The Abatesco (Corsican: Abatescu) is a French coastal river which flows through the Haute-Corse department and empties into the Tyrrhenian Sea.

In the valley, in the places called Abbazia, Agnatello, Calzarello and Catastajo, a whole wood industry was born and prospered, run by the FORTEF company (Forêts - Terres et Forces du Fiumorbo).

[15] In particular, at the height of 69 metres (226 ft) on the Abatesco, a dam was built and hydroelectric plants (horizontal Pelton type or Francis type turbines[16]) at the place called Agnatello, supplied the timber industry which also existed at less than a kilometer, at a place called Abbazia at altitudes of 54 to 38 metres (177 to 125 ft).

[17] By the sea, less than 1 kilometre (0.62 mi), and at an altitude of 9 metres (30 ft) the RT 10 (formerly RN 198) passes over the Abatesco.

The old Roman road crossed about 500 metres (1,600 ft) further north-west of this bridge, near the place called Chiarata.