Federal Emergency Management Agency
FLOOD INSURANCE STUDY NUMBER 39105CV000A
VOLUME 3 OF 8
MIDDLESEX COUNTY, MASSACHUSETTS (ALL JURISDICTIONS)
COMMUNITY NAME COMMUNITY NUMBER ACTON, TOWN OF 250176 ARLINGTON, TOWN OF 250177 Middlesex County ASHBY, TOWN OF 250178 ASHLAND, TOWN OF 250179 AYER, TOWN OF 250180 BEDFORD, TOWN OF 255209 COMMUNITY NAME COMMUNITY NUMBER BELMONT, TOWN OF 250182 MELROSE, CITY OF 250206 BILLERICA, TOWN OF 250183 NATICK, TOWN OF 250207 BOXBOROUGH, TOWN OF 250184 NEWTON, CITY OF 250208 BURLINGTON, TOWN OF 250185 NORTH READING, TOWN OF 250209 CAMBRIDGE, CITY OF 250186 PEPPERELL, TOWN OF 250210 CARLISLE, TOWN OF 250187 READING, TOWN OF 250211 CHELMSFORD, TOWN OF 250188 SHERBORN, TOWN OF 250212 CONCORD, TOWN OF 250189 SHIRLEY, TOWN OF 250213 DRACUT, TOWN OF 250190 SOMERVILLE, CITY OF 250214 DUNSTABLE, TOWN OF 250191 STONEHAM, TOWN OF 250215 EVERETT, CITY OF 250192 STOW, TOWN OF 250216 FRAMINGHAM, TOWN OF 250193 SUDBURY, TOWN OF 250217 GROTON, TOWN OF 250194 TEWKSBURY, TOWN OF 250218 HOLLISTON, TOWN OF 250195 TOWNSEND, TOWN OF 250219 HOPKINTON, TOWN OF 250196 TYNGSBOROUGH, TOWN OF 250220 HUDSON, TOWN OF 250197 WAKEFIELD, TOWN OF 250221 LEXINGTON, TOWN OF 250198 WALTHAM, CITY OF 250222 LINCOLN, TOWN OF 250199 WATERTOWN, TOWN OF 250223 LITTLETON, TOWN OF 250200 WAYLAND, TOWN OF 250224 LOWELL, CITY OF 250201 WESTFORD, TOWN OF 250225 MALDEN, CITY OF 250202 WESTON, TOWN OF 250226 MARLBOROUGH, CITY OF 250203 WILMINGTON, TOWN OF 250227 MAYNARD, TOWN OF 250204 WINCHESTER, TOWN OF 250228 MEDFORD, CITY OF 250205 WOBURN, CITY OF 250229
REVISED: July 6, 2016 Federal Emergency Management Agency
FLOOD INSURANCE STUDY NUMBER 25017CV003C
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.
Part or all of this FIS may be revised and republished at any time. In addition, part of this FIS may be revised by the Letter of Map Revision process, which does not involve republication or redistribution of the FIS. It is, therefore, the responsibility of the user to consult with community officials and to check the community repository to obtain the most current FIS components.
Initial Countywide FIS Effective Date: June 4, 2010
Revised Countywide FIS Date: July 7, 2014
Revised Countywide FIS Date: July 6, 2016
TABLE OF CONTENTS – Volume 1 – July 6, 2016
Page
1.0 INTRODUCTION 1 1.1 Purpose of Study 1 1.2 Authority and Acknowledgments 1 1.3 Coordination 13
2.0 AREA STUDIED 15 2.1 Scope of Study 15 2.2 Community Description 23 2.3 Principal Flood Problems 24 2.4 Flood Protection Measures 29
3.0 ENGINEERING METHODS 35 3.1 Hydrologic Analyses 35 3.2 Hydraulic Analyses 94 3.3 Vertical Datum 106
4.0 FLOODPLAIN MANAGEMENT APPLICATIONS 107 4.1 Floodplain Boundaries 107 4.2 Floodways 109
5.0 INSURANCE APPLICATIONS 112
6.0 FLOOD INSURANCE RATE MAP 112
7.0 OTHER STUDIES 121
8.0 LOCATION OF DATA 121
9.0 BIBLIOGRAPHY AND REFERENCES 122
i
TABLE OF CONTENTS – Volume 1 – continued
FIGURES Page
Figure 1 – Floodway Schematic 111
TABLES
Table 1 – Initial and Final CCO Meetings 13-14
Table 2 – Scope of Revision 16
Table 3 – Letters of Map Change 17
Table 4 – Flooding Sources Studied by Detailed Methods 18-20
Table 5 – Areas Studied by Detailed Methods for Concord Watershed Countywide Analyses 20-22
Table 6 – Areas Studied by Redelineation for Concord Watershed Countywide Analyses 22
Table 7 – Areas Studied by Approximate Methods for Concord Watershed Countywide Analyses 23
Table 8 – Summary of Discharges 59-92
Table 9 – Summary of Elevations 93-94
Table 10 – Manning’s “n” Values 100-105
Table 11 – Community Map History 114-120
TABLE OF CONTENTS – Volume 2
TABLES – continued
Table 12 – Floodway Data 1-139
ii
TABLE OF CONTENTS – Volume 3
EXHIBITS
Exhibit 1 - Flood Profiles Aberjona River Panels 01P – 08P Aberjona River North Spur Panels 09P – 10P Alewife Brook (Little River) Panels 11P – 13P Angelica Brook Panels 14P – 15P Assabet Branch No. 3 Panels 16P – 17P Assabet Branch No. 4 Panel 18P Assabet River Panels 19P – 38P Baddacook Brook Panels 39P – 40P Baiting Brook Panels 41P – 43P Bear Meadow Brook Panel 44P Beaver Brook 1 Panels 45P – 49P Beaver Brook 2 Panels 50P – 54P Beaver Brook 2 - Split 1 Panels 55P Beaver Brook 2 - Split 2 Panels 56P Beaver Brook 2 - Split 3 Panels 57P Beaver Brook 3 Panels 58P – 61P Beaver Brook 4 Panels 62P – 71P Beaver Brook 5 Panels 72P – 73P Beaver Dam Brook Panels 74P – 82P Bennetts Brook Panels 83P – 87P Birch Meadow Brook Panel 88P Black Brook Panel 89P Bogastow Brook - Jar Brook Panels 90P – 95P Bogle Brook 1 Panels 96P – 97P Bogle Brook 2 Panels 98P – 103P Boons Pond and Branch Panel 104P Boutwell Brook Panels 105P – 106P Bow Brook Panels 107P – 108P
TABLE OF CONTENTS – Volume 4
EXHIBITS – continued
Exhibit 1 - Flood Profiles – continued Branch of Assabet River Panels 109P – 110P Branch of Elizabeth Brook 1 Panel 111P Broad Meadow Brook Panels 112P – 113P Brook A of Shawsheen River Panel 114P Brook from Waushakum Pond Panels 115P – 116P Butter Brook Panels 117P – 119P Catacoonamug Brook Panels 120P – 121P Charles River Panels 122P – 133P Cheese Cake Brook Panel 134P
iii
TABLE OF CONTENTS – Volume 4 – continued
EXHIBITS – continued
Exhibit 1 - Flood Profiles – continued Cherry Brook Panels 135P – 137P Chester Brook Panels 138P – 141P Chicken Brook Panels 142P – 145P Cochituate Brook Panel 146P Cold Brook Panel 147P Cold Spring Brook Panels 148P – 151P Cole's Brook Panel 152P Collins Brook Panel 153P Conant Brook Panels 154P – 157P Concord River Panels 158P – 164P Content Brook - Middlesex Canal Panels 165P – 167P Course Brook Panel 168P Cow Pond Brook Panels 169P – 171P Cranberry Brook Panels 172P – 173P Cummings Brook Panels 174P – 175P Dakins Brook Panel 176P Danforth Brook Panels 177P – 180P Darby Brook Panels 181P – 182P Davis Brook Panels 183P – 184P Dirty Meadow Brook Panel 185P Dopping Brook Panels 186P – 187P Dudley Brook / Tributary A to Dudley Brook Panels 188P – 191P East Outlet Panels 192P – 193P Elizabeth Brook 1 Panels 194P – 197P Elizabeth Brook 2 Panels 198P – 203P Elm Brook Panels 204P – 206P Farley Brook Panels 207P – 208P Farley Brook Split 1 Panels 209P Farrar Pond Brook Panels 210P – 211P Fort Meadow Brook Panels 212P – 217P
