This Part 6, in conjunction with the Uniform Construction Code, provide minimum requirements for development located in flood hazard areas, including the subdivision of land and other developments; site improvements and installation of utilities; placement and replacement of manufactured homes; placement of recreational vehicles; new construction and alterations, repair, reconstruction, rehabilitation or additions of existing buildings and structures; substantial improvement of existing buildings and structures, including repair of substantial damage; installation of tanks; temporary structures and temporary or permanent storage; utility and miscellaneous Group U buildings and structures; and certain building work exempt from permit under the Uniform Construction Code; and other buildings and development activities.
The Township of West Windsor was accepted for participation
in the National Flood Insurance Program on May 1, 1984. The National
Flood Insurance Program (NFIP) floodplain management regulations encourage
that all federal, state, and local regulations that are more stringent
than the minimum NFIP standards take precedence in permitting decisions.
The FHACA requires that the effective Flood Insurance Rate Map, most
recent preliminary FEMA mapping and flood studies, and Department
delineations be compared to determine the most restrictive mapping.
The FHACA also regulates unstudied flood hazard areas in watersheds
measuring 50 acres or greater in size and most riparian zones in New
Jersey. Because of these higher standards, the regulated flood hazard
area in New Jersey may be more expansive and more restrictive than
the FEMA special flood hazard area. Maps and studies that establish
flood hazard areas are on file at the Division of Land Use, Department
of Community Development located at #271 Clarksville Road, West Windsor,
New Jersey. The following sources identify flood hazard areas in this
jurisdiction and must be considered when determining the best available
flood hazard data area:
A.
Effective flood insurance study. special flood hazard areas (SFHAs)
identified by the Federal Emergency Management Agency in a scientific
and engineering report entitled "Flood Insurance Study, Mercer County,
New Jersey (All Jurisdictions)," consisting of three volumes each
with an effective date of July 20, 2016, and the accompanying Flood
Insurance Rate Maps (FIRM) identified in Table 200-283A, whose effective
date is July 20, 2016, are hereby adopted by reference.
|
Table 200-283A
| |||||
|---|---|---|---|---|---|
|
Map Panel No.
|
Effective Date
|
Suffix
|
Map Panel No.
|
Effective Date
|
Suffix
|
|
34021C0133
|
20-Jul-16
|
F
|
34021C0154
|
20-Jul-16
|
F
|
|
34021C0134
|
20-Jul-16
|
F
|
34021C0161
|
20-Jul-16
|
F
|
|
34021C0141
|
20-Jul-16
|
F
|
34021C0162
|
20-Jul-16
|
F
|
|
34021C0142
|
20-Jul-16
|
F
|
34021C0163
|
20-Jul-16
|
F
|
|
34021C0143
|
20-Jul-16
|
F
|
34021C0164
|
20-Jul-16
|
F
|
|
34021C0144
|
20-Jul-16
|
F
|
34021C0232
|
20-Jul-16
|
F
|
|
34021C0153
|
20-Jul-16
|
F
|
34021C0251
|
20-Jul-16
|
F
|
B.
Federal best available information. Federal best available studies issued after the date of this Part 6 must also be considered. The Township of West Windsor shall utilize federal flood information that provides more detailed hazard information, higher flood elevations, larger flood hazard areas, and results in more restrictive regulations. This information may include, but is not limited to, preliminary flood elevation guidance from FEMA (such as advisory flood hazard area maps, work maps or preliminary FIS and FIRM). These studies, if and when available, are listed on FEMA's Map Service Center website. This information shall be used for floodplain regulation purposes only.
C.
Other best available data. The Township of West Windsor shall utilize high water elevations from flood events, groundwater flooding areas, studies by federal or state agencies, or other information deemed appropriate by the Township of West Windsor. Other "best available information" may not be used which results in less restrictive flood elevations, design standards, or smaller flood hazard areas than the sources described in § 200-283A and B above. This information shall be used for floodplain regulation purposes only.
