b. Cape Henlopen, Delaware. 



Figure 24. Aerial view southeastward toward Cape Henlopen. Ice piers in foreground 

 and outer breakwater at left ; old breakwater close inshore at right 

 (U.S. Army Engineer District, Philadelphia— in press, 1974). 



(1) Construction. 



(a) Period. 1828-1901. 



(b) Type. Rock mound (Fig. 24). 



(c) Purpose. Protection of anchorage areas (Breakwater Harbor inside inner 

 breakwater; National Harbor of Refuge inside outer breakwater). 



(2) Owner. Department of the Army, U.S. Army Engineer District, Philadelphia, 

 Philadelphia, Pennsylvania 19106. 



(3) Location (approximate). Mouth of Delaware Bay, Cape Henlopen, Delaware. 



Latitude: 38°49'N. - Longitude: 75°06'W. 



(4) Physical Environment. 



(a) Protected Ocean-Estuarine Environment. Protected through southwest 

 quadrant by proximity to shore. Except for some protection from waves offered by the tip 

 of Cape Henlopen, fully exposed to the Atlantic to east and northeast, and to full reach of 

 the Delaware Bay to north and northwest (Fig. 25). 



(b) Wave Conditions. Heavy seas and swells mainly from the east, reportedly 

 with overtopping occurring during storms. 



(c) Currents. Generally east-west tidal current, ranging to about 1 knot in each 

 direction. 



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