TABLE OF CONTENTS – Volume 5
EXHIBITS – continued
Exhibit 1 - Flood Profiles – continued Fort Pond Brook Panels 218P – 225P Fort Pond Brook Branch 1 Panel 226P Fort Pond Brook Branch 2 Panel 227P Grassy Pond Brook Panels 228P – 229P Graves Pond Brook Panel 230P
iv
TABLE OF CONTENTS – Volume 5 – continued
EXHIBITS – continued
Exhibit 1 - Flood Profiles – continued Great Road Tributary Panel 231P Greens Brook Panels 232P – 233P Guggins Brook Panels 234P – 236P Gumpas Pond Brook Panel 237P Hales Brook Panels 238P – 239P Halls Brook Panels 240P – 242P Hayward Brook Panels 243P – 244P Heath Brook Panels 245P – 246P Heath Hen Meadow Brook Panels 271P – 248P Heath Hen Meadow Brook Split Panels 249P Hobbs Brook 1 Panels 250P – 251P Hobbs Brook 2 Panels 252P – 253P Hog Brook Panels 254P – 255P Hop Brook Panels 256P – 260P Horn Pond Brook / Fowle Brook Panels 261P – 263P Inch Brook Panel 264P Ipswich River Panels 265P – 270P James Brook Panels 271P – 278P Jenny Dugan Brook Panels 279P – 280P Jones Brook Panels 281P – 282P Kiln Brook Panels 283P – 284P King Street Tributary Panels 285P – 286P Landham - Allowance Brook Panels 287P – 291P Lawrence Brook Panels 292P – 294P Little Brook Panel 295P Locke Brook Panels 296P – 297P Lower Spot Pond Brook Panel 298P Lubbers Brook Panels 299P – 304P Malden River Panels 305P – 307P Maple Meadow Brook Panels 308P – 310P Marginal Brook Panel 311P Marshall Brook Panels 312P – 314P Martins Brook Panels 315P – 317P
TABLE OF CONTENTS – Volume 6
EXHIBITS – continued
Exhibit 1 - Flood Profiles – continued Martins Pond Brook Panels 318P – 319P Mascuppic Brook Panels 320P – 321P Mason Brook Panels 322P – 325P Meadow Brook Panels 326P – 327P
v
TABLE OF CONTENTS – Volume 6 – continued
EXHIBITS – continued
Exhibit 1 - Flood Profiles – continued Meadow River Branch Panels 328P – 329P Merrimack River Panels 330P – 332P Mill Brook 1 Panels 333P – 335P Mill Brook 2 Panels 336P – 337P Mill Brook 3 Panels 338P – 341P Mill Pond Tributary Panels 342P – 343P Mill River Panels 344P – 346P Mineway Brook Panels 347P – 352P Mongo Brook Panels 353P – 354P Morse Brook Panel 355P Mowry Brook Panels 356P – 357P Mud Pond Brook Panel 358P Muddy Brook Panel 359P Mulpus Brook Panels 360P – 368P Munroe Brook Panels 369P – 371P Mystic River Panels 372P – 374P Nagog Brook Panels 375P – 377P Nashoba Brook Panels 378P – 381P Nashua River Panels 382P – 389P Nissitissit River Panels 390P – 392P Nonacoicus Brook 1 Panels 393P – 394P Nonacoicus Brook 2 Panel 395P North Lexington Brook Panels 396P – 398P Pages Brook Panels 399P – 401P Pages Brook Branch Panel 402P Pantry Brook Panels 403P – 405P Pearl Hill Brook Panels 406P – 409P Peppermint Brook Panel 410P Pine Brook Panel 411P Pole Brook Panels 412P – 415P Pratts Brook Panels 416P Putnam Brook Panels 417P Reedy Meadow Brook Panels 418P – 420P
TABLE OF CONTENTS – Volume 7
EXHIBITS – continued
Exhibit 1 - Flood Profiles – continued Reservoir No. 1 - North Branch and Reservoir No. 3 Panels 421P – 422P Richardson Brook Panels 423P – 425P River Meadow Brook Panels 426P – 430P Run Brook Panels 431P – 433P
vi
TABLE OF CONTENTS – Volume 7
EXHIBITS – continued
Exhibit 1 - Flood Profiles – continued Salmon Brook Panels 434P – 436P Sandy Brook Panels 437P – 438P Saugus River Panels 439P – 443P Saunders Brook Panel 444P Sawmill Brook 1 Panels 445P – 446P Sawmill Brook 2 Panel 447P Schneider Brook Panels 448P – 449P Shakers Glen Brook Panel 450P Shawsheen River Panels 451P – 458P Skug River Panels 459P – 460P Snake Brook Panels 461P – 462P South Meadow Brook - Paul Brook Panels 463P – 464P Spencer Brook Panel 465P – 468P Spring Brook Panels 469P – 471P Squannacook River Panels 472P – 478P Stony Brook Panels 479P – 480P Stony Brook 1 Panels 481P – 495P Stony Brook 2 Panels 496P – 502P Strong Water Brook Panels 503P – 504P Sudbury River Panels 505P – 514P Sutton Brook Panels 515P – 516P Sweetwater Brook Panel 517P Tadmuck Brook Panels 518P – 519P Tadmuck Swamp Brook Panel 520P
TABLE OF CONTENTS – Volume 8
EXHIBITS – continued
Exhibit 1 - Flood Profiles – continued Taylor Brook Panel 521P Tributary 1 to Cole’s Brook Panel 522P Tributary 1 to Sudbury River Panel 523P Tributary 2 to Assabet River Panel 524P Tributary 2 to Tributary 1 to Cole’s Brook Panel 525P Tributary 3 to Bogle Brook 2 Panel 526P Tributary 4 to Bogle Brook 2 Panel 527P Tributary A to Cold Brook Panels 528P – 530P Tributary A to Course Brook Panel 531P Tributary A to Hop Brook Panels 532P – 533P Tributary A to Pantry Brook Panels 534P – 535P Tributary A to Squannacook River Panels 536P – 537P Tributary B to Hop Brook Panel 538P
vii
TABLE OF CONTENTS – Volume 8 – continued
EXHIBITS – continued
Exhibit 1 - Flood Profiles – continued Tributary B to Squannacook River Panels 539P – 540P Tributary B to Vine Brook Panels 541P – 542P Tributary C to Vine Brook Panels 543P – 544P Tributary to Beaver Brook 3 Panel 545P Tributary to Cold Spring Brook Panels 546P – 547P Tributary to Indian Brook Panel 548P Tributary to Martins Brook Panel 549P Tributary to Mill Brook Panels 550P – 553P Tributary to Nonacoicus Brook 1/Long Pond Brook Panels 554P – 558P Tributary to Waushakum Pond Panels 559P – 560P Trout Brook Panels 561P – 562P Trout Brook 1 Panel 563P Trout Brook 2 Panels 564P – 566P Trull Brook Panels 567P – 572P Trull Brook Tributary Panels 573P – 574P Unkety Brook Panels 575P – 577P Valley Pond Panel 578P Varnum Brook Panels 579P – 582P Vine Brook Panels 583P – 589P Walker Brook 1 Panels 590P – 592P Walker Brook 2 Panels 593P – 596P Walker Brook 3 Panels 597P – 599P Walkers Brook Panels 600P – 603P Wellington Brook Panel 604P West Chester Brook Panels 605P – 607P Whitehall Brook Panels 608P – 610P Willard Brook Panels 611P – 612P Winthrop Canal Panels 613P – 614P Witch Brook Panels 615P – 617P
Exhibit 2 - Flood Insurance Rate Map Index Flood Insurance Rate Map
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(N
T
E
E
F
IN
N
IO
T 120 120
A
V
E
L
E
Y
C
N
115 115 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 110 110 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
