18 
BEACH EROSION STUDIES 
The principal types of beach erosion reports of studies at 
specific localities are the following: 
a. Cooperative studies (authorization by the Chief of 
Engineers in accordance with Section 2, River and 
Harbor Act approved on 3 July 1930). 
b. Preliminary examinations and surveys (Congressional 
authorization by reference to locality by name). 
co Reports on shore line changes which may result from 
improvements of the entrance at the mouths of rivers 
and inlets (Section 5, Public Law No. 409, 74th Con- 
gress). 
d. Reports on shore protection of Federal property 
(authorization by the Chief of Engineers). 
Of these types of studies, cooperative beach erosion studies 
are the type most frequently made when a community desires in- 
vestigation of its particular problem. As these studies have, 
consequently, greater general interests, information concerning 
studies of specific localities contained in those quarterly bulletins 
will be confined to cooperative studies. Information about other 
types of studies can be obtained upon inquiry to this office. 
Cooperative studies of beach erosion are studies made by 
the Corps of Engineers in cooperation with appropriate agencies 
of the various States by authority of Section 2 of the River and 
Harbor Act approved on 3 July 1930. By executive ruling the 
cost of these studies is divided equally between the United States 
and the cooperating agency. Information concerning the initiation 
of a cooperative study may be obtained from any District Ingineer 
of the Corps of Engineers. After a report on a cooperative study 
has been transmitted to Congress, a summary thereof will be in- 
cluded in the next issue of this bulletin. Lists of cooperative 
studies completed since the last issue of the Bulletin and those 
now in progress follow: 
COOPERATIVE STUDIES COMPLETED SINCE LAST 
ISSUE OF BULLETIN 
MISSISSIPPI 
HARRISON COUNTY. Completed 16 February 1948. Cooperating Agency: 
Harrison County Board of Supervisors. 
Report has not been transmitted to Congress, but the follow-— 
ing information has been released: "The Beach Erosion Board 
