Gouina sits on the upper Sénégal in the Kayes Region of western Mali, downstream of the town of Bafoulabé and upstream of Diamou. Just before the falls, the river squeezes through the Talari Gorges and bends to run north toward the dry country and, eventually, the Atlantic. The setting is Sahelian: hot, broad-skied, the savanna brittle and golden through the long dry months. The falls are the kind of landmark that organizes a whole landscape. For centuries this stretch of the Sénégal was a route for trade and travel into the interior, and the broad white break of Gouina was both a marker and a barrier on the way.

Few waterfalls change as dramatically through the year as Gouina. The flow can swing from twelve or thirteen cubic meters per second in the dry months to roughly twenty-four hundred at the peak of the rains, a difference of nearly two hundredfold. In the dry season the cataract breaks into channels among exposed black rock, almost gentle. After the summer rains feed the Bafing and Bakoy headwaters far upstream in the highlands of Guinea, the river swells and the whole five-hundred-meter span goes white. Mist hangs over the gorge. The sound carries. It is the same river, the same ledge, transformed by the calendar.

A waterfall this powerful was always going to attract engineers. Mali and the Senegal River Basin Development Authority spent decades studying the river's potential, and in December 2013 construction began on the 140-megawatt Gouina Hydroelectric Plant. It joined a chain of works on the Sénégal: the older Félou plant just downstream, first built in 1927 and rebuilt in 2014, and the great Manantali Dam far upstream. Gouina was inaugurated in December 2022 by Mali's prime minister, Abdoulaye Maïga, at a cost of 283 billion CFA francs, roughly 424 million euros. The dam draws power from the same drop that gives the falls their thunder, turning a seasonal spectacle into year-round electricity for a region that has long lacked it.

There is a quiet tension at Gouina now, the kind that follows every dam. The falls that gave the place its name and its nickname share their ledge with the machinery that harnesses them. For the towns of the Kayes Region, the electricity matters: reliable power is scarce in this part of West Africa, and the Sénégal is one of its great untapped resources. For the traveler who has come a long way to stand at the edge of the gorge, the draw is still the water itself, the wide brown river going suddenly white, the mist rising off the rocks, the sound that fills the valley when the rains have done their work.