1% ANNUAL CHANCE FLOOD Y
R
X
C
U
2% ANNUAL CHANCE FLOOD E
N
J
S
L 4% ANNUAL CHANCE FLOOD E
L
E
G
L
(A 10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
H I L CROSS SECTION LOCATION M
A
R
E
D
20000 20500 21000 21500 22000 22500 23000 23500 24000 24500 25000 25500 26000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CONCORD RIVER 22P )
2
6
E
T
U
O
(R
T
E
E
R
T
S
S
140 IN 140
E
R
A
E
M IL
F
IV
O
R
R T
E
P
B
A 135 135 D
S
O
S
O
A
L
F
)
8
8
D
V
A 130 130
(N
T
E
E
F
IN
N
IO
T 125 125
A
V
E
L
E
Y
C
N
120 120 E
G
A
A
T
N
E L M,
)
Y
M
S
E
T
N 115 115 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
1% ANNUAL CHANCE FLOOD Y
R
X
C
U
2% ANNUAL CHANCE FLOOD E
N
J
S
L 4% ANNUAL CHANCE FLOOD E
L
E
G
L
(A 10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
J K L CROSS SECTION LOCATION M
A
R
E
D
26000 26500 27000 27500 28000 28500 29000 29500 30000 30500 31000 31500 32000 32500 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CONCORD RIVER 23P )
2
6
E
T
U 150 M 150
O
A
D
(R
L
D
IL
A
O
M
R
R
L
E
L
I
D
W
M
S
O
R
145 P 145
E E
R
D
E
IL
W
F
O
IV
P
O
R
R T
E
P
B
A 140 140 D
S
O
S
O
A
L
F
)
8
8
D
V
A 135 135
(N
T
E
E
F
IN
N
IO
T 130 130
A
V
E
L
E
1
Y
Y
C
R
N A
T
T
E
125 F 125
E
U
G
E
O
IB
R E
A
R
T
C
A
T
N
T
S
E
R
H
N
U E
E
L
, M,
IG
IV
F
)
Y
H
M
N
R
S
D
E
O
T
T
L
N
E
C
G
O
120 B 120
N
IO
A
A
T
U
S LEGEND N
S
IC
A
O
A
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
1% ANNUAL CHANCE FLOOD Y
R
X
C
U
2% ANNUAL CHANCE FLOOD E
N
J
S
L 4% ANNUAL CHANCE FLOOD E
L
E
G
L
(A 10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
M N O L CROSS SECTION LOCATION M
A
R
E
D
32500 33000 33500 34000 34500 35000 35500 36000 36500 37000 37500 38000 38500 39000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CONCORD RIVER 24P 180 180
)
2
6
T
E
175 T 175
E
T
E
D
E
E
U
E
A
R
G
O
R
O
T
T
ID
R
S
(R
R
S
T A
M
B
T
E
A
ID
T
U
E
H
R
O
R
N
T
L
O
O
T
L
L
F
A
S
F
A
S
W
W 170 IN 170
E
R
A
E
IL
M
F
IV
O
R
R T
E
P
B
A 165 165 D
S
O
S
O
A
L
F
)
8
8
D
V
A 160 160
T
(N
E
T
E
E
R
E
T
F
S
L
IN
L
I
N
M
IO
T 155 155
A
V
E
L
E
Y
C
N
150 150 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 145 145 G N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
1% ANNUAL CHANCE FLOOD Y
R
X
C
U
2% ANNUAL CHANCE FLOOD E
N
J
S
L 4% ANNUAL CHANCE FLOOD E 140 L
E
G
L
(A 10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
P Q R S T U L CROSS SECTION LOCATION M
A
R
135 E
D
39000 39500 40000 40500 41000 41500 42000 42500 43000 43500 44000 44500 45000 45500 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CONCORD RIVER 25P 1
M
K
K
A
O
O
D
O
O
)
Y
R
R
2
N
B
6 B
A
D
H
E
R
P
A
T
T
O
M
E
O
L
U
O
B
R
Y
O
A
A
C
D
(R
IZ
N
N
T
L
D E
F
O
L
A
E
P
O
O
F
O
E
E
O
O
R
C
IT
E
T
N
W
H
S
C
E
A
N
W
N 185 E 185
U
E
A
E
L R
R
F
IC
U
E G
IL
L
N
R
F
F
E
O
IV
N
C
M
O
O
R
A
C
R T
E
P
B
A 180 180 D
S
O
S
O
A
L
F
)
8
8
D
V
A 175 175
(N
T
E
E
F
IN
N
IO
T 170 170
A
V
E
L
E
Y
C
N
165 165 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 160 160 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
1% ANNUAL CHANCE FLOOD Y
R
X
C
U
2% ANNUAL CHANCE FLOOD E
N
J
S
L 4% ANNUAL CHANCE FLOOD E
L
E
G
L
(A 10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
V W X L CROSS SECTION LOCATION M
A
R
E
D
45500 46000 46500 47000 47500 48000 48500 49000 49500 50000 50500 51000 51500 52000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CONCORD RIVER 26P 2
Y
R
A
T
U
IB
R
T
R
E
IV
R
T
E
B
A
S
S
A
S
F
E
O
R
E
E
IL
C
N
F
IV
E
U
O
R
L
F
R T
N
E
O
P
B
C
A 185 185 D
S
O
S
O
A
L
F
)
8
8
D
V
A 180 180
(N
T
E
E
F
IN
N
IO
T 175 175
A
V
E
L
E
Y
C
N
170 170 E
G
A
A
T
N
E
, M,
)
Y Z M
S
E
T
N 165 165 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
1% ANNUAL CHANCE FLOOD Y
R
X
C
U
2% ANNUAL CHANCE FLOOD E
N
J
S
L 4% ANNUAL CHANCE FLOOD E
L
E
G
L
(A 10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
Y L CROSS SECTION LOCATION M
A
R
E
D
52000 52500 53000 53500 54000 54500 55000 55500 56000 56500 57000 57500 58000 58500 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CONCORD RIVER 27P H
C
N
A
R
B
D
N
D
O
A
P
O
S
R
N
Y
O
R
O
U
B
B
F
D
O
U
E
S S
C
E
N
R
E
E
IL
U
L
F
IV
F
N
O
R
O
R T
C
E
P
B
A 185 185 D
S
O
S
O
A
L
F
)
8
8
D
V
A 180 180
(N
T
E
E
F
IN
N
IO
T 175 175
A
V
E
L
E
Y
C
N
170 170 E
G
A
A
T
N
E AA M,
)
Y
M
S
E
T
N 165 165 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
1% ANNUAL CHANCE FLOOD Y
R
X
C
U
2% ANNUAL CHANCE FLOOD E
N
J
S
L 4% ANNUAL CHANCE FLOOD E
L
E
G
L
(A 10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
L CROSS SECTION LOCATION M
A
R
E
D
58500 59000 59500 60000 60500 61000 61500 62000 62500 63000 63500 64000 64500 65000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CONCORD RIVER 28P 4
K
. .
O
O
O
N
R
H
B
C
N
W
A
O
R
D
A
B
E
T
E
M
B
T
A
R
S
O
S
F
A
F
F
O
O
E
S
E
C
E
C
N
R
N
E
E
IL
E
U
U
L
F
IV
L
F
F
O
N
R
N
O
R T
O
C
C
E
P
B
A 185 185 D
S
O
S
O
A
L
F
)
8
8
D
V
A 180 180
(N
T
E
E
F
IN
N
IO
T 175 175
A
V
E
L
E
Y
C
N
170 170 E
G
A
A
T
N
, M
E
Y
)
M
S
E T
N
G
165 165 N
IO
A
U
T LEGEND N
O
IC
A
0.2% ANNUAL CHANCE FLOOD D
M
IS
C
1% ANNUAL CHANCE FLOOD Y
R
X
C
U
2% ANNUAL CHANCE FLOOD E
N
J
L
E 4% ANNUAL CHANCE FLOOD S
L
G
E
(A
R 10% ANNUAL CHANCE FLOOD L
E
D
STREAM BED M
ID
E
AB L
CROSS SECTION LOCATION M
A
R
E
D
65000 65500 66000 66500 67000 67500 68000 68500 69000 69500 70000 70500 71000 71500 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CONCORD RIVER 29P )
2
6
E
T
D
U
A
200 O 200
O
(R
R
D
M
A
O
M
O
T
A
R
T
D
E
O
L
B
A
K
D
C
S
N 195 O 195
O
E
R
R
S
E
A
IL
E
F
L
IV
G
O
R
R T
R
E
E
P
B
IV
A
D
R
190 F 190
S
T
O
E
S
O
E
B
O
A
C
A
L
S
N
F
E
S
U
A
)
L
F
8
F
8
N
O
O
H
D
C
V
C
A 185 185
N
A
(N
R
T
B
E
E
F
IN
N
IO
T 180 180
A
V
E
L
E
Y
C
N
175 175 E
G
A
A
T
N
, M
E
Y
)
M
S
E T
N
G
170 170 N
IO
A
U
T LEGEND N
O
IC
A
0.2% ANNUAL CHANCE FLOOD D
M
IS
C
1% ANNUAL CHANCE FLOOD Y
R
X
C
U
2% ANNUAL CHANCE FLOOD E
N
J
L
E 4% ANNUAL CHANCE FLOOD S
L
G
E
(A
R 10% ANNUAL CHANCE FLOOD L
E
D
STREAM BED M
ID
E
AC AD L
CROSS SECTION LOCATION M
A
R
E
D
71500 72000 72500 73000 73500 74000 74500 75000 75500 76000 76500 77000 77500 78000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CONCORD RIVER 30P 3
. .
