norfolk county, massachusetts (all jurisdictions)

Transcription

NORFOLK COUNTY,
MASSACHUSETTS
(ALL JURISDICTIONS)
Volume 4 of 4
COMMUNITY NAME
COMMUNITY NUMBER
AVON, TOWN OF
250231
BELLINGHAM, TOWN OF
250232
BRAINTREE, TOWN OF
250233
BROOKLINE, TOWN OF
250234
CANTON, TOWN OF^
250235
COHASSET, TOWN OF
250236
DEDHAM, TOWN OF
250237
DOVER, TOWN OF
250238
FOXBOROUGH, TOWN OF
250239
FRANKLIN, TOWN OF
250240
HOLBROOK, TOWN OF
255212
MEDFIELD, TOWN OF
250242
MEDWAY, TOWN OF
250243
MILLIS, TOWN OF
250244
MILTON, TOWN OF
250245
NEEDHAM, TOWN OF
255215
NORFOLK, TOWN OF
255217
NORWOOD, TOWN OF
250248
PLAINVILLE, TOWN OF
250249
QUINCY, CITY OF
255219
RANDOLPH, TOWN OF
250251
SHARON, TOWN OF
250252
STOUGHTON, TOWN OF
250253
WALPOLE, TOWN OF
250254
WELLESLEY, TOWN OF
250255
WESTWOOD, TOWN OF
255225
WEYMOUTH, TOWN OF
250257
WRENTHAM, TOWN OF
250258
*The Town of Canton is not included in the partial countywide Flood Insurance Study; please refer to the separately published FIS, FIRM and FBFM
Norfolk County
PRELIMINARY
OCTOBER 15, 2012
Federal Emergency Management Agency
FLOOD INSURANCE STUDY NUMBER
25021CV004B
NOTICE TO
FLOOD INSURANCE STUDY USERS
Communities participating in the National Flood Insurance Program have established repositories of
flood hazard data for floodplain management and flood insurance purposes. This Flood Insurance
Study (FIS) may not contain all data available within the repository. It is advisable to contact the
community repository for any additional data.
The Federal Emergency Management Agency (FEMA) may revise and republish part or all of
this Preliminary FIS report at any time. In addition, FEMA may revise part of this FIS report by
the Letter of Map Revision (LOMR) process, which does not involve republication or
redistribution of the FIS report. Therefore, users should consult community officials and check
the Community Map Repository to obtain the most current FIS components.
Initial Countywide FIS Effective Date: July 17, 2012
Revised Countywide FIS Date:
i
TABLE OF CONTENTS – VOLUME 1
Page
1.0
2.0
3.0
INTRODUCTION
1
1.1
Purpose of Study
1
1.2
Authority and Acknowledgments
1
1.3
Coordination
8
AREA STUDIED
9
2.1
Scope of Study
9
2.2
Community Description
24
2.3
Principal Flood Problems
24
2.4
Flood Protection Measures
38
ENGINEERING METHODS
44
3.1
Riverine Hydrologic Analyses
44
3.2
Hydraulic Analyses
85
3.3
Coastal Hydrologic Analyses
101
3.4
Coastal Hydraulic Analyses
105
3.5
Vertical Datum
121
TABLES
Table 1 – Initial, Intermediate, and Final CCO Meetings
8
Table 2 – Flooding Sources Studied by Detailed Methods
10
Table 3 – Flooding Sources Studied by Approximate Methods
20
Table 4 – Letters of Map Change
23
Table 5 – Gage Data for the Boston/Braintree Area
25
Table 6 – Tidal Data for the Boston/Braintree Area
26
Table 7 – Peak Discharges and Maximum Elevations, Dedham, MA
30
Table 8 – Maximum Elevations for the Neponset River, Dedham, MA
31
Table 9 – Historical Flood Levels on Charles River, Needham, MA
36
Table 10 – Historical Flood Levels on Fuller Brook, Needham, MA
36
ii
TABLE OF CONTENTS – VOLUME 1 – continued
TABLES - continued
Page
Table 11 – Summary of Discharges
56
