High Tide Line--This term means the line or mark left upon tide flats,
beaches, or along shore objects that indicate the intersection of the land with the
water's surface at the maximum height reached by a rising tide. The term includes
spring high tides and other high tides that occur with periodic frequency, but does not
include storm surges.
means the point on a national stream above which
the average annual flow is less than 5
cubic feet per second. For intermittent streams,
the criterion may be the median flow.
That is, the point at which a flow of 5 cubic
foot per second is equaled or exceeded
50 percent of the time.
Structure--This term means, without limitation, any pier, wharf,
dolphin, weir, boom, breakwater, bulkhead, revetment, riprap, jetty, permanent mooring
structure, power transmission line, permanently moored floating vessel, piling, aid to
navigation, or any other obstacle or obstruction.
Dams and Dikes--Either term means an impoundment structure, except a
weir, that completely spans a navigable water of the United States and that may obstruct
inter state waterborne commerce.
Work--This term means any dredging or disposal of dredged material,
excavation, filling, or other modification of a navigable water of the United States.
Dredged Material--This term means any material dredged or excavated
from waters of the United States.
Discharge of Dredged Material--This term includes the addition of
dredged material to a specified discharge site located in waters of the United States,
and runoff from or overflow from a contained land or water disposal area.
Fill Material--This term includes any material used for the primary
purpose of replacing an aquatic area with dryland or of changing the bottom elevation of
any body of water. (The discharge of wastewater is not considered fill material and is
regulated by the NPDES Permit Program.)
Discharge of Fill Material--This term means the addition of any fill
material to waters of the United States. Generally, any fill material required in
connection with construction of facilities in waters of the United States is considered
a discharge of fill material.