justified by evaluated benefits, and further found the nature and amount 
of benefits warrant Federal participation. They recommended adoption of 
projects by the United States authorizing, subject to certain conditions, 
Federal participation by the contribution of Federal funds in an amount 
equal to one-third of the first costs and periodic nourishment costs for 
a period of 10 years of protecting the public shores of the two keys. 
The Beach Erosion Board noted that the existing beaches at Virginia 
Key and Key Biscayne appear adequate in width to provide protection to 
backshore improvements under moderate storm conditions. Considering 
presently unused frontage and area landward of the beach, there appears 
to be sufficient area for recreational needs for many years. In view of 
these conditions the Board felt there is no justification for Federal 
participation in the cost of widening the beach in the near future. 
However, the Board believed that stabilization of the shores is desirable 
to prevent future beach losses, and that such stabilization can be accom- 
plished by periodic nourishment with suitable sand as required. The Board 
recommended adoption of projects by the United States authorizing Federal 
participation by the contribution of Federal funds in amount of one-third 
of the costs of periodic nourishment of the shores at Virginia and Biscayne 
Keys, Florida. The plans comprise periodic nourishment of 1.8 miles of 
beach on Virginia Key and 1.9 miles of beach on Key Biscayne. The plans 
also include three groins on Virginia Key and one groin on Key Biscayne 
for deferred construction when experience indicates their justification. 
The Board recommended Federal participation in the costs of such periodic 
nourishment of the beach for an initial period of 10 years. The Board 
further recommended that protective measures which may be undertaken by 
local interests for the privately owned portion of the Key Biscayne shore, 
based on their own determination of economic justification, be accomplished 
generally in accordance with the method developed by the District Engineer. 
The Chief of Engineers concurred generally in the findings of the 
Board and accordingly, recommended adoption of projects providing for 
Federal participation in the cost of periodic nourishment of 1.8 miles of 
beach on Virginia Key and 1.9 miles of beach on Key Biscayne for an initial 
period of 10 years, and in the cost of deferred construction of groins when 
experience indicates their justification, in accordance with the plans pro- 
posed by the Beach Erosion Board, 
SAN_JUAN, PUERTO RICO 
The purpose of the investigation was to determine methods of prevent- 
ing further erosion and stabilizing or restoring the beach, with special 
emphasis on protecting existing upland properties and future recreational, 
industrial or residential areas, and on reclaiming some eroded land at 
various locations, The study area comprises the Atlantic Ocean shore of 
Puerto Rico between Punta Salinas and Punta Vacia Talega. The total length 
84 
