The Rio Grande

　　Although not the longest in America, the Rio Grande is one of the most important. But, unlike other significant rivers, it is not used for shipping. In fact, ocean-going ships cannot sail on its water. _____36_____ Since 1846, it has been the official border of Texas and Mexico.

　　Rio Grande Geography

　　The Rio Grande is either the fourth or fifth longest river system in North America. It all depends on how it is measured. _____37_____and these course movements can cause it to be longer or shorter. At its last official measure, the Rio Grande clocked in at 1896 miles. The river starts in Colorado and extends downward to the Gulf of Mexico.

　　_____38_____ Not only does the river extend south, but it also starts in the mountains and gets lower and lower in altitude as it extends to the Gulf.

　　The Rio Grande Today

　　_____39_____ Sadly, much of the water has been used up and parts of the river are most dry! This is because people take more water from the river than the river can get back from rain and other sources. Experts are working to correct this, though, with hopes of restoring the river to its past strength.

　　Today, the river is important as a source of water for Texas and Mexicans. _____40_____ Though borders like the Rio Grande separate nations, they are also shared spaces. The Rio Grande is therefore a symbol of friendship and peace between two peoples.

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