[Code of Federal Regulations]

[Title 33, Volume 3]

[Revised as of July 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 33CFR238.4]



[Page 326-327]

 

                TITLE 33--NAVIGATION AND NAVIGABLE WATERS

 

 CHAPTER II--CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY, DEPARTMENT OF 

                                 DEFENSE

 

PART 238_WATER RESOURCES POLICIES AND AUTHORITIES: FLOOD DAMAGE REDUCTION 

MEASURES IN URBAN AREAS--Table of Contents

 

Sec.  238.4  Definitions.



    For purposes of this regulation the following definitions apply:

    (a) Urban areas are cities, towns, or other incorporated or 

unincorporated political subdivisions of States that:

    (1) Provide general local government for specific population 

concentrations, and,

    (2) Occupy an essentially continuous area of developed land, 

containing such structures as residences, public and commercial 

buildings, and industrial sites.

    (b) Flood damage reduction works in urban areas are the adjustments 

in land use and the facilities (structural and non-structural) designed 

to reduce flood damages in urban areas from overflow or backwater due to 

major storms and snowmelt. They include structural and other engineering 

modifications to natural streams or to previously modified natural 

waterways. Flood damage reduction works are designed to modify flood 

behavior typified by temporary conditions of inundation of normally dry 

land from the



[[Page 327]]



overflow of rivers and streams or from abnormally high coastal waters 

due to sever storms.

    (c) Storm sewer systems are the facilities in urban areas designed 

to collect and convey runoff from rainfall or snowmelt in the urban area 

to natural water courses or to previously modified natural waterways. 

They include storm drains, inlets, manholes, pipes, culverts, conduits, 

sewers and sewer appurtenances, on-site storage and detention basins, 

curbs and gutters, and other small drainageways that remove or help to 

manage runoff in urban areas. Storm sewer systems are designed to solve 

storm drainage problems, which are typified by excessive accumulation of 

runoff in depressions; overland sheet flow resulting from rapid snowmelt 

or rainfall; and excessive accumulation of water at the facilities 

listed in this paragraph because of their limited capacity.