Pierrepont-sur-AvrePierrepont-sur-Avre is a former commune in the Somme department in Hauts-de-France in northern France. On 1 January 2019, it was merged into the new commune Trois-Rivières.WWW pierrepont-sur-avre.frGeographyThe commune is situated on the D935 road, some southeast of Amiens, on the banks of the river Avre.