Sarıyar Dam is 23 kilometres (14.3 mi) north of Nallıhan

Nallihan

Nallıhan is a rural town and district of Ankara Province in the Central Anatolia region of Turkey, 157 km from the city of Ankara. According to 2010 census, population of the district is 30,571 of which 12,457 live in the town of Nallıhan...

 town 125 kilometres (77.7 mi) west of Ankara

Ankara

Ankara is the capital of Turkey and the country's second largest city after Istanbul. The city has a mean elevation of , and as of 2010 the metropolitan area in the entire Ankara Province had a population of 4.4 million....

 which is capital city of the country in central Turkey

Turkey

Turkey , known officially as the Republic of Turkey , is a Eurasian country located in Western Asia and in East Thrace in Southeastern Europe...

 and located 60 kilometres (37.3 mi) upstream of Gökçekaya Dam

Gökçekaya Dam

Gökçekaya Dam is north of Alpu town east of province of Eskişehir in central Turkey and located downstream of Sarıyar Dam on the Sakarya River which runs into the Black Sea....

 on the Sakarya River which runs into the Black Sea

Black Sea

The Black Sea is bounded by Europe, Anatolia and the Caucasus and is ultimately connected to the Atlantic Ocean via the Mediterranean and the Aegean seas and various straits. The Bosphorus strait connects it to the Sea of Marmara, and the strait of the Dardanelles connects that sea to the Aegean...

. It was completed in 1956. Total power output from the hydroelectric facility is 160 MW (four facilities of 40 MW each).