O
N
H
C
N
A
R
B
T
T
E
E
E
B
R
A
T
S
S
S
X
A
O
F
C
O
S
E
E
C
R
N
E
IL
E
U
F
IV
L
F
O
R
N
R T
O
C
E
P
B
A 200 200 D
S
O
S
O
A
L
F
)
8
8
D
V
A 195 195
(N
T
E
E
F
IN
N
IO
T 190 190
A
V
E
L
E
Y
C
N
185 185 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 180 180 G N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
1% ANNUAL CHANCE FLOOD Y
R
X
C
U
2% ANNUAL CHANCE FLOOD E
N
J
S
L 4% ANNUAL CHANCE FLOOD E L
E
G
L
(A 10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
AE L CROSS SECTION LOCATION M
A
R
E
D
78000 78500 79000 79500 80000 80500 81000 81500 82000 82500 83000 83500 84000 84500 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CONCORD RIVER 31P 3
Y
R
A
T
U
IB
)
R
2
T
6
R
E
E
E
T
U
U
IV
N
D
O
R E
A
V
T
(R
O
E
T
A
R
B
E
T
IL
A
E
S
A
S
R
E
S
R
T
R
O
A
S
S
F
F
210 IN 210
E
O
R
A
E
E
IL
M
C
N
F
IV
E
U
O
R
L
F
R T
N
E
O
P
B
C
A 205 205 D
S
O
S
O
A
L
F
)
8
8
D
V
A 200 200
(N
T
E
E
F
IN
N
IO
T 195 195
A
V
E
L
E
Y
C
N
190 190 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 185 185 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
1% ANNUAL CHANCE FLOOD Y
R
X
C
U
2% ANNUAL CHANCE FLOOD E
N
J
S
L 4% ANNUAL CHANCE FLOOD E 180 L
E
G
L
(A 10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
AF AG L CROSS SECTION LOCATION M
A
R
E
D
84500 85000 85500 86000 86500 87000 87500 88000 88500 89000 89500 90000 90500 91000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CONCORD RIVER 32P 230 230
K
)
5
O
O
8
K
R
E
O
T
B O
U
R
H
T
O
T 225 E 225
B
T
E
R
G
(R
E E
R
O
E
O
T
G
Y
D
T F
E
R
A
A
N
H
ID
S E
T
O
F
A
W
R
R
N
R
S
L
B
T
O
O
D
D
IL
IL
T
E
F
T
S
A
P
A
O
C
O
H
N
O
S
R
O
N
G
E
O
R
F
E
U
C
T
B
U
S
O
N
G 220 L 220
H E
E
F
R
IN
U
N
H
L
E
IL
O
F
S
C
F
IV
N
A
O
W
O
R
C
R T
E
P
B
A 215 215 D
S
O
S
O
A
L
F
)
8
8
D
V
A 210 210
(N
T
E
E
F
IN
N
IO
T 205 205
A
V
E
L
E
Y
C
N
200 200 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 195 195 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
1% ANNUAL CHANCE FLOOD Y
R
X
C
U
2% ANNUAL CHANCE FLOOD E
N
J
S
L 4% ANNUAL CHANCE FLOOD E 190 L
E
G
L
(A 10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
AH AI AJ AK AL L CROSS SECTION LOCATION M
A
R
E
D
91000 91500 92000 92500 93000 93500 94000 94500 95000 95500 96000 96500 97000 97500 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CONCORD RIVER 33P 4
Y
R
A
T
U
IB
R
T
R
E
D
IV
A
R
O
T
R
E
B
IN
A
P
S
A
S
H
C
A
S
F
E
O
R
E
E
IL
C
N
F
IV
E
U
O
R
L
F
R T
N
E
O
P
B
C
A 220 220 D
S
O
S
O
A
L
F
)
8
8
D
V
A 215 215
(N
T
E
E
F
IN
N
IO
T 210 210
A
V
E
L
E
Y
C
N
205 205 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 200 200 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
1% ANNUAL CHANCE FLOOD Y
R
X
C
U
2% ANNUAL CHANCE FLOOD E
N
J
S
L 4% ANNUAL CHANCE FLOOD E 195 L
E
G
L
(A 10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
AM L CROSS SECTION LOCATION M
A
R
E
D
97500 98000 98500 99000 99500 100000 100500 101000 101500 102000 102500 103000 103500 104000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CONCORD RIVER 34P 230 230
225 225 S
E
R
E
IL
F
IV
O
R
R T
E
P
B
A 220 220 D
S
O
S
O
A
L
F
)
8
8
D
V
A 215 215
(N
T
E
E
F
IN
N
IO
T
210 5 5 210
A
9 9
V
4 4
E
L
E E
E
T T
A A
T T
S S
Y
R R
E E
C
T T
N
IN IN
205 205 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 200 200 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
1% ANNUAL CHANCE FLOOD Y
R
X
C
U
2% ANNUAL CHANCE FLOOD E
N
J
S
L 4% ANNUAL CHANCE FLOOD E
L
E
G
L
(A 10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
AN L CROSS SECTION LOCATION M
A
R
E
D
104000 104500 105000 105500 106000 106500 107000 107500 108000 108500 109000 109500 110000 110500 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CONCORD RIVER 35P K
O
O
R
B
D
Y Y Y
Y Y Y
N
T T T
T T T
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N N N
N N N
D
U U U
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U U U
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O O O
S
O O O
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C C C
C C C
T
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R R R
X X X
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S S S
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ID
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L L L
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D D D
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ID ID ID
O O O
225 N 225
E
M M M
W W W
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L
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A 220 220 D
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8
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A 215 215
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F
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A
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T
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M
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N 200 200 G
N
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A
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IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
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1% ANNUAL CHANCE FLOOD Y
R
X
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2% ANNUAL CHANCE FLOOD E
N
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L 4% ANNUAL CHANCE FLOOD E
L
E
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L
(A 10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
AO L CROSS SECTION LOCATION M
A
R
E
D
110500 111000 111500 112000 112500 113000 113500 114000 114500 115000 115500 116000 116500 117000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CONCORD RIVER 36P T
I
C
K
D
O
R
O
A
R
V
Y
Y
T
E
B
T
T
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N
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T
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8
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M
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N
IO
A
T
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IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
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1% ANNUAL CHANCE FLOOD Y
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X
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2% ANNUAL CHANCE FLOOD E
N
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S
L 4% ANNUAL CHANCE FLOOD E
L
E
G
L
(A 10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
AP AQ L CROSS SECTION LOCATION M
A
R
E
D
117000 117500 118000 118500 119000 119500 120000 120500 121000 121500 122000 122500 123000 123500 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CONCORD RIVER 37P Y
Y
T
T
N
N
U
U
O
O
C
C
M
R
X
E
A
E
T
D
S
S
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L
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D
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S
ID 235 O 235
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M
W
R
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IL
F
IV
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E
P
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A 230 230 D
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8
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A 225 225
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B
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N
N
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F
F
