Badush Dam

Concerns over the stability of the Mosul Dam significantly contributed to recent efforts to restart construction of the Badush Dam, and possibly expand it as well.

As early as December 2005, Iraq's Ministry of Water Resources was developing a project to restart construction on the dam. Currently, it would cost about US$300 million to complete the initial design but the Government of Iraq is wary of spending an additional US$10 billion to expand the dam's size in order to help mitigate a potential failure of the Mosul Dam.^[1]

The current project contains a main earth-fill dam with an inclined clay core and other random fills, two saddle dams (earth-fill dams) at the left bank and a 240-metre (790 ft) concrete dam (hollow buttress type) at the right bank. The concrete dam includes eight bottom outlets, a spillway and four power intakes and conduits, a stilling basin, headrace and tailrace channels. There is a power house, close to the concrete dam. The Badush Dam's spillway will have a maximum output of 4,000 cubic metres per second (140,000 cu ft/s); each hydro-power unit will have a capacity of 275 cubic metres per second (9,700 cu ft/s) for a total of 1,100 cubic metres per second (39,000 cu ft/s). The bottom outlets, power station and spillway combined afford a discharge capacity of 13,100 m³/s (460,000 cu ft/s)^[2]

The normal reservoir level is 245.5 m (805 ft) above sea level and the maximum level is 307 m (1,007 ft). The 61.5 m (202 ft) allowance between the normal and maximum is for flood protection from a Mosul Dam collapse. At its maximum level the Badush reservoir can hold 10,000,000,000 m³ (8,100,000 acre⋅ft), enough to absorb and pass a Mosul Dam wave, according to a wave study.^[3]