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| Alaska- Turnagain Arm |
The long fjord than runs about 50 miles SE from its opening by Anchorage to the land connection with Kenai Peninsula. The railroad and the Seward Highway follow the edge of the fjord to its beginning at the Portage Road turnoff. The fjord ends there, but the highway and rail lines continue south to the port town of Seward.
Unlike most fjords along the open ocean, Turnagain Arm is very shallow because it opens into Cook Inlet- and the heavy amounts of glacial silt feeding into it are very slowly carried away. At low tide much of the fjord is mud all the way across. There is a 40-foot+ tidal change in Cook Inlet, but very few waves or other turbulent sea water movement.