D.
State-regulated flood hazard areas. For state-regulated waters, the NJ Department of Environmental Protection (NJDEP) identifies the flood hazard area as the land, and the space above that land, which lies below the "Flood Hazard Area Control Act design flood elevation," as defined in § 200-281, and as described in the New Jersey Flood Hazard Area Control Act at N.J.A.C. 7:13. A FHACA flood hazard area exists along every regulated water that has a drainage area of 50 acres or greater. Such area may extend beyond the boundaries of the special flood hazard areas (SFHAs) as identified by FEMA. The following is a list of New Jersey State studied waters in this community under the FHACA, and their respective map identification numbers.
|
Table 200-283D List of State-Studied Waters
| ||
|---|---|---|
|
Name of Studied Waters
|
File Name
|
Map Number(s)
|
|
Assunpink Creek
|
ACI&II04
|
A-4
|
|
Miry Run
|
ACI&II07
|
M-2
|
|
Miry Run
|
ACI&II08
|
M-3
|
|
Shipetaukin Creek
|
ACI&II14
|
SH-1
|
|
Sand Run
|
ACI&II19
|
SA-1
|
|
Assunpink Creek
|
ACIII001
|
A5
|
|
Assunpink Creek
|
ACIII002
|
A6
|
|
Assunpink Creek
|
ACIII003
|
A7
|
|
Bridegroom Run
|
ACIII006
|
BR1
|
|
Stony Brook
|
H0000036
|
10
|
|
Stony Brook
|
H0000037
|
8
|
|
Stony Brook
|
H0000038
|
9
|
|
Stony Brook
|
H0000039
|
7
|
|
Stony Brook
|
H0000040
|
6
|
|
Stony Brook
|
H0000041
|
5
|
|
Millstone River, Stony Brook, Carnegie Lake
|
H0000042
|
4
|
|
Millstone River
|
H0000058
|
1
|
|
Cranbury Brook
|
H0000064
|
21
|
|
Millstone
|
H0000078
|
7
|
|
Millstone River
|
H0000079
|
6
|
|
Millstone River
|
H0000080
|
5
|
|
Millstone River, Cranbury Brook, Big Bear Brook
|
H0000081
|
4
|
|
Millstone River, Devils Brook, Little Bear Brook
|
H0000082
|
3
|
|
Millstone River
|
H0000083
|
2
|
|
Big Bear Brook, Bear Creek
|
H0000217
|
26
|
|
Big Bear Brook
|
H0000218
|
25
|
|
Canoe Brook, Big Bear Brook
|
H0000219
|
24
|
|
Canoe Brook
|
H0000220
|
23
|
|
Assunpink Creek, Bridegroom Run
|
H0000221
|
22
|
|
Assunpink Creek
|
H0000222
|
21
|
|
Bridegroom Run, Assunpink Creek
|
H0000223
|
20
|
|
Assunpink Creek
|
H0000224
|
19
|
|
Little Bear Brook
|
H0000225
|
18
|
|
Little Bear Brook
|
H0000226
|
17
|
|
Duck Pond Run
|
H0000227
|
16
|
|
Duck Pond Run
|
H0000228
|
15
|
|
Duck Pond Run, Little Bear Brook
|
H0000229
|
14
|
|
Duck Pond Run
|
H0000230
|
13
|
|
Stony Brook
|
H0000231
|
12
|
|
Stony Brook
|
H0000232
|
11
|
|
Stony Brook
|
H0000233
|
10
|
|
Stony Brook
|
H0000234
|
9
|
|
Stony Brook
|
H0000235
|
8
|
|
Stony Brook
|
H0000236
|
7
|
|
Millstone River
|
H0000237
|
6
|
|
Millstone River
|
H0000238
|
5
|
|
Millstone River
|
H0000239
|
4
|
|
Millstone River, Big Bear Brook, Cranbury Brook
|
H0000240
|
3
|
|
Millstone River, Devils Brook, Little Bear Brook
|
H0000241
|
2
|
|
Carnegie Lake, Millstone River
|
H0000242
|
1
|
|
Millstone River
|
H0000243
|
1
|
|
Millstone River
|
H0000244
|
2
|
|
Bear Creek
|
H0000252
|
10
|
|
Big Bear Brook
|
H0000253
|
11
|
|
Millstone River
|
H0000153p
|
01P
|
|
Millstone River
|
H0000154p
|
02P
|
|
Millstone River
|
H0000155p
|
03P
|
|
Millstone River
|
H0000156p
|
04P
|
|
Cranbury Brook
|
H0000162p
|
