Onion Creek topographic map

Average elevation: 317 m

Average elevation: 89 m

Addicks Reservoir is formed by a rolled earthen dam 61,666 feet (18,796 m) long and above the streambed. A 12-foot-wide (3.7 m) gravel road extends along the top of the dam. The top of the dam has a maximum elevation of 121 feet (37 m) above the NAVD 1988 and is almost 50 feet high in points. The maximum…

Average elevation: 31 m

Average elevation: 1,101 m

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Average elevation: 578 m

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Average elevation: 281 m

Average elevation: 1,689 m

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Average elevation: 1,025 m

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Average elevation: 186 m

Dallas and its surrounding area are mostly flat. The city lies at elevations ranging from 450 to 550 feet (137 to 168 m) above sea level. The western edge of the Austin Chalk Formation, a limestone escarpment (also known as the "White Rock Escarpment"), rises 230 feet (70 m) and runs roughly north–south…

Average elevation: 158 m

Average elevation: 5 m

Average elevation: 409 m

Average elevation: 136 m

After Hurricane Ike hit Texas in September 2008, Galveston County officials offered a debris removal program to residents in unincorporated areas, including Bacliff.[23][24] Flooding from hurricane Ike was minimized due in part to Bacliff's relatively high elevation of 16 feet.[citation needed]

Average elevation: 4 m

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Average elevation: 492 m

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Average elevation: 763 m

The elevation is 2,549 feet (777 m).

Average elevation: 779 m

Average elevation: 280 m

Average elevation: 310 m

Average elevation: 882 m

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Average elevation: 452 m

Average elevation: 193 m

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Average elevation: 237 m