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How deep is the Rio Grande?

The Rio Grande in the United States or the Río Bravo in Mexico is one of the principal rivers in the southwestern United States and in northern Mexico. The length of the Rio Grande is 1,896 miles, making it the 4th longest river in the United States and in North America by main stem.



The depth of the Rio Grande varies dramatically depending on its location and the season, as it is a river heavily impacted by irrigation demands and drought. In many stretches along the U.S.-Mexico border, the river is surprisingly shallow, often reaching depths of only 2 to 4 feet, which allows for "wading" in certain areas. However, the river's geography includes much deeper, more dangerous sections. For instance, as it flows through the "Big Bend" region of Texas, the Rio Grande cuts through massive canyons where the water can be quite deep and the currents much stronger. In northern New Mexico, the river carves through the Rio Grande Gorge, which is 800 feet deep, though the water itself at the bottom typically ranges from 10 to 20 feet deep depending on snowmelt runoff. Near its mouth at the Gulf of Mexico, the depth can increase significantly, but historically, the river has struggled with such low flow that it occasionally fails to reach the sea. For travelers and those near the border, the "average" depth is often misleading because hidden drop-offs and "holes" in the riverbed can create pockets of water over 10 feet deep even in seemingly shallow areas.

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The Rio Grande is 60 feet at its deepest points and about 6 to 20 feet at its shallowest points. Depth varies throughout the river, depending on the time of the year (the river is more profound during the spring runoff than in late summer).

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Use of a personal flotation device is required for everyone in the boat. Swimming in the Rio Grande is highly discouraged. The presence of sunken debris poses a risk of injuries and being caught and dragged under the water by the current.

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In south-central Colorado, the Rio Grande, its tributaries and the water flowing underground supports communities across the San Luis Valley, an 8,000 square-mile high elevation desert that sees less than seven inches of precipitation per year.

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At the river's headwaters, the water is “pristine,” Ganjegunte said. By the time the river reaches El Paso, the salinity of the water is above 1,000 parts per million. Water above 1,000 parts per million is no longer considered freshwater and, while still safe to drink, is above secondary drinking water standards.

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The bodies of two migrants were recovered from the Rio Grande separating the US and Mexico this week, including a three-year-old child.

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The Congo is the deepest river in the world. Its headwaters are in the north-east of Zambia, between Lake Tanganyika and Lake Nyasa (Malawi), 1760 metres above sea level; it flows into the Atlantic Ocean.

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Diversions for municipal and agricultural use already claim some 95 percent of the Rio Grande's average annual flow, and Elephant Butte's gates now only open during a short irrigation season.

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