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T
220 B 220
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L
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N
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L
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215 215 E
G
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Y
M
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N 210 210 G
N
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A
T
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IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
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1% ANNUAL CHANCE FLOOD Y
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X
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2% ANNUAL CHANCE FLOOD E
N
J
S
L 4% ANNUAL CHANCE FLOOD E 205 L
E
G
L
(A 10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
AS AT L CROSS SECTION LOCATION M
A
R
E
D
123500 124000 124500 125000 125500 126000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CONCORD RIVER 38P 1% ANNUAL CHANCE BACKWATER FROM COW POND BROOK
K
H
O
IT
D
O
A
W
R
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E
B
R
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M
D
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N
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8
8
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F
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A
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L
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N
195 195 E
G
A
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T
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)
Y
M
S
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T
N 190 190 G N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
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1% ANNUAL CHANCE FLOOD X
C
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N
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L
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185 L
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L
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10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
A L CROSS SECTION LOCATION M
A
R
180 E
D
0 200 400 600 800 1000 1200 1400 1600 1800 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH COW POND BROOK 39P 240
235
D
D
A
A
O
M
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R
A
R
S
D
T
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8
8
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A 220 220
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T
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F
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T
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N IM LEGEND
L
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
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Y
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1% ANNUAL CHANCE FLOOD X
C
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N
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L
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200 L
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L
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10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
B L CROSS SECTION LOCATION M
A
R
E
D
1800 2000 2200 2400 2600 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH COW POND BROOK 40P
1% ANNUAL CHANCE BACKWATER FROM IPSWICH RIVER
R
E
IV
Y
R
D
H
U
T
T
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E
E
S
W
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T
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S
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L
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S
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E
76 H IT 76
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R
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F
L
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)
8
8
D
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A 72 72
(N
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F
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T 70 70
A
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N
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G
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T
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)
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M
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N 66 66 G
N
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A
T
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IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
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1% ANNUAL CHANCE FLOOD X
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L
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10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
A B C L CROSS SECTION LOCATION M
A
R
62 E
D
0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH IPSWICH RIVER 44P 0 0
6 6
E E
T T
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55 O O 55
F K
R R
O
0
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8
D
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E
F
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T 35 35
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G
A
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T
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Y
M
S
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T
N 25 25 G N
IO
A
T
U
N
D LEGEND
IC
A
A
O
O 0.2% ANNUAL CHANCE FLOOD D
R
M
C
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R
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C
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R
E
N
J
2% ANNUAL CHANCE FLOOD S
L E I E
L
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G
L
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10% ANNUAL CHANCE FLOOD R
E D H D
STREAM BED M
ID
E
A B C F G J K L M N O L CROSS SECTION LOCATION M
A
R
E
D
2800 3000 3200 3400 3600 3800 4000 4200 4400 4600 4800 5000 5200 5400 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CHARLES RIVER 45P D D D
A A A
O O O
R R R
IL IL IL
A A A
R R R
50 50 S
E
1
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E
D
45 45 V
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8
D
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A 40 40
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T
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F
IN
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T 35 35
A
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N
30 30 E
G
A
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T
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)
Y
M
S
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T
N 25 25 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
P Q R S T L CROSS SECTION LOCATION M
A
R
E
D
5400 5600 5800 6000 6200 6400 6600 6800 7000 7200 7400 7600 7800 8000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CHARLES RIVER 46P T
E
E
D
R
A
T
O
S
R
R
IL
E
A
V
R
A
E
S
B
E
1
K
IL
O
F
O
O
R
R
B
P R
E
D
55 55 V
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A
E
O
B
L
F
)
8
8
D
V
A 50 50
(N
T
E
E
F
IN
N
IO
T 45 45
A
V
E
L
E
Y
C
N
40 40 E
G
A
A
T
N
E AB M,
)
Y
