Sadd el-Kafara North Embankment Wadi Garawi
سد الكفرة - الجسر الشمالي · North Embankment Garawi Dam · Kafara North
Old Kingdom·4th Dynasty Egypt (Sneferu to Khufu horizon)·🇪🇬 Cairo Governorate (Helwan), Wadi Garawi east of Helwan, north flank of Sadd el-Kafara, Egypt
About
About Sadd el-Kafara North Embankment Wadi Garawi
North limestone-masonry embankment 55 m of the 4th-Dynasty Sadd el-Kafara (c.2700–2600 BCE, Sneferu/Khufu era), oldest large dam attempted worldwide: 113 m long, 14 m high, 98 m base, unfinished after flood breached central core during construction. North embankment is the better-preserved wing with staged rubble core, limestone facing and stepped downstream quarry face showing construction sequence — rubble lifts 1.2 m with gypsum mortar, evidencing the earliest phase of large rockfill hydraulic engineering before the Nile dam succeeded at Aswan 4500 years later. Breach channel in core is visible 18 m wide.
Why it mattersOldest known large dam (4th Dynasty), failure preserved illustrating Old Kingdom hydraulic experimentation preceding Aswan by millennia.
Open questions
Mysteries & theories
Mysteries
- 01Unfinished vs finished debate — Garbrecht vs Fahlbusch
- 02Flood magnitude estimate
Theories
- 01Royal power project at Helwan quarry town
- 02Hydraulic failure as Old Kingdom labour organization window
Theories are interpretations, not findings. The seal above tells you how much scholarly weight the place carries.
History
How it came to be
- Built
- c.2700–2600 BCE (4th Dynasty, Old Kingdom, unfinished)
- Period
- Old Kingdom
- Culture
- 4th Dynasty Egypt (Sneferu to Khufu horizon)
- Builders
- Old Kingdom dam corps (royal works crew)
- Purpose
- Wadi Garawi flood control and water storage for Helwan basalt quarry settlement
- Abandoned
- c.2650 BCE breach during construction (unfinished)
- Rediscovered
- 1885 Schweinfurth discovery; 1987 Garbrecht engineering re-survey; 2015 DAI-Helwan study
- Excavation
- Partially excavated
c.2700 BCE
North embankment staged construction
c.2650 BCE
Flash flood breach of unfinished core
1885
Schweinfurth rediscovery
On the ground
Structures & features
29.7980° N · 31.4300° E · 145 m · 2 mapped features
Gallery