Ancient Egyptians may have built a massive dam near the Red Pyramid

Two substantial structures, located near the Red Pyramid in Egypt, may potentially represent the remains of an ancient dam, a discovery that would indicate one of the earliest instances of major dam construction. The identification of these structures suggests a considerable level of technical proficiency and mastery over water management resources that was not previously presumed of the engineers responsible for the earliest pyramids.

The Red Pyramid, constructed during the 4th-dynasty reign of pharaoh Snefru, spanning from approximately 2613 to 2589 BC, marked the first true pyramid with a uniform, smooth slope on all sides, establishing a blueprint for the more renowned pyramids built later in Giza. Initial identification of these two structures, situated 40 meters away from the Red Pyramid in the Wadi Dahshur valley, was made in 1843.

However, this initial assumption that these structures were construction ramps or transport routes for limestone blocks has been challenged by recent research. Recent investigations, led by Xavier Landreau at Paleotechnic, a private research institute in France, and his team, have employed satellite imagery, historical maps, topographical modeling, and watershed analysis to scrutinize the structures.

Their findings clearly delineate the dimensions and positioning of the structures, measuring approximately 600 to 700 meters in length, 15 to 30 meters in width, and 6 or 7 meters in height. The structures are separated by a distance of about 200 meters and are arranged within a downward-sloping valley, indicating they are likely remnants of a large ancient dam.

The most compelling evidence is a "zigzagging" feature in the center of the structures, which does not align with the design of a transport ramp or road, but is more consistent with a floodwater management system. This unique feature strongly suggests that the ancient Egyptian engineers might have built the earliest known duckbill weir-style dam, a type of dam capable of managing floodwaters.

This dam design would have allowed for the regulation of flash floods, storage of millions of gallons of water, and the redirection of water directly to the construction site. If this dam was constructed, it would demonstrate that the ancient Egyptians harnessed water as a primary power source and transportation mechanism to move multi-tonne blocks, thereby fundamentally altering the conventional historical narrative of pyramid construction.

Furthermore, Snefru's reign is also associated with other early hydrological projects, such as the Sadd el-Kafara dam, located further north, which was known to have collapsed after a significant flood. The potential discovery of the dam near the Red Pyramid could suggest that Snefru's architects learned from their past mistakes, designing a dam capable of withstanding powerful flooding from the Nile.