Flowing from Spain into Portugal, the Rio T\u00e2mega is a river that has shaped history. The T\u00e2mega starts its journey near Ver\u00edn in Spain. It travels through the Tr\u00e1s-os-Montes and Douro Litoral provinces of Portugal.
The Rio T\u00e2mega eventually joins the Douro River. The confluence happens near Entre-os-Rios. Interestingly, Entre-os-Rios translates to “between the rivers”. From Ver\u00edn, the T\u00e2mega flows southward to the Portuguese city of Chaves. After Chaves, it meanders through a fertile valley called the Veiga. Below Chaves, the river narrows, cutting through mountains and valleys.
Historically, the Rio T\u00e2mega was more important than it was economically. It served as an invasion route for foreign armies. These armies aimed to reach the richer southern lands of Portugal. The valley around Chaves witnessed many battles and invading forces.
Sadly, like many rivers, the Rio T\u00e2mega faced environmental challenges. Pollution and sand extraction harmed the water quality. Flooding was also a periodic concern.
However, efforts have been made to improve the river’s health. After the Torr\u00e3o dam was completed in 1988, the T\u00e2mega began to recover. The dam is located less than 1 kilometer above the Douro River, near Entre-os-Rios. Sand extraction activities were banned. Many cities upstream installed modern sewage treatment plants.
Looking ahead, a new dam was planned between Amarante and Mondim de Basto. This project aimed to produce electricity and control floods. The flood control system would divert water to the smaller Olo River.
In 2022, a 220 MW pumped-storage hydroelectricity facility began operating. This facility can store 40 GWh of electricity. The project cost 1.5 billion euros. Three more turbines are planned for the site. This would increase the storage power to 880 MW. The project includes two run-of-the-river hydroelectricity facilities.
The T\u00e2mega line, a narrow-gauge railway, once followed the river closely. Sadly, it closed in 2009. The Rio T\u00e2mega: a river of history, challenges, and renewal, flows on.