Jawa Dam North Basalt Dam — Mafraq Wadi Rajil
سد جاوا الشمالي · Jawa North · Wadi Rajil North Dam
Late Chalcolithic–Early Bronze Age·Late Chalcolithic pastoral proto-urban·🇯🇴 Mafraq Governorate, Jawa town, Wadi Rajil, Basalt Desert (Harra) edge, Jordan
About
About Jawa Dam North Basalt Dam — Mafraq Wadi Rajil
North basalt rubble dam across the western arm of Wadi Rajil 1.8 km north of the main Jawa (c.3000 BCE) dam and fortified town (32.335,37.022) in the Jordanian Harra (Black Desert) 980 m, Mafraq. 80-m × 5-m basalt rubble with earth core, part of the world's earliest dam system (c.3200–3000 BCE, Helms Swedish Expedition 1966–76) with 5 dams, 8 reservoirs total 30000 m³ capturing Wadi Rajil winter floods for desert town of 3000, proto-urban basalt architecture. Main Jawa town fortified with basalt walls 70 loci; north dam fed the north town extension and field system. 4th millennium BCE, contemporary with Jawa Dam south (15 m wide main). Department of Antiquities.
Why it mattersWorld's oldest dam-system element with proto-urban Jawa 3000, documenting Harra desert irrigation before Egypt Sadd el-Kafara.
Open questions
Mysteries & theories
Mysteries
- 01Proto-urban enigma Jawa vanishing 3000 BCE
- 02Rubble dam sealing with basalt only
Theories
- 01Harra pastoral sedentarization experiment
- 02Pre-state town reservoir as social complexity test
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.3200–3000 BCE (Late Chalcolithic–Early Bronze IA)
- Period
- Late Chalcolithic–Early Bronze Age
- Culture
- Late Chalcolithic pastoral proto-urban
- Builders
- Harra basalt villagers (proto-urban Jawa 3000)
- Purpose
- Wadi Rajil flood capture for desert town 3000 people, town reservoir and field irrigation
- Abandoned
- c.3000 BCE with EB I and climate
- Rediscovered
- 1931 Rees aerial; 1966 Helms Swedish; 1976 Betts
- Excavation
- Excavated
3200 BCE
North dam first rubble
3000 BCE
Town fortified with 5-dam system
1966
Helms Swedish expedition
On the ground
Structures & features
32.3350° N · 37.0220° E · 980 m · 2 mapped features
North Dam — Basalt Rubble Dam Wall 5-m high
rubble dam5-m high × 80-m basalt rubble gravity dam across Wadi Rajil west arm with upstream puddle
32.3360° N · 37.0230° ENorth Dam — Reservoir and Gate Tower
reservoir towerReservoir 10 ha with gate tower controlling north channel to Jawa town 3000 BCE town reservoir system
32.3340° N · 37.0210° E