[Code of Federal Regulations] [Title 18, Volume 2] [Revised as of January 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 18CFR415.2] [Page 28-30] TITLE 18--CONSERVATION OF POWER AND WATER RESOURCES CHAPTER III--DELAWARE RIVER BASIN COMMISSION PART 415_BASIN REGULATIONS_FLOOD PLAIN REGULATIONS--Table of Contents Sec. 415.2 Definitions. For the purposes of this part, except as otherwise required by the context: Project means the same word as defined by section 1.2(g) of the Delaware River Basin Compact. Floodway means the channel of the watercourse and those portions of the adjoining flood plains which are reasonably required to carry and discharge the regulatory flood. For this purpose the limit of the floodway shall be established by allowing not more than a one-foot rise of the water surface elevation of the regulatory flood as a result of encroachment. Wherever practical, equal conveyance reduction from each side of the flood plain shall be used. (See Figure 1.) [[Page 29]] [GRAPHIC] [TIFF OMITTED] TC05OC91.022 Flood fringe means that portion of the flood hazard area outside the floodway. Flood hazard area means the area inundated by the regulatory flood. Flood plain means the area adjoining the channel of a stream which has been or hereafter may be covered by flood water. [[Page 30]] Floodproofing means any combination of structural and nonstructural additions, changes, or adjustments to properties and structures which reduce or eliminate flood damage to lands, water and sanitary facilities, structures, and contents of buildings. Flood protection elevation means one foot above the elevation of the flood that has a one percent chance of occurring in any one year. (The 100-year flood). Major tributary means the mainstem of the following streams: Pennsylvania Brandywine Creek, Brodhead Creek, Big Bushkill Creek, Lackawaxen, Lehigh, Schuylkill, Neshaminy. Delaware Brandywine Creek, Christina. New York East Branch, Mongaup, Neversink, West Branch. New Jersey Assunpink, Musconetcong, Paulins Kill, Rancocas, Pequest. Official flood plain map means a map showing the flood plain area of a community prepared pursuant to the National Flood Insurance Act, or a map recognized by the Executive Director as meeting equivalent hydraulic or engineering criteria. Regulatory flood means the flood which has a one percent chance of occurring in any one year. (The 100-year flood.) Structure means any assembly of material above or below the surface of land or water, including but not limited to, buildings, dams, fills, levees, bulkheads, dikes, jetties, embankments, causeways, culverts, roads, railroads and bridges.