Gerede Water Transfer Tunnel
Interbasin transfer tunnel, 31.6 km tunnel, 4.5 m diameter; 226 million m3/year transferred by gravity in Turkey.
Operational
The record
- Country
- Turkey
- Location
- Gerede (Bolu) to Çamlıdere, Ankara
- Coordinates
- 40.388, 32.383
- Technology
- Interbasin transfer tunnel
- Capacity
- 31.6 km tunnel, 4.5 m diameter; 226 million m3/year transferred by gravity
- Capital cost
- —
- Stage
- Operational
- Owner or client
- General Directorate of State Hydraulic Works (DSI)
- Contractor
- —
- Operator
- DSI, delivering to ASKI at the Camlidere reservoir
- Finance
- —
- Award or start year
- 2020
- Commissioned
- 2020
Record last checked 2026-09-18.
History
- 2011-01
Tunnel section of 31,592 m under way, contractor Kolin Insaat, financed on Japanese credit
- 2020-07
Ministry of Agriculture and Forestry reported 166 million m3 delivered to Ankara in the tunnel's first six months of operation
Sources
3 references
Every field in the record above is taken from the references below. A field that none of them confirms prints as a dash.
- Ministry of Agriculture and Forestry, Turkiye'nin en uzun icme suyu tuneli baskente ilk 6 ayda 166 milyon metrekup su tasidi, 29 July 2020. tarimorman.gov.tr.
- Gives a 31.6 km tunnel of 4.5 m diameter bored by three tunnel boring machines, 226 million m3 a year transferred to Ankara by gravity, 166 million m3 delivered in the first six months of operation, a total investment of about 1.273 billion lira, a route from south east of Gerede in Bolu to the Camlidere dam, and a design horizon to 2050. Hurriyet, Ankara'ya dev su projesi, 12 January 2011. hurriyet.com.tr.
- 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.
Records the tunnel section of 31,592 m at 4.5 m diameter with a 40 m3/s capacity, contractor Kolin Insaat and Japanese credit financing. Camlidere dam coordinates, the tunnel outlet, from OpenStreetMap.