M
S
E
T
N
G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
V W X Y Z AA L CROSS SECTION LOCATION M
A
R
E
D
8000 8200 8400 8600 8800 9000 9200 9400 9600 9800 10000 10200 10400 10600 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CHARLES RIVER 47P 65 65 S
E
1
K
IL
O
F
O
O
R
R
B
P R
E
D
60 60 V
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E
O
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L
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)
8
8
D
V
A 55 55
(N
T
E
E
F
IN
N
IO
T 50 50
A
V
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L
E
Y
C
N
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G
A
A
T
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E
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)
Y
M
S
E
T
N 40 40 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
AC AD L CROSS SECTION LOCATION M
A
R
E
D
10600 10800 11000 11200 11400 11600 11800 12000 12200 12400 12600 12800 13000 13200 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CHARLES RIVER 48P Y
D
U
T
S
D
E
IL
A
T
E
D
F
O
S
80 IT 80
E
1
IM
K
IL
L
O
F
O
O
R
R
B
P R
E
D
75 75 V
O
A
E
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L
F
)
8
8
D
V
A 70 70
(N
T
E
E
F
IN
N
IO
T 65 65
A
V
E
L
E
Y
C
N
60 60 E
G
A
A
T
N
E
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)
Y
M
S
E
T
N 55 55 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
AE AF L CROSS SECTION LOCATION M
A
R
E
D
13200 13400 13600 13800 14000 14200 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CHARLES RIVER 49P
1% ANNUAL CHANCE BACKWATER FROM MERRIMACK RIVER
K
T T
3
O
T
E
F
E E
T
1
E
O
E
E E
U
E
K
O
E
1
R
C
E
R R
N
C
E
E
R
T T E
R
N
B
A
C
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T
T
E
V
T
R
T
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N
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M
M
IT
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S
IM
T T E S
A
O
L
IN
A
A
S
R
W
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R
R U
N N
F
D
D
A
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M
L
E
R E
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F
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IN
M A A
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B
L L C
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P
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S 100 P P 100
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3
F
R
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A
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W
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N
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R
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)
8
8
D
V
A 80 80
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T
E
E
F
IN CULVERT
N
IO
T 70 70
A
V
E
L
E
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CULVERT C
N
60 60 E
G
A
A
T
N
E
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)
Y
M
S
E
T
N 50 50 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
40 L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
A B C D E L CROSS SECTION LOCATION M
A
R
E
D
0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MERRIMACK RIVER 58P 3
K
D
O
A
O
O
R
R
F
B
M
R
O
R
E
E
V A
C
A
F
N
E
K
E
O
B
U
L
O
O
F
T R
N
Y
B
O
R
R
S
C
E
A
E
V
T
3
A
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B
O
F
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T
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R
B
P R
E
D
V
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A
E
O
B
L
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)
8
8
D
V
A 100 100
(N
T
E
E
F
IN
N
IO
T 90 90
A
V
E
L
E
Y
C
N
80 80 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 70 70 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
F G H L CROSS SECTION LOCATION M
A
R
E
D
6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 12500 13000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MERRIMACK RIVER 59P W
E
U
IE
M
V
N
A
E
E
D
K
V
A
A
L
130 F 130
K
O
O
E
O
C
R
N
B
E
E
U
L
L
B
F
U
N
O
O
D
S 120 C 120
E
3
K
IL
O
F
O
O
R
R
B
P R
E
D
110 110 V
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A
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)
8
8
D CULVERT
V
A 100 100
(N
T
E
E
F
IN
N
IO
T 90 90
A
V
E
L
E
Y
C
N
80 80 E
G
A
A
T
N
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)
Y
M
S
E
T
N 70 70 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
I J L CROSS SECTION LOCATION M
A
R
E
D
13000 13500 14000 14500 15000 15500 16000 16500 17000 17500 18000 18500 19000 19500 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MERRIMACK RIVER 60P K
O
O
Y
R
F
R
E
B
A
O
IV
D
E
D
R
C
N
N
D
N O
U
E
E
O
P
U
IN
S
B
L
R
A
E
F
R
P
T
N
O
A
O
M
C
T
S
C
U
S
E
G
3
F
K
IL
O
O
F
O
O
R
R
B
P R
E
D
V
O
A
E
O
B
L
F
)
8
8
D
V
A 130 130
(N
T
E
E
F
IN
N
IO
T 120 120
A
V
E
L
E
Y
C
N
110 110 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 100 100 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
L L CROSS SECTION LOCATION M
A
R
E
D
19500 20000 20500 21000 21500 22000 22500 23000 23500 24000 24500 25000 25500 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MERRIMACK RIVER 61P 1% ANNUAL CHANCE BACKWATER FROM FORGE POND
D
N
O
P
D
E
A
G
E
O
R
G
R
O
ID
F
K
R
O
H
B
O
IT
R
N
E
B
W
D
E
R
O
E
C
O
V
N
S
E
A
W
E
U
E
4
L
B
F
K
IL
N
O
F
O
O
C
O
R
R
B
P R
E
D
210 210 V
O
A
E
O
B
L
F
)
8
8
D
V
A 205 205
(N
T
E
E
F
IN
N
IO
T 200 200
A
V
E
L
E
Y
C
G N
195 195 E
G
A
F A
T
N
E E M,
)
Y
M
S
E
T
N
G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L C E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E B D
STREAM BED M
ID
E
A D L CROSS SECTION LOCATION M
A
R
E
D
0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FORGE POND 62P S
E
4
K
IL
O
F
O
O
R
R
B
P R
E
D
V
O
A
E
O
B
L
F
)
8
8
D
V
A 210 210
(N
T
E
E
F
IN
N
IO
T 205 205
A
V
E
L
E
Y
C
N
200 200 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 195 195 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
H L CROSS SECTION LOCATION M
A
R
E
D
6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 12500 13000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FORGE POND 63P Y
R
A
9
T
F
1
U
D
O
1
D
E
IB
A
E
A
C
R
T
O
O
N
U
T
R
E R
O
D
T
U
M
A
A
R
L
R
E
E
F O
A
R
T
N
R
F
G
A
O
T
T
S
C
A
S
E
E
4
R
K
G
IL
O
F
O
O
R
R
B
P R
E
D
215 215 V
O
A
E
O
B
L
F
)
8
8
D
V
A 210 210
(N
T
E
E
F
IN
N CULVERT CULVERT
IO
T 205 205
A
V
E
L
E
Y
C
N
200 200 E
G
A
A
T
N
E L M,
)
Y
M
S
E
T
N
G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
I J K L CROSS SECTION LOCATION M
A
R
E
D
13000 13500 14000 14500 15000 15500 16000 16500 17000 17500 18000 18500 19000 19500 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FORGE POND 64P 0
Y
1
5 5
R
9 9
1
A
D
4 4
T
F
E E
N
U
D
D
T T
T
O
A
N
N
D
E
IB
U U E
A
E
U
U
A
R
C
O O
R
O
O
O
2
N
T
R R
T
B
B
S
E
E E T
R
E
H
H
U
S
L
E
T T
T
L
T
T
E
G
A A
IL
F
U
R
U
R
T T
N
IN
M
O
O
O
T
S S
K
O
S
N
R
R R
S
S
C
E
E E
G
E
T
T T
4
IN
A
IN IN
K
K
IL
T
S
O
F
O
O
R
R
B
P R
E
D
220 220 V
O
A
E
O
B
L
F
)
8
8
D
V
A 215 215
(N
T
E
E CULVERT CULVERT F CULVERT
IN
N CULVERT
IO
T 210 210
A
V
E
L
E
Y
C
N
205 205 E
G
A
A
T
N
E Q M,
)
Y
M
S
E
T
N 200 200 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
M N O P L CROSS SECTION LOCATION M
A
R
E
D
19500 20000 20500 21000 21500 22000 22500 23000 23500 24000 24500 25000 25500 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FORGE POND 65P MILL POND
Y
Y
R
E
A
A
5
F
U
T
W
T
9
E
N
