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The Upper Galveston Bay Shoreline watershed is located in southeastern Harris County and has a population of about 20,000. This watershed is known as the “outfall” (the place where all water drains) in Harris County. It has two primary streams, Little Cedar Bayou and Pine Gully with many tributary streams that, all together, comprise about 24 miles of open streams. Galveston Bay itself, is influenced by tides and can be seriously affected by storm surge. The Houston Ship Channel is adjacent to the Upper Galveston Bay Shoreline watershed. Many areas within the watershed are environmentally sensitive which is unfortunate because the area has significant industrial and petrochemical development and is said to have the 4th highest level of toxic chemicals in the United States. This is critical because Galveston Bay itself, is the 7th largest estuary in the United States and supports spawning grounds for fish, crab, shrimp, and oysters; it also provides marine habitat for bottlenose dolphins. Galveston Bay is the 2nd most productive estuary in the U.S. The ecosystem is also home to the American alligator, bobcats, pelicans, yellow rail, and purple gallinule.