Table 12 – Manning’s “n” Values
96
Table 13 – Summary of Stillwater Elevations
100
Table 14 – Summary of Coastal Stillwater Elevations
102
Table 15 – Summary of Coastal Stillwater Elevations - Quincy
104
Table 16 – Revised Transect Descriptions
106
Table 17 – Revised Transect Data Stillwater Elevations
111
Table 18 – Revised Transect Data Stillwater Elevations - Quincy
119
FIGURES
Figure 1 – Transect Schematic
117
Figure 2 – Transect Location Map
118
iii
Page
4.0
FLOODPLAIN MANAGEMENT APPLICATIONS
123
4.1
Floodplain Boundaries
123
4.2
Floodways
126
5.0
INSURANCE APPLICATION
232
6.0
FLOOD INSURANCE RATE MAP
233
7.0
OTHER STUDIES
237
8.0
LOCATION OF DATA
237
9.0
BIBLIOGRAPHY AND REFERENCES
237
TABLES
Table 19 – Floodway Data Table
129
Table 20 – Community Map History
234
FIGURES
Figure 3 – Floodway Schematic
128
iv
EXHIBITS
Exhibit 1 - Flood Profiles
Arnolds Brook
Beaver Brook (Town of Avon)
Beaver Brook (Town of Bellingham)
Beaver Brook (Town of Holbrook)
Beaver Brook (Town of Sharon)
Beaver Meadow Brook
Billings Brook
Billings Brook Branch
Bogastow Brook
Brook A (Stetson Brook)
Brook B
Brook No. 1
Bubbling Brook
Buckmaster Brook
Bungay Brook
Burnt Swamp Brook
Canoe River (Town of Foxborough)
Canoe River (Town of Sharon)
Canton River
Caroline Brook
Charles River (Lower Reach)
Charles River (Upper Reach)
Chicken Brook
Cobb’s Brook
Cochato River/Trout Brook
Cress Brook
Crocker Brook
Cunningham Brook
Diamond Brook
Dorcester Brook
Farm River
Fuller Brook
Furnace Brook
Germany Brook
Glovers Brook
Harlow Pond Lateral
Hawes Brook
Hawthorne Brook
Herring Brook
Hopping Brook
James Brook
Lily Pond Stream
Panel
Panels
Panels
Panels
Panel
Panel
Panel
Panel
Panels
Panel
Panel
Panels
Panels
Panel
Panels
Panels
Panels
Panel
Panels
Panels
Panels
Panels
Panels
Panels
Panels
Panels
Panel
Panel
Panels
Panel
Panels
Panels
Panels
Panels
Panels
Panel
Panels
Panel
Panel
Panels
Panel
Panel
v
01P
02P-03P
04P-05P
06P-07P
08P
09P
10P
11P
12P-17P
18P
19P
20P-21P
22P-24P
25P
26P-27P
28P-29P
30P-31P
32P
33P-35P
36P
37P-46P
47P-59P
60P-63P
64P-65P
66P-71P
72P-73P
74P
75P
76P-77P
78P
79P-81P
82P
83P-85P
86P-88P
89P-90P
91P
92P-93P
94P
95P
96P-97P
98P
99P
TABLE OF CONTENTS – VOLUME 3 - continued
EXHIBITS – continued
Exhibit 1 – Flood Profiles – continued
Mann Pond Lateral
Martin Brook
Mary Lee Brook
Massapoag Brook (Town of Canton)
Massapoag Brook (Town of Sharon)
Meadow Brook
Mill Brook
Mill River (Town of Norfolk)
Mill River (Town of Weymouth)
Mill River Tributary A
Mill River Tributary B
Miller Brook
Panel
Panels
Panel
Panels
Panels
Panel
Panels
Panels
Panels
Panel
Panel
Panel
100P
101P-102P
103P
104P-105P
106P-107P
108P
109P-111P
112P-113P
114P-115P
116P
117P
118P
Mine Brook (Town of Franklin)
Mine Brook (Town of Walpole)
Monatiquot River
Mother Brook
Myrtle Street Lateral
Neponset River
Norroway Brook
Old Swamp River
Pequid Brook (Lower Reach)
Pequid Brook (Upper Reach)
Peters River
Pickerel Brook
Pine Tree Brook
Plantingfield Brook
Ponkapoag Brook
Prison Farm Lateral
Purgatory Brook
Rabbit Hill Brook
Rattlesnake Run
Redwing Brook
Panels
Panels
Panels
Panels
Panel
Panels
Panels
Panels
Panel
Panel
Panels
Panel
Panels
Panels
Panels
Panels
Panels