10P
|
|
Millstone River
|
H0000255p
|
01P
|
|
Millstone River
|
H0000256p
|
02P
|
|
Millstone River
|
H0000257p
|
03P
|
|
Big Bear Brook
|
H0000258p
|
04P
|
|
Big Bear Brook
|
H0000259p
|
05P
|
|
Bear Creek
|
H0000260p
|
06P
|
|
Canoe Brook
|
H0000261p
|
07PR
|
|
Canoe Brook
|
H0000262p
|
08P
|
|
Little Bear Brook
|
H0000263p
|
09P
|
|
Duck Pond Run
|
H0000264p
|
10P
|
|
Duck Pond Run
|
H0000265p
|
11PR
|
|
Assunpink Creek
|
H0000268p
|
14P
|
|
Assunpink Creek
|
H0000269p
|
15P
|
|
Bridegroom Run
|
H0000270p
|
16P
|
|
Millstone River
|
H0000271p
|
01P
|
|
Bear Creek
|
H0000278p
|
08p
|
The local design flood elevation (LDFE) is established in the flood hazard areas determined in § 200-283, above, using the best available flood hazard data sources, and the Flood Hazard Area Control Act minimum statewide elevation requirements for lowest floors in A Zones, ASCE 24 requirements for critical facilities as specified by the Building Code, plus additional freeboard as specified by this Part 6. At a minimum, the local design flood elevation shall be as follows:
A.
For a delineated watercourse, the elevation associated with the best available flood hazard data area determined in § 200-283 above, plus one foot or as described by N.J.A.C. 7:13 of freeboard; or
B.
For any undelineated watercourse (where mapping or studies described in § 200-283A and B above are not available) that has a contributory drainage area of 50 acres or more, the applicants must provide one of the following to determine the local design flood elevation:
(1)
A copy of an unexpired NJDEP flood hazard area verification,
plus one foot of freeboard and any additional freeboard as required
by ASCE 24; or
(2)
A determination of the flood hazard area design flood elevation using Method 5 or Method 6 (as described in N.J.A.C. 7:13), plus one foot of freeboard and any additional freeboard as required by ASCE 24. Any determination using these methods must be sealed and submitted according to §§ 200-306 and 200-307.
C.
AO Zones. For Zone AO areas on the municipality's FIRM (or on preliminary
flood elevation guidance from FEMA), the local design flood elevation
is determined from the FIRM panel as the highest adjacent grade plus
the depth number specified plus one foot of freeboard. If no depth
number is specified, the local design flood elevation is three feet
above the highest adjacent grade.
D.
Class IV critical facilities. For any proposed development of new
and substantially improved flood design Class IV critical facilities,
the local design flood elevation must be the higher of the 0.2% annual
chance (500-year) flood elevation or the flood hazard area design
flood elevation with an additional two feet of freeboard in accordance
with ASCE 24.
E.
Class III critical facilities. For proposed development of new and
substantially improved flood design Class III critical facilities
in coastal high hazard areas, the local design flood elevation must
be the higher of the 0.2% annual chance (500-year) flood elevation
or the flood hazard area design flood elevation with an additional
one foot of freeboard in accordance with ASCE 24.
