The Egyptians built the first dam some 4000 years ago. It took 10-15 years to make. However, the dam, Sadd Al-Kafara ,washed away soon after completion.
The world’s first dam was built over 4,000 years ago, by the Egyptians. The add Al-Kafara dam at Wadi Al-Garawi was about 100 meters wide, and did not use any mortar. It collapsed very soon after it’s creation due to heavy rainfall eroding the dam.
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