| Description |
| Prince William Sound with its 3,000 miles of shoreline is surrounded by the Chugach Mountains to the east, west and north. Fifty-mile long Montague Island and several smaller islands form natural breakwaters between the Sound and the Gulf of Alaska. Between the barrier islands stretch underwater sills separating the Sound's deep waters from the much shallower waters of the Gulf. Deep water renewal occurs during the winter when cold winds from interior Alaska cool the surface waters causing them to sink, while the warmer bottom water rises to the surface bringing rich nutrients which support huge plankton blooms in the spring.Millions of years of glaciation gradually carved away a coastal plateau creating the sound with its many tributary fiords and passageways, islands and rocky shores. Fewer than 10,000 people live in the three towns-Whittier, Valdez, and Cordova- and two native villages-Chenega and Tatitlek situated on the shores of the Sound. Because the Sound was formed by millions of years of glaciation, its shorelines are heavily indented by deep fiords and many smaller bays. No roads connect these communities.
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