Panels
Panel
Panel
vi
119P-127P
128P-129P
130P-135P
136P-138P
139P
140P-150P
151P-152P
153P-155P
156P
157P
158P-162P
163P
164P-166P
167P-168P
169P-171P
172P-173P
174P-177P
178P-179P
180P
181P
TABLE OF CONTENTS – VOLUME 4 - continued
Richardsons Brook
Robinson Brook
Rock Meadow Brook
Rocky Brook
Rumford River
School Meadow Brook
Shepards Brook
South Brook
Steep Hill Brook
Stony Brook
Stop River
Sucker Brook
Ten Mile River
Town Brook
Traphole Brook
Tributary C2B
Tributary R2
Tributary R3
Tributary R4
Tributary to Great Black Swamp
Tributary to Steep Hill Brook
Trout Brook (Town of Avon)
Trout Brook (Town of Dover)
Turkey Hill Run
Turtle Brook
Unnamed Tributary to Mary Lee Brook
Unnamed Tributary to Robinson Brook
Vine Brook
Waban Brook
Walnut Hill Stream
Whiting Pond Bypass
Exhibit 2 -
Flood Insurance Rate Map Index
Flood Insurance Rate Map
vii
Panel
Panels
Panels
Panel
Panels
Panels
Panel
Panel
Panels
Panels
Panels
Panel
Panels
Panels
Panels
Panel
Panel
Panel
Panel
Panel
Panel
Panel
Panels
Panel
Panels
Panel
Panel
Panels
Panel
Panel
Panel
182P
183P-185P
186P-189P
190P
191P-192P
193P-194P
195P
196P
197P-198P
199P-201P
202P-206P
207P
208P-209P
210P-214P
215P-216P
217P
218P
219P
220P
221P
222P
223P
224P-226P
227P
228P-229P
230P
231P
232P-233P
234P
235P
236P
119P
120P
121P
122P
123P
124P
125P
126P
SPRING POND
127P
128P
129P
130P
131P
132P
133P
134P
135P
136P
137P
138P
139P
50
FLOODING AFFECTING THE TOWN OF MILTON
40
GRANITE AVENUE
30
20
10
10
0
0
LEGEND
0.2% ANNUAL CHANCE FLOOD
1% ANNUAL CHANCE FLOOD
-10
*STREAM BED
CROSS SECTION LOCATION
-20
3000
4000
5000
6000
7000
8000
9000
10000
STREAM DISTANCE IN FEET ABOVE ROUTE 3A
11000
12000
13000
14000
*DATA NOT AVAILABLE
15000
(ALL JURISDICTIONS)
20
SUFFOLK COUNTY, MA
NORFOLK
30
FEDERAL EMERGENCY MANAGEMENT AGENCY
ELEVATION IN FEET (NAVD 88)
40
NEPONSET RIVER
60
ADAMS STREET
RAILROAD
NEPONSET RIVER
RESERVATION
TOWN OF MILTON
AREA NOT INCLUDED
TOWN OF MILTON
NEPONSET RIVER
RESERVATION
50
SUFFOLK COUNTY
CITY OF BOSTON
NORFOLK COUNTY
TOWN OF MILTON
60
INTERSTATE HIGHWAY 93
1% BACKWATER EFFECT FROM BOSTON HARBOR
70
1% BACKWATER EFFECT
FROM BOSTON HARBOR
FLOOD PROFILES
70
140P
137P
()'
)'
)'
)'
%
$
"!#
NORFOLK
%
'%"&!
! !
&
%
141P
GLENWOOD AVENUE FOOTBRIDGE
50
50
40
40
30
30
20
20
LEGEND
10
STREAM BED
0
27000
28000
29000
30000
31000
32000
33000
34000
35000
36000
37000
38000
39000
40000
NEPONSET RIVER
60
(ALL JURISDICTIONS)
60
SUFFOLK COUNTY, MA
NORFOLK
70
FLOOD PROFILES
RAILROAD
CONFLUENCE OF MOTHER BROOK
DANA AVENUE
RAILROAD
80
70
RAILROAD
RAILROAD
80
FAIRMONT AVENUE
90
TILESTON AND HOLLINGSWORTH DAM
90
142P
139P
60
60
50
50
40
40
30
30
LEGEND
20
STREAM BED
10
40000
41000
42000
43000
44000
45000
46000
NEPONSET RIVER
70
(ALL JURISDICTIONS)
70
NORFOLK
SUFFOLK COUNTY, MA
80
FLOOD PROFILES
TOWN OF MILTON
TOWN OF CANTON
90
80
TRUMAN HIGHWAY
90
100
NEPONSET VALLEY PARKWAY
100
143P
140P
144P
F
D
B
C
E
G
145P
Q
H
I
J
K
L
M
N
O
R
S
P
146P
AK
AI
AH
T
U
V
W
X
Y
Z
AA
AB
AC
AD
AE
AF
AJ
AL
AM AN
AG
147P
AV
AT
AO
AP
AQ
AR
AU AW
AX
AY
AZ BA
AS
148P
BH
BB
BC
BD BE
BF
BG
BI
149P
BP
BJ
BK
BL
BM
BN
BQ
BO
150P
151P
152P
153P
154P
155P
156P
157P
158P
159P
JENKS RESERVIOR
160P
161P
162P
163P
164P
