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Home  Education  Currents  Longshore Currents
  << Back Barrier Islands  In 1927, the lighthouse on Tucker's Island, NJ was destroyed when powerful longshore currents washed over 300 yards of the surrounding land out to sea.
   Longshore drift has a very powerful influence on the shape and  composition of the coastline. It changes the slopes of beaches and  creates long, narrow shoals of land called spits, that extend out from  shore. Longshore drift may also create or destroy entire “barrier  islands” along a shoreline.  A barrier island is a long offshore  deposit of sand situated parallel to the coast.  As longshore drifts  deposit, remove, and redeposit sand, barrier islands constantly change. Tucker’s  Island, New Jersey, is a barrier island that clearly illustrates how  longshore drift and strong weather affect these transient sand  deposits. The island was first settled in 1735. Since its settlement,  residents have had to move the island’s lighthouse several times  because the channels shifted constantly as a result of longshore drift.  Eventually, they placed the lighthouse on high ground at the island's  northern end.  Meanwhile, the inlet north of Tucker’s Island—Beach Haven inlet—was also affected by longshore drift. At times, the inlet was narrow or nonexistent and Tucker’s Island was attached to the nearby Long Beach Island. At other times, the inlet was wide, and Tucker’s Island was separated  from Long Beach Island.  Powerful longshore currents causing longshore drift washed Tucker's   Island away. Click the images to view a series of maps from 1856-2005   that show how Tucker's Island changed shape and eventually disappeared.
  In 1924, in an effort to stop the beach erosion that was occurring on  Tucker’s Island, experts installed jetties. They were initially  successful in halting the erosion, but the jetties worked so well that  the currents of Beach Haven inlet began to wash in the other  direction—toward Tucker’s Island. As the inlet began to widen, the  island then began to erode very quickly. By 1927, just three years  after the jetties were installed, waves and longshore drift washed away  most of the beach. Later that year, the remaining 300 yards of beach  were washed away in a series of storms. Then, in a final dramatic  display, the lighthouse fell into the sea!






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