Mappe topografiche Washington County

Altitudine media: 128 m

Altitudine media: 146 m

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Altitudine media: 128 m

Altitudine media: 70 m

Altitudine media: 70 m

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The drainage area of the river is approximately 712 square miles (1,840 km2) with 27 creeks feeding into the Tualatin. Its watershed is 15 percent urbanized, 35 percent agricultural, and 50 percent forested. The river drops 1,800 feet (550 m) in elevation during its first 12 miles (19 km) and then only an…

Altitudine media: 117 m

Altitudine media: 61 m

Altitudine media: 49 m

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Altitudine media: 83 m

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Beaverton covers a total area of 19.7 square miles (51 km2), all of it land except for small creeks, ponds, and lakes. The city is located along the eastern edge of the Tualatin Valley just west of the Tualatin Mountains. It is bordered by Portland to the east, Hillsboro to the west, and Tigard to the south.…

Altitudine media: 106 m

Altitudine media: 113 m

Hillsboro is located at 45°31′N 122°59′W / 45.517°N 122.983°W / 45.517; -122.983 (Hillsboro, Oregon). The United States Census Bureau reports the city has a total area of 21.6 square miles (55.9 km2), all of which is land. In 2013, Hillsboro itself reported an area of 23.88 square miles…

Altitudine media: 53 m

Altitudine media: 51 m