165P
166P
167P
168P
75
75
1% BACKWATER EFFECT FROM NEPONSET RIVER
60
60
55
55
PONKAPOAG BROOK
65
FLOOD PROFILES
GOLF COURSE DAM
STONE BRIDGE
ELM STREET
70
50
45
45
E
D
F
40
40
LEGEND
35
STREAM BED
A
30
0
500
1000
1500
2000
B
2500
3000
3500
C
4000
STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH NEPONSET RIVER
4500
5000
5500
6000
6500
(ALL
JURISDITIONS
ALLJURISDICTIONS)
50
NORFOLK COUNTY, MA
CULVERT
65
INTERSTATE 95
70
CONFLUENCE WITH
NEPONSET RIVER
AREA NOT INCLUDED
169P
AREA NOT INCLUDED
170P
AREA NOT INCLUDED
AREA NOT INCLUDED
AREA NOT INCLUDED
171P
172P
173P
174P
STREET
175P
176P
177P
178P
179P
35
35
15
15
10
10
5
5
CULVERT
0
0
LEGEND
-5
STREAM BED
A
-10
0
0
B
100
200
C
300
D
400
500
600
STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH STRAITS POND
RATTLESNAKE RUN
20
(ALL JURISDICTIONS)
20
NORFOLK COUNTY, MA
25
FLOOD PROFILES
30
DRIVEWAY
LIMIT OF DETAILED STUDY
25
JERUSALEM ROAD
CONFLUENCE WITH STRAITS POND
30
1% BACKWATER EFFECT FROM STRAITS POND
180P
181P
35
35
15
15
10
5
5
0
0
LEGEND
-5
STREAM BED
A
0
B
C
200
400
600
800
1000
1200
STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH LITTLE HARBOR
(ALL JURISDICTIONS)
10% ANNUAL CHANCE FLOODING ELEVATION DUE TO FRESHWATER RUNOFF
NORFOLK COUNTY, MA
10
-10
RICHARDSONS BROOK
20
FLOOD PROFILES
25
JERUSALEM ROAD
20
30
25
CONFLUENCE WITH
LITTLE HARBOR
30
TIDAL FLOODING FROM MASSACHUSETTS BAY (LITTLE HARBOR)
179P
182P
183P
184P
185P
186P
187P
188P
189P
190P
191P
192P
205
205
WASHINGTON STREET
185
185
180
180
175
175
170
170
LEGEND
165
STREAM BED
A
160
0
500
1000
1500
B
2000
C
2500
D
3000
3500
4000
STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH NEPONSET RIVER
E
4500
5000
5500
SCHOOL MEADOW BROOK
190
ALL JURISDICTIONS
(ALL
JURISDICTIONS)
190
NORFOLK COUNTY, MA
195
FLOOD PROFILES
200
195
ACCESS ROAD
200
CONFLUENCE WITH
NEPONSET RIVER
1% BACKWATER EFFECT FROM NEPONSET RIVER
193P
194P
195P
196P
197P
198P
SHEEHAN STREET
199P
200P
201P
STREAM DISTANCE IN FEET ABOVE CORPORATE LIMITS
202P
HIGHLAND LAKE
203P
204P
205P
206P
207P
208P
209P
210P
211P
212P
213P
214P
215P
216P
217P
218P
219P
220P
221P
222P
223P
224P
225P
155
155
150
150
145
145
140
140
135
135
130
130
125
125
120
120
115
110
226P
227P
228P
229P
230P
UNNAMED
285
280
280
275
275
270
270
265
265
260
260
LEGEND
*0.2% ANNUAL CHANCE FLOOD
*2% ANNUAL CHANCE FLOOD
255
*10% ANNUAL CHANCE FLOOD
STREAM BED
250
0
200
400
600
800
1000
1200
1400
1600
STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH ROBINSON BROOK
1800
2000
2200
2400
*DATA NOT COMPUTED
2600
UNNAMED TRIBUTARY TO ROBINSON BROOK
285
JURISDICTIONS
ALL JURISDICTIONS)
(ALL
290
NORFOLK COUNTY, MA
290
FLOOD PROFILES
295
295
231P
01P
232P
233P
234P
ABANDONED RAILROAD
25
10
5
5
0
0
LEGEND
-5
C
A
-10
0
500
1000
1500
2000
STREAM BED
B
2500
3000
STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH THE GULF
JURISDICTIONS
ALL JURISDICTIONS)
(ALL
10
15
NORFOLK COUNTY, MA
15
20
BEECHWOOD STREET
20
WALNUT HILL STREAM
30
FLOOD PROFILES
MAIN STREET
25
1% BACKWATER EFFECT
FROM THE GULF
CONFLUENCE WITH
THE GULF
30
35
35
234P
235P
236P

norfolk county, massachusetts (all jurisdictions)

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