L
O
U
E
E
4
L
E
D
I
R
V
E
IB
C
A
P
T
T
R
N
A
O
S
A
S
E
D
R
T
T
D
R
U
O
D
IL
S
L
N
O
O
N
A
F
R
L
O
O
E R
W
N
Y
P
T
R
O
A
P
L
L
S
A
T
C
IN
IL
H
230 IL 230
E
4
M
M
K
IL
O
F
O
O
R
R
B
P R
E
D
225 225 V
O
A
E
O
B
L
F
) CULVERT
8
8
D
V
A 220 220
(N CULVERT T CULVERT
E CULVERT
E
F
IN
N
IO
T 215 215
A
V
E
L
E
Y
C
N
210 210 E
G
A
A
T
N
E U M,
)
Y
M
S
E
T
N 205 205 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
R S T L CROSS SECTION LOCATION M
A
R
E
D
25500 26000 26500 27000 27500 28000 28500 29000 29500 30000 30500 31000 31500 32000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FORGE POND 66P E
G
ID
240 R 240
D
B
A
T
O
O
O
R
F
R
E
N
T
IA
R
R
O
T
P
S
S
235 E 235
E
4
D
E
K
IL
P
O
F
O
O
R
R
B
P CULVERT R
E
D
230 230 V
O
A
E
O
B
L
F
)
8
8
D
V
A 225 225
(N
T
E
E CULVERT
F
IN
N
IO
T 220 220
A
V
E
L
E
Y
C
N
E
215 Y 215
C
2
A
G
A
E
A
T
W
A
A
U
H
IS
T
O
IG
IN
N
R
H
A
E
E
, M,
T
T
IS Y
)
P
Y
V
A
M
S
A
T
A
E
T
C
S
D
N
G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
V W X L CROSS SECTION LOCATION M
A
R
E
D
32000 32500 33000 33500 34000 34500 35000 35500 36000 36500 37000 37500 38000 38500 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FORGE POND 67P D
A
O
R
L
E
V
A
R
G
S
E
4
K
IL
O
F
O
O
R
R
B
P R
E
D
V
O
A
E
O
B
L
F
)
8
8
D
V
A 230 230
(N
T
E
E
F
IN
N
IO
T 225 225
A
V
E
L
E
Y
C
N
220 220 E
G
A
A
T
N
E AH AI M,
)
Y
M
S
E
T
N 215 215 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E AC AE D
STREAM BED M
ID
E
Z AA AB AD AF AG L CROSS SECTION LOCATION M
A
R
E
D
38500 39000 39500 40000 40500 41000 41500 42000 42500 43000 43500 44000 44500 45000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FORGE POND 68P 245 245 S
E
4
K
IL
O
F
O
O
R
R
B
P R
E
D
240 240 V
O
A
E
O
B
L
F
)
8
8
D
V
A 235 235
(N
M
T
A
E
E
D
H
F
T
R
IN
A
N
E
IO
T 230 230
A
V
E
L
E
Y
C
N
225 225 E
G
A
AQ A
T
N
E AO AP M,
)
Y
M
S
E
T
N 220 220 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
AJ AK AL AM AN L CROSS SECTION LOCATION M
A
R
E
D
45000 45500 46000 46500 47000 47500 48000 48500 49000 49500 50000 50500 51000 51500 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FORGE POND 69P D
D
N
N
U
U
D
O
O
A
B
B
O
H
H
T
T
R
R
U
B
O
O
M
S
N
O
5
5
C
9
9
IT
4
4
H
E
E
T
T
W
A
A
T
S
T
T 270 S 270
S
E
S
E
4
R
R
W
K
E
E
IL
T
T
O
F
IN
IN
O
O
R
R
B
P R
E
D
265 265 V
O
A
E
O
B
L
F
)
8
8
D
V
A 260 260
(N
T
E
E
F
IN
N
IO
T 255 255
A
V
E
L
E
Y
C
N
250 250 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 245 245 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
240 L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E AV D
STREAM BED M
ID
E
AR AS AT AU AW AX AY L CROSS SECTION LOCATION M
A
R
235 E
D
51500 52000 52500 53000 53500 54000 54500 55000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FORGE POND 70P Y
D
U
T
S
D
D
D
A
E
A
O
IL
O
A
R
R
T
M L
E
R
IL
D
A
H
F
F
O
S
295 IT 295
E
4
IM
K
IL
L
O
F
O
O
R
R
B
P R
E
D
290 290 V
O
A
E
O
B
L
F
)
8
8
D
V
A 285 285
(N
T
E
E
F
IN
E
N
U
IO N
E
T 280 1 280
V
1
A
V
A
1
E
E
S
L
T
T
E
U
T
E
O
S
R
U
E
Y
H
T
C
C
A
A
N
T
S
S 275 275 E
S
G
A
A
M
A
T
N
E
, M,
)
Y
M
S
E
T
N 270 270 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
265 L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E BA BC D
STREAM BED M
ID
E
AZ BB BD L CROSS SECTION LOCATION M
A
R
260 E
D
55000 55500 56000 56500 57000 57500 58000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH FORGE POND 71P Y
P
D
M
U
A
T
T
E
D
R
S
E
A
N
R
D
O
E
T
O
R
IL
S
2
T
A
E
T
T
T
T
N
E
E
U
A
R
D
O
S
R
F
A
R
A
E
E
O
B
S
L
T
P
IT
E
A
5
T
IM
K
IL
S
L
O
F
O
O
R
R
B
P R
E
D
205 205 V
O
A
E
O
B
L
F
)
8
8
D
V
A 200 200
(N
T
E
E
F
IN
N
IO
T 195 195
A
V
E
L
E
Y
C
N
190 190 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
Y Y
N
G
185 A A 185 N
IO
2 2 A
W W
E E
T
U
N
H H
T T LEGEND
IC
A
U U
O
IG IG
O O 0.2% ANNUAL CHANCE FLOOD D
H H
M
C
R R
D D
IS
E E
R R Y
R
X
T T 1% ANNUAL CHANCE FLOOD
O O
C
U
A A
E
C C
T T
N
J
N N
S S S 2% ANNUAL CHANCE FLOOD
L
E
O O
L
E
C C
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
A B C D E F L CROSS SECTION LOCATION M
A
R
E
D
21400 21600 21800 22000 22200 22400 22600 22800 23000 23200 23400 23600 23800 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CHARLES RIVER 72P Y
D
U
T
S
D
E
IL
A
T
E
D
F
O
S
IT
E
5
IM
K
IL
L
O
F
O
O
R
R
B
P R
E
D
V
O
A
E
O
B
L
F
)
8
8
D
V
A 205 205
(N
T
E
E
F
IN
N
IO
T 200 200
A
V
E
L
E
Y
C
N
195 195 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 190 190 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
G H L CROSS SECTION LOCATION M
A
R
E
D
23800 24000 24200 24400 24600 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CHARLES RIVER 73P
Y
D
U
T
E
S
IV
D
E
R
IL
D
A
E
T
T
E
A
D
V
I
F
R
P
O
S
K
IT
E
O
IM
IL
O
L
F
R
O
B
S
R
T
P
T
E 220 220 D N
O
N
O
E
L
B
F
)
8
8
D CULVERT
V
A 215 215
(N
T
E
E
F
IN
N
IO
T 210 210
A
V
E
L
E
Y
C
N
205 205 E
G
A
A
T
N
E C D M,
)
Y
M
S
E
T
N
G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
A B L CROSS SECTION LOCATION M
A
R
E
D
600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3200 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SPECTACLE POND 83P D
A
D
O
A
R
O
R
W
IL
O
L
A
R
IL
W
S
245 245 K
E
O
IL
O
F
R
O
B
S
R
T
P
T
E 240 240 D
N
O
N
O
E
L
B
F
)
8
8
D
V
A 235 235
(N
T
E
E
F
IN
N
IO
T 230 230
A
V
E
L
E
Y
C
N
225 225 E
G
A
A
T
N
E H M,
)
Y
M
S
E
T
N 220 220 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
215 L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
E F G L CROSS SECTION LOCATION M
A
R
210 E
D
3200 3400 3600 3800 4000 4200 4400 4600 4800 5000 5200 5400 5600 5800 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SPECTACLE POND 84P Y
Y
D
D
U
U
T
T
A
D
S
A
S
2
D
O
E
D
E
E
T
R
IL
U
IL
N
A
O
A
O
T
T
T
R
E
E
E
E
D
D
L
T
T
F
F
A
T
IT
O
O
S
L
S
K
IT
IT
E
O
IM
IM
IL
O
L
L
F
R
O
B
S
R
T
P
T
E
THE 10%, 2%, 1%, AND 0.2% ANNUAL CHANCE FLOOD D
N ELEVATIONS ARE SHOWN ON THE FLOOD PROFILE WITHIN THE O
N
O TOWN OF LITTLETON FOR INFORMATIONAL PURPOSES ONLY E
L
B
F
)
8
8
D
V
A 255 255
(N
T
E
E
F
IN
N
IO
T 250 250
A
V
E
L
E
Y
C
N
245 245 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 240 240 G N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
I J L CROSS SECTION LOCATION M
A
R
E
D
5800 6000 6200 6400 6600 6800 7000 7200 7400 7600 7800 8000 8200 8400 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SPECTACLE POND 85P SHAKER MILL POND
G
IN
S
S
O
R
M M
C
A A
S
D D
T
T
E
N
S
N
K
E
E
B
O
IL
O
F
R
O
B
S
R
T
P
T
E 265 265 D
N
O
N
O
E
L
B
F
)
8
8
D
V
A 260 260
(N
T
E
E
F
IN
N
IO
T 255 255
A
V
E
L
E
Y
C
N
250 250 E
G
A
A
T
N
E M M,
)
Y
M
S
E
T
N 245 245 G N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
K L L CROSS SECTION LOCATION M
A
R
E
D
8400 8600 8800 9000 9200 9400 9600 9800 10000 10200 10400 10600 10800 11000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SPECTACLE POND 86P SHAKER MILL POND
Y
D
R
A
A
D
O
D
A
N
O
R
U
L
R
O
IL
R
E
B
H
K
Y
E
T
A
K
N
H
A
S
U
N
S
O
S
K
E
C
O
IL
O
F
R
O
B
S
R
T
P
T
E
D
N
O
N
O
E
L
B
F
)
8
8
D
V
A 270 270
(N
T
E
E
F
IN
N
IO
T 265 265
A
V
E
L
E
Y
C
N
260 260 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 255 255 G N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
250 L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
N O P L CROSS SECTION LOCATION M
A
R
E
D
11000 11200 11400 11600 11800 12000 12200 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SPECTACLE POND 87P
1% ANNUAL CHANCE BACKWATER FROM MERRIMACK RIVER
Y
L
D
D
R
A
U
T
T
A
N
T
E
T
E
T F
V
E
A
E
E
E
E
S
E
U
E
O
R
E
R
C D
L
E
