-Farm Works) and 2F (Amibara On-Farm Works). The project is managed by the Awash Valley Development Agency with consulting by Sir William Halcrow & Partners.
Key Components
- Infrastructure: Primary/secondary canals, drains, weirs, headworks, culverts, and access roads
- Structures: Check/drop structures, spillways, bridges, and off-take points
- Areas Covered: Melka Sadi and Amibara state farms, AVDA settlement areas
- Design Standards: Reinforced concrete structures with 50mm reinforcement cover
Contract Drawing Index
| Drawing No. | Title | Contracts |
|---|---|---|
| MSA 1-2 | Project Area Layout | All |
| MSA 6-11 | Melka Sadi Weir & Headworks | 2A |
| MSA 16-24 | Primary/Secondary Canals & Drains | 2B-2C |
| MSA 28-42 | Structures (Drops, Spillways, Culverts) | 2B-2F |
| MSA 41 | Typical On-Farm Layout | 2E-2F |
Implementation Timeline
Contract 2F (Amibara)
- Section 1 (31% area): 65 weeks (land clearance to structures)
- Section 2 (23% area): 169 weeks total duration
- Section 3 (34% area): 169 weeks
- Section 4 (12% area): 195 weeks
Contract 2E (Melka Sadi)
- Section 1 (24% area): 65 weeks
- Section 2 (30% area): 117 weeks
- Section 3 (32% area): 169 weeks
- Section 4 (14% area): 192 weeks
Key Specifications
- All levels in meters above Blue Nile Datum
- Dimensions in millimeters unless specified
- 40mm fillets/chamfers on concrete edges
- 1:30 cross fall for embankment tops
- 300mm thick dry pitching with graded filters