The Dobra is a river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 located mostly in the Karlovac County

Karlovac County

Karlovac County is a county in central Croatia, with the administrative center in Karlovac.The city of Karlovac is another fort from the times of the Military Frontier...

 in the Republic of Croatia

Croatia

Croatia , officially the Republic of Croatia , is a unitary democratic parliamentary republic in Europe at the crossroads of the Mitteleuropa, the Balkans, and the Mediterranean. Its capital and largest city is Zagreb. The country is divided into 20 counties and the city of Zagreb. Croatia covers ...

. It is 104 kilometres (64.6 mi) long and its basin covers an area of 900 square kilometres (347.5 sq mi).

Dobra rises in Gorski Kotar

Gorski kotar

Gorski kotar is the mountainous region in Croatia between Karlovac and Rijeka. Together with Lika and the Ogulin-Plaški valley it forms Mountainous Croatia. Because 63% of its surface is forested it is popularly called the green lungs of Croatia or Croatian Switzerland...

 near Skrad

Skrad

Skrad is a municipality in the Primorje-Gorski Kotar County in western Croatia. There are 1,054 inhabitants , with 97% Croats .-References:...

 and Ravna Gora

Ravna Gora, Croatia

Ravna Gora is a village in western Croatia, located between Delnice and Vrbovsko in the mountainous region of Gorski Kotar. It is the seat of a municipality whose total population is 2,439 , with 1,721 in Ravna gora itself and the rest in five smaller villages.-References:...

, where it flows first to the north and then turns to the east. It flows past Vrbovsko

Vrbovsko

Vrbovsko is a town in western Croatia, situated at the far east of the mountainous region of Gorski kotar in the Primorje-Gorski Kotar county; on its 280 square kilometers area, Vrbovsko features 60 settlements and a total of 5,019 inhabitants...

, to the southeast into the city of Ogulin

Ogulin

Ogulin is a town in north-western Croatia, in Karlovac County. It has a population of 8,712 , and a total municipal population of 15,054...

, where it becomes an underground stream. It takes a sharp northward turn and rises back to the surface north of Ogulin. It continues to the northeast, past the Lešće

Lesce

Lesce is a town in the Radovljica municipality in the Upper Carniola region of Slovenia. It is an industrial as well as a tourist centre.It is one of the oldest mentioned settlements in the region, first noted in a document from 1004 together with Bled and Bohinj...

 spa and a hydroelectric plant (built and in test operation ), running in parallel to the Kupa

Kupa

Kupa may refer to:*Kupa River, a river in Croatia and Slovenia*Kupa River , a river in Lithuania*Kupa River in Siberia, see Kuta River*Kupa Synagogue, a synagogue in Krakow*Kupa, Hungary, a village in Northern Hungary...

 and Mrežnica

Mreznica

The Mrežnica is a river in Karlovac County, Croatia.It is long and its basin covers an area of .Mrežnica is considered special due to its large number of waterfalls, totalling 93...

, and finally flows into the Kupa north of Karlovac

Karlovac

Karlovac is a city and municipality in central Croatia. The city proper has a population of 49,082, while the municipality has a population of 59,395 inhabitants .Karlovac is the administrative centre of Karlovac County...

.

North of Ogulin, near Gojak, the water of Dobra is harvested for the Gojak Hydroelectric Power Plant

Gojak Hydroelectric Power Plant

Gojak Hydroelectric Power Plant is a hydroelectric power plant on river Dobra, near the town of Ogulin, in Karlovac County, Croatia.The Gojak Hydroelectric Power Plant is a high pressure diversion plant which harnesses the river power of the Ogulinska Dobra and Zagorska Mrežnica rivers.It is...

, a hydroelectric power plant built to utilize the rivers Dobra and Mrežnica

Mreznica

The Mrežnica is a river in Karlovac County, Croatia.It is long and its basin covers an area of .Mrežnica is considered special due to its large number of waterfalls, totalling 93...

.

Two motorway bridges have been built over the Dobra: the Dobra Bridge (A1)

Dobra Bridge (A1)

The Dobra Bridge is located between Karlovac and Novigrad interchanges of the A1 motorway in Croatia, spanning Dobra River. It is long, and it comprises four traffic lanes and two emergency lanes....

 and the Dobra Bridge (A6)

Dobra Bridge (A6)

Dobra Bridge is located between the Vrbovsko and Ravna Gora interchanges of the A6 motorway in Gorski Kotar, Croatia, spanning Dobra River. It is long and carries the motorway across five spans. The bridge consists of two parallel structures, both completed in 2003 by Primorje...

.