FLOOD03186

• County: Statewide
• Community: All
• Stream Name: All
• Basin: Statewide
• Title: Benefit-Cost Analysis of Hazard Mitigation Projects
• Date: 1/1/1996
• Prepared For: FEMA
• Prepared By: FEMA
• Floodplain - Doc Type: Educational/Technical/Reference Information

VERSION 1.0 1/12/95

B-C PROGRAM: Level One Anaiysis

BUILDiNG
INFORMATION

Zero Flood Depth
Elevation

Number of
Stories Above
Grade

Construction
Date

Chapter 8, Benefit-Cost Program: Level Two Analysis, page 8-2,
for information about entering building-specific depth-damage functions.
If Other is selected for building type, no default depth-damage functions
can be provided for a LEVEL ONE analysis and a LEVEL TWO
analysis MUST be conducted for the Building Depth-Damage
Function AND for the Contents Depth-Damage Function.

This section contains entries for the Zero Flood Depth Elevation and
three descriptive categories for the building.

.-.tiltll

GREEN Block (Data Input). The Zero Flood Depth Elevation, as
defined by the Federal Insurance Administration, is the elevation in feet
of the top of the finished flooring of the lowest finished floor.

The Zero Flood Depth Eievation of the building under evaluation is
particularly important because it markedly affects the degree of flood
risk for the building, and thus markedly affects the benefits of avoiding
future flood damages.

Zero Flood Depth Elevations can be obtained from surveying data if
available, or may be estimated from observed flood data. For example,
if the flood was known to have had an elevation of 463 feet in a
neighborhood and the flood depth in a building was 4.5 feet above the
Zero Flood Depth Elevation, then the Zero Flood Depth Eievatlon
for the building (i.e., the elevation of the top of the finished flooring of
the lowest finished floor) must be 458.5 feet.

PINK Biock (Information Oniy). The Number of Stories Above
Grade may affect engineering judgment about the building's
vulnerability to flood damage. Taller buildings will have lower
percentages of flood damage at a given flood depth because only the
lower story or stories will be directly affected by flood waters.

PINK Block (Information Only). The Construction Date is included
to provide guidance about the building's vulnerability to flood damage
because construction practices change with time. In the absence of
more detailed information, knowing the construction date may help a
knowledgeable engineer to make informed judgements about probable
construction materials and details which may be relevant to a building's
depth-damage function.

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