The Manajeba River is located in northern Madagascar. Its sources are situated near in the Tsaratanana Massif; it crosses the Route nationale 6 near Tanambao Marivorahona and flows into the Indian Ocean.
In January 2012, the bridge of 32 meters of the Route nationale 6 collapsed between Tanambao Marivorahona and the village of Marivorahona.RN6 Effondrement du pont
References Bauduin & Servat, Etude d'Hydrologie à usage Agricole - ORSTOM pp.1-829 - page 29