EMBANKMENT DAM with EXTERNAL CONCRETE SPILLWAY near MANDAWA VILLAGE REGION OF KURDISTAN (IRAQ)

Activities: 2011 – in progress. Preliminary delivered and approved; Detailed Design nearing completion
Client: Ministry of Agriculture and Water Resources (Iraq-Kurdistan) - Amount of works: US$ 632.100.000

• Type of the dam:
Embankment, with some concrete elements for ancillary works on left side. Length of the embankment: 918 m
Length of concrete dam: 170 m
Total length: 1063 m
• Height of the dam: 54.5 m from river bottom
• Dam crest elevation: 361.5 m a.s.l.
• NWL: 350.0 m a.s.l.
• Max WL: ~ 356.3 m a.s.l. for flood of 1000 years RP
• Exceptional Max WL: ~ 359.6 m a.s.l. for flood of 10000 years RP and 2 blocked gates
• Min WL: ~ 335.5 m a.s.l.
• Reservoir capacity: 330 x 106 m3 at NWL, 520 x 106 at MWL
• Dead storage: 67.5 x 106 m3 at 333.0 m a.s.l.
• Reservoir area: 30 km2 at MWL
• Catchment area: 18500 km2
• Spillway; structure located on right side and consisting in two free sills and a gated sill – design flow: 16357 m3/s (1000 years RP).

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