... recreation areas . In addition to typical features , such as ramps , lower ... Statistical Areas ( SMSA's ) are broadly defined as urban areas which ... recreation resource management The Corps manages approximately 11 million acres of ...

... Statistical Base The Corps manages some 390 lakes and water- ways projects at which the annual visitation exceeds 5,000 recreation days . These projects reported a total annual attendance of approximately 300 million recre- ation days ...

... Statistical Base RECREATION DAYS Attendance at each project is presented in recreation days . A recreation day is defined as " a standard unit of use consisting of a visit by one individual to a recreation de- velopment or area for ...

... RECREATION WASHINGTON 25 , D.C. April 9 , 1963 ( This letter was sent to all State agencies concerned with the ... data is needed to establish and maintain statistics on recreation supply and demand , to provide comparative data and ...

... database that contains recreation , facility , utility , and travel route information was released for national implementation . This database , named Infrastructure , contains information about estimated recreation use by activity ...