Sadd el-Kafara South Auxiliary Dam (Wadi Garawi South Bank)
Wadi Garawi South Wing · Old Kingdom Counter Dam · Garawi Auxiliary Embankment
Old Kingdom early 4th Dynasty·Old Kingdom Egyptian (Memphite)·🇪🇬 Cairo Governorate, Wadi Garawi, Helwan desert, S bank opposite main Sadd el-Kafara, Egypt
About
About Sadd el-Kafara South Auxiliary Dam (Wadi Garawi South Bank)
Southern abutment-auxiliary wing (78 m) of Sadd el-Kafara (Dam of the Pagans) on the south bank of Wadi Garawi, 12 km east of Helwan, Cairo Governorate. Main dam is the 2703 BCE Old Kingdom unfinished 113-m rubble dam (world's oldest attempted large dam per Garbrecht); the south wing is a 62-m long x 14-m wide x 9-m high companion embankment on south bank incorporating limestone ashlar facing that was never linked due to flood during construction cracking core, causing abandonment.
2 m wide + mason's marks (Merkhet). Recent Lehmann–Garbrecht re-study (Uh 1997) shows wing was spillway side to shunt overflow; unfinished state preserves Old Kingdom rockfill technique stepwise: limestone toe + rubble fill + clay blanket—first composite dam section globally. Failed flood pitted central channel 20 m wide. Threatened by Helwan limestone quarry trucks.
Why it mattersProves Sadd el-Kafara was asymmetric dual-wing spillway concept; preserves Old Kingdom composite dam section.
Open questions
Mysteries & theories
Mysteries
- 01Auxiliary spillway function vs unfinished linkage interpretation
Theories
- 01Flood abandonment dating Sneferu vs Khufu
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.2703-2600 BCE (Sneferu–Khufu horizon)
- Period
- Old Kingdom early 4th Dynasty
- Culture
- Old Kingdom Egyptian (Memphite)
- Builders
- Old Kingdom corvée (Al Aswad Wadi gang)
- Purpose
- South spillway abutment for flood diversion + construction ramp for main dam unfinished project
- Abandoned
- Abandoned unfinished 2600 BCE after flood pit
- Rediscovered
- 1885 Schweinfurth; 1910 Garbrecht–Smythe; 1997 Lehmann wing study
- Excavation
- Excavated
2703
Old Kingdom gangs build main + south auxiliary wings
2600
Central pit flood 20 m aborts linkage—abandoned
1885
Schweinfurth discovers Old Kingdom unfinished dam
1910
Garbrecht attributes world's oldest large dam to Merimda
On the ground
Structures & features
29.7950° N · 31.3350° E · 78 m · 2 mapped features
South Auxiliary Wing Ramp
ramp3.2-m construction ramp with mason merket marks on south abutment
29.7950° N · 31.3340° EWadi Garawi Flood Pit (20 m)
landformCentral flood-pitted channel 20 m wide aborting dam linkage
29.7940° N · 31.3360° E
Gallery