Kouhrang Transfer Tunnels 1 and 2
Interbasin transfer tunnel, Tunnel 1 carries a mean transfer flow of 23 m3/s from the Karun basin to the Zayandeh Rud; tunnel 2 is 2.8 km long and 4.2 m in diameter and carries the spill of Kouhrang dam 1, the flows between dams 1 and 2 and the Marbaran, Kalanchin and Sardab springs; the associated Marbareh tunnel is 10.2 km long and 3 m in diameter in Iran.
The record
- Country
- Iran
- Location
- Kouhrang
- Coordinates
- 32.456, 50.105
- Technology
- Interbasin transfer tunnel
- Capacity
- Tunnel 1 carries a mean transfer flow of 23 m3/s from the Karun basin to the Zayandeh Rud; tunnel 2 is 2.8 km long and 4.2 m in diameter and carries the spill of Kouhrang dam 1, the flows between dams 1 and 2 and the Marbaran, Kalanchin and Sardab springs; the associated Marbareh tunnel is 10.2 km long and 3 m in diameter
- Capital cost
- —
- Stage
- Operational
- Owner or client
- Isfahan Regional Water Company
- Contractor
- —
- Operator
- Isfahan Regional Water Company
- Finance
- —
- Award or start year
- 1948
- Commissioned
- 1955
Record last checked 2026-09-20.
History
- 1948
studies and works begin on Kouhrang tunnel 1 (Iranian year 1327)
- 1955
tunnel 1 enters service (1333 to 1334)
- 1986
tunnel 2 enters service five kilometres south-east of the first (1364 to 1365)
Sources
2 references
Every field in the record above is taken from the references below. A field that none of them confirms prints as a dash.
- Isfahan Regional Water Company, Zayandeh Rud dam and power plant (static page, Persian). esrw.ir.
- MENA Water Review major projects register and PPP pipeline — compiled from procurer publications, development-bank project pages and trade reporting; each record names its source.
Under the heading of transfers from the Karun and Dez basins the owner records Kouhrang tunnel 1 with studies and works from 1327 and operation in 1333 to 1334 at a mean transfer flow of 23 m3/s; Kouhrang tunnel 2 five kilometres south-east of the first, in service in 1364 to 1365, 2.8 km long and 4.2 m in diameter; and a Cheshmeh Langan tunnel, for which no detail is given. The 23 m3/s is the owner's mean transfer rate and does not annualise to any contracted volume published on the page.