Ethiopia–Sudan border in the context of Grand Ethiopian Renaissance Dam

The Grand Ethiopian Renaissance Dam (GERD or TaIHiGe; Amharic: ታላቁ የኢትዮጵያ ሕዳሴ ግድብ, romanized: Tālāqu ye-Ītyōppyā Hidāsē Gidib, Tigrinya: ግድብ ሕዳሰ ኢትዮጵያ, Somali: Biyo Xidheenka Wayn ee Itoobiya), formerly known as the Millennium Dam and sometimes referred to as the Hidase Dam (Amharic: ሕዳሴ ግድብ, romanized: Hidāsē Gidib, Oromo: Hidha Hidāsē), is a gravity dam on the Blue Nile River in Ethiopia. The dam is in the Metekel Zone of the Benishangul-Gumuz Region, close to the border with Sudan.

Constructed between 2011 and 2023, the dam's primary purpose is electricity production to relieve Ethiopia's acute energy shortage and to export electricity to neighbouring countries. With an installed capacity of 5.15 gigawatts, the dam is the largest hydroelectric power plant in Africa and among the 20 largest in the world.

Metemma (Amharic: መተማ), also known as Metemma Yohannes, is a town in northwestern Ethiopia, on the border with Sudan. Located in the Semien Gondar Zone of the Amhara Region, Metemma has a latitude and longitude of 12°58′N 36°12′E / 12.967°N 36.200°E / 12.967; 36.200 with an elevation of 685 meters above sea level. Across the border is the corresponding Sudanese village of Gallabat.

Metemma hosts an airport (ICAO code HAMM, IATA ETE).