Its source is confluence of the Stupčanica and the Bioštica rivers at the western outskirts of town of Olovo.

Finally, the Krivaja meets the Bosna River in the vicinity of town of Zavidovići.

[2] The Kaljina, its parent the Bioštica, and the Stupčanica are the main source of the Krivaja waters, and all three are unspoiled in terms of water quality, their hydromorphology, natural surrounding and river biodiversity.

[3] Rich pool of indigenous salmonids such as Danube brown trout (Salo truta fario, Danube lineage), spawning grounds for hucho and nase, can only be maintained through statutory protection, and preservation of the Krivaja basin streams and rivers uninterrupted flows from construction of dams.

However, plans for hydropower development exist, and represent real risk for the unspoiled natural environment of the region.