C201 Emergency Flood Plan-C201Know what's
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50'25'50'0
GRAPHIC SCALE
( IN FEET )
1" = 50 FT
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EXISTING CONTOUR
EXISTING SANITARY SEWER
EXISTING STORM SEWER
PROPOSED GRADE
PROPOSED CONTOUR
PROPOSED SANITARY SEWER
PROPOSED STORM SEWER
PROPOSED WATER LINE
PROPOSED SWALE
PROPOSED 5' SIDEWALK (BY HOME BUILDER)
(DEVELOPER SHALL INSTALL SIDEWALKS ALONG ALL
COMMON AREAS)
»ADA RAMP TO BE INSTALLED
DENOTES REAR FLOOD PROTECTION GRADE
(SEE SHEET C201 FOR FLOOD PROTECTION NOTES)
LOT NUMBER
PAD ELEVATION
DENOTES FRONT FLOOD PROTECTION GRADE
(SEE SHEET C201 FOR FLOOD PROTECTION NOTES)
PROPOSDED 6" UNDERDRAINS
MINIMUM FINISH FLOOR ELEVATION IS BASED OFF OF
THE BELOW
1. (1') ABOVE THE NEAREST UPSTREAM OR
DOWNSTREAM SANITARY MANHOLE, WHICHEVER
IS LOWEST.
2. 6" (0.5') ABOVE THE MLAG
MINIMUM LOWEST ADJACENT GRADE (FLOOD
PROTECTION)
870
848.0
870
W
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757.5
25
XXX.X
XXX.X
VEGETATIVE COVER
EXISTING SITE CONSIST
MOSTLY OF GRASS AND WEEDS
WITH WOODS ON THE SITE.
ADJACENT PROPERTIES
NORTH: GRASS & WEEDS
EAST: RESIDENTIAL
SOUTH: RESIDENTIAL
WEST: RESIDENTIAL
FLOOD STATEMENT
A PORTION OF THIS SITE LIES WITHIN A ZONE
"X" (500 YEAR FLOODPLAIN) PER FIRM
18057C0235F DATED FEB. 19, 2003. HOWEVER,
NO PORTION OF THIS SITE LIES WITHIN A
ZONE A.
BASED ON THE FEMA BASE FLOOD
ELEVATION FOR THIS AREA, THERE WILL BE
NO POTENTIAL FLOODING OF THIS PROPERTY
VIA OUTFALL OR STORM PIPING SYSTEMS.
EMERGENCY FLOOD ROUTING
EMERGENCY OVERFLOW PONDING
(FOR 100 YEAR STORM ASSUMING ALL INLETS ARE
COMPLETELY CLOGGED.)
Minimum Flood Protection Grades
From Sections 104.02, 302.06 and 303.07 of the City of Carmel Storm
Water Technical Standards Manual
1. Definitions
a.Minimum Flood Protection Grade of all structures fronting a
pond or open ditch shall be no less than 2 feet above any
adjacent 100-year local or regional flood elevations,
whichever is greater, for all windows, doors, pipe entrances,
window wells, and any other structure member where
floodwaters can enter a building.
b.Lowest Adjacent Grade is the elevation of the lowest grade
adjacent to a structure, where the soil meets the
foundation around the outside of the structure (including
structural members such as basement walkout, patios,
decks, porches, support posts or piers, and rim of the
window well.
2. Standard: Lowest Adjacent Grade
a.General
i.The Lowest Adjacent Grade for residential, commercial,
or industrial buildings shall have two feet of freeboard
above the flooding source's 100-year flood elevation
under proposed conditions.
b.For areas outside a Special Flood Hazards Area (SFHA) or
FEMA or IDNR designated floodplain
i.The Lowest Adjacent Grade for all residential,
commercial, or industrial buildings adjacent to ponds
shall be set a minimum of 2 feet above the 100-year
pond elevation or 2 feet above the emergency overflow
weir elevation, whichever is higher.
ii.The Lowest Adjacent Grade for all residential,
commercial, or industrial buildings shall be set a
minimum of 2 feet above the highest noted overflow
path/ponding elevation across the property frontage.
iii.In addition to the Lowest Adjacent Grade requirements,
any basement floor must be at least a foot above
the normal water level of any wet-bottom pond.
3. Design Notes:
a. Each lot that is adjacent to a pond, open ditch or flooding
source has a flood protection grade. There are instances
where there are multiple different flooding sources for 1
structure. In this case, there should be a flood protection
grade listed for each side of the structure in the event that
piping from the structure discharge to either flood source.
b. Finished floor elevation or the lowest building entry elevation
shall be no less than 6 inches above finished grade around
the building. Also, the building's lowest entry elevation that
is adjacent to and facing a road shall be a minimum of 15
inches above the road elevation.
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