D R
N
T
T
R
E
X
U
C
E
T
A
T
E
S
IL
O
S
V
N
O
S
S
X
A
S
D
E
B
R
E
A
E
T
R
R
U
IN
L
N
T
IL
S
E
E
L
O
D
O
E
T
W
A
F
D
B
F
L
T
A
D
R
B
ID
T
N
F
E
D
L
R
E
S
O
C
A
P O
E M
S
ID
C
W
B
D
IN
IT
W
M E
L
R
O
K
P
IM
IL
L
O
F
O
R
O
R
E
R
IV
B
R
K
P
K
C
C
D
A
A
L
O
IM
B
O
R
R
L
E
F
M
)
H
8 THE 2% ANNUAL CHANCE FLOOD PROFILE
IT
8
IS TOO CLOSE TO THE 1% ANNUAL FLOOD
D
W
V
E ELEVATION TO BE SHOWN SEPARATELY
A 115 115
C
N
(N
E
T
U
E
L
E
F
N
F
O
IN C
N
IO
T 105 105
A
V CULVERT
E
L
E CULVERT
Y
CULVERT C
N
95 95 E CULVERTS G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 85 85 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
75 L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
A B C D E F G H L CROSS SECTION LOCATION M
A
R
65 E
D
0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MERRIMACK RIVER 89P
K
Y O
T
R
O
F
E
A R
E
O
D
B
R
E
N
T
C
W
U
N
O
S K
O
E
L
D
O
B
U
A
A
L
Y
E O
R
F
T
T
R
N
N M
N
O
B
Y
U
E
S
C
T
O
C
R
E
C
IR
A
D
IL
F
- J
O
K
R
O
O
P
R
D
155 155 B
O
W
O
O
L
T
F
S
)
A
8
G
8
O
D
B
V
A 150 150
(N
T
E
E
F
IN
N
IO
T 145 145
A
V
E
L
E
Y
C
N
140 140 E
G
A
A
T
N
E
, M,
Y
)
M
S
E
T
N 135 135 G
N
A
IO
U
T LEGEND N
A
O
IC
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R 1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
E
L
E
L
G
A
L
R
10% ANNUAL CHANCE FLOOD (
E
D
STREAM BED M
ID
E
A B C D L CROSS SECTION LOCATION M
A
R
E
D
0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 E
F STREAM DISTANCE IN FEET ABOVE COUNTY BOUNDARY* * COUNTY BOUNDARY IS APPROXIMATELY 1,945 FEET DOWNSTREAM OF CENTRAL STREET 90P
K
F
T
O
O
E
O
E
E
R
C
R
B
N
T
K
E
G
S
O
U
E
IN
L
O
K
P
F
R
P
N
IS
O
F
B
O
S
D
C
R
E
A
IL
F
- J
O
K
R
O
O
P
R
D
160 160 B
O
W
O
O
L
T
F
S
)
A
8
G
8
O
D
B
V
A 155 155
(N
T
E
E
F
IN
N
IO
T 150 150
A
V
E
L
E
Y
C
N
145 145 E
G
A
A
T
N
E H M,
Y
)
M
S
E
T
N 140 140 G
N
A
IO
U
T LEGEND N
A
O
IC
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R 1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
E
L
E
L
G
A
L
R
10% ANNUAL CHANCE FLOOD (
E
D
STREAM BED M
ID
E
E F G L CROSS SECTION LOCATION M
A
R
E
D
6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 12500 13000 E
F STREAM DISTANCE IN FEET ABOVE COUNTY BOUNDARY* * COUNTY BOUNDARY IS APPROXIMATELY 1,945 FEET DOWNSTREAM OF CENTRAL STREET 91P 185 185 BOGASTOW BROOK/JAR BROOK FACTORY POND
M
T 180 A 180
E
D
E
D
R
T
N
O
S
K
D
P
O
Y
N
O
R
A
L
O
R
T
W
B
C
S
O
A
L
175 175 R
E
F
A
IL
F
- J
O
K
R
O
O
P
R
D
170 170 B
O
W
O
O
L
T
F
S
)
A
8
G
8
O
D
B
V
A 165 165
(N
T
E
E
F
IN
N
IO
T 160 160
A
V
E
L
E
Y
C
N
155 155 E
G
A
A
T
N
E M M,
Y
)
M
S
E
T
T
N
G 150 E 150
N
E
A
IO
R
U
T
N
T
D LEGEND
A
A
O
IC
S
O
D
0.2% ANNUAL CHANCE FLOOD D
R
N
M
C
IS
IL
A
Y
L
R
X
A 1% ANNUAL CHANCE FLOOD
C
D
R
U
E
O
N
J
S O 2% ANNUAL CHANCE FLOOD
E
L
145 W
E
L
G
A
L
R
10% ANNUAL CHANCE FLOOD (
E
D
STREAM BED M
ID
E
I J K L L CROSS SECTION LOCATION M
A
R
E
D
13000 13500 14000 14500 15000 15500 16000 16500 17000 17500 18000 18500 19000 19500 E STREAM DISTANCE IN FEET ABOVE COUNTY BOUNDARY* F * COUNTY BOUNDARY IS APPROXIMATELY 1,945 FEET DOWNSTREAM OF CENTRAL STREET 92P HOUGHTON POND
M
T T
A
E E
E
E E
D
R R
IV
D
D
T T
R
A
N
S S
O
D
O
N N
D
R
K
P
O O
L
N
IS
O
T T
IE
O
V
G G
F
O
T
A
T
IN IN
R
H
R
S
H H
T
G
E
B
S S
S
U
W
A A
O
195 195 R
E
W W H
A
IL
F
- J
O
K
R
O
O
P
R
D
190 190 B
O
W
O
O
L
T
F
S
)
A
8
G
8
O
D
B
V
A 185 185
(N
T
E
E
F
IN
N
IO
T 180 180
A
V
E
L
E
Y
C
N
175 175165 E
G
A
A
CULVERTS T
N
E T M,
Y
)
M
S
E
T
N 170 170160 G N
A
IO
U
T LEGEND N
A
O
IC
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R 1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
E 165 L
E
L
G
A
L
R
10% ANNUAL CHANCE FLOOD (
E
D
STREAM BED M
ID
E
N O P Q R S L CROSS SECTION LOCATION M
A
R
160 E
D
19500 20000 20500 21000 21500 22000 22500 23000 23500 24000 24500 25000 25500 26000 E
F STREAM DISTANCE IN FEET ABOVE COUNTY BOUNDARY* * COUNTY BOUNDARY IS APPROXIMATELY 1,945 FEET DOWNSTREAM OF CENTRAL STREET 93P 215 D 215
T
A
T
D
E
E
O
A
E
E
R
O
R
R
T
N
R
T
K
E
D
S
S
L
R
O
R
L
E
E
A
L
O
E
T
P
H
H
R
A
IN
IC
T
B
M
R
U
S
W
R
210 210 R
E
A
IL
F
- J
O
K
R
O
O
P
R
D
205 205 B
O
W
O
O
L
T
F
S
)
A
8
G
8
O
D
B
V
A 200 200
(N
T
E
E
F
IN
N
IO
T 195 195
A
V
E
L
E
Y
C
N
190 190 E
G
A
A
T
N
E
, M,
Y
)
M
S
E
T
N 185 185 G N
A
IO
U
T LEGEND N
A
O
IC
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R 1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
E 180 L
E
L
G
A
L
R
10% ANNUAL CHANCE FLOOD (
E
D
STREAM BED M
ID
E
U V W X Y Z AA AB L CROSS SECTION LOCATION M
A
R
E
D
26000 26500 27000 27500 28000 28500 29000 E STREAM DISTANCE IN FEET ABOVE COUNTY BOUNDARY* F * COUNTY BOUNDARY IS APPROXIMATELY 1,945 FEET DOWNSTREAM OF CENTRAL STREET 94P Y
D
U
E
T
N
A
D
S
A
L
D
E
E
D D
O
K
N
A A
O
IL
R
A
O O
O
A
H
L
R
T
C
R R
D
K
E
B
T T
A
R
O
E
W D
R
O
A
F
S
E
O
C
O
H
R
B
E
D
O
C
R
O
O
G
A
T
R
I
B
D R
E
A
O
S
T
M
IM
240 240 R
E
S
L
A
IL
F
- J
O
K
R
O
O
P
R
D
235 235 B
O
W
O
O
L
T
F
S
)
A
8
G
8
O
D
B
V
A 230 230
(N
T
E
E
F
IN
N
IO
T 225 225
A
V
E
L
E
Y
C
N
220 220 E
G
A
A
T
N
E
, M,
Y
)
M
S
E
T
N
G
215 215 N
A
IO
U
T LEGEND N
A
O
IC
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R 1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
E
L
210 E L
G
A
L
R
10% ANNUAL CHANCE FLOOD (
E AL D
STREAM BED M
ID
E
AC AD AE AF AG AH AI AJ AK L CROSS SECTION LOCATION M
A
R
205 E
D
29000 29500 30000 30500 31000 E STREAM DISTANCE IN FEET ABOVE COUNTY BOUNDARY* F * COUNTY BOUNDARY IS APPROXIMATELY 1,945 FEET DOWNSTREAM OF CENTRAL STREET 95P Y
D
U
T
S
T
D
E
E
E
IL
R
A
T
T
S
E
K
D
A
F
O
O
S
IT
E
1
IM
IL
L
K
F
O
O
O
R
R
B
P
E
L 140 140 D
G
O
O
O
B
L
M
F
A
)
D
8
8
D
V
A 135 135
(N
T
E
E
F
IN
N
IO
T 130 130
A
V
E
L
E
Y
C
N
125 125 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 120 120 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
A B C D E L CROSS SECTION LOCATION M
A
R
E
D
0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 E STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY* F *LIMIT OF DETAILED STUDY IS APPROXIMATELY 1,609 FEET DOWNSTREAM OF OAK STREET 96P Y
D
U
T
9
S
E
D
T
E
U
IL
O
A
T
R
E
E
T
D
A
F
T
O
S
S
IT
E
1
IM
IL
L
K
F
O
O
O
R
R
B
P
E
L
D
G
O
O
O
B
L
F
)
8
8
D
V
A 140 140
(N
T
E
E
F
IN
N
IO
T 135 135
A
V
E
L
E
Y
C
N
130 130 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 125 125 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
F G H I L CROSS SECTION LOCATION M
A
R
E
D
2600 2800 3000 3200 3400 3600 3800 4000 4200 4400 4600 E
F STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY* *LIMIT OF DETAILED STUDY IS APPROXIMATELY 1,609 FEET DOWNSTREAM OF OAK STREET 97P 2
K
O
Y
O
D
R
U
E
T
B
L
F
E
S
C
L
O
D
IR
G
E
E
C
O
C
IL
N
N
B
A
E
R
T
O
U
E
U
L
T
D
B
F
4
R
F
N
Y
E
O
O
R
H S
C
A
S
175 IT 175
E
T
2
U
IM
IL
L
K
IB
F
O
R
T
O
O
R
R
B
P
E
L 170 170 D
G
O
O
O
B
L
F
)
8
8
D
V
A 165 165
(N
T
E
E
F
IN
N
IO
T 160 160
A
V
E
L
E
Y
C
N
155 155 E
G
A
A
T
N
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)
Y
M
S
E
T
N 150 150 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
A B C D E F G H L CROSS SECTION LOCATION M
A
R
E
D
0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 E
F STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY * LIMIT OF DETAILED STUDY IS APPROXIMATELY 1,430 FEET DOWNSTREAM OF SHERBURN CIRCLE 98P T
T
E
E
E
E
R
R
T
T
S
S
R
E
E
L
T
G
O
IN
B
S
W
E
2
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F
O
O
O
R
R
B
P
E
L 180 180 D
G
O
O
O
B
L
F
)
8
8
D
V
A 175 175
(N
T
E
E
F
IN
N
IO
T 170 170
A
V
E
L
E
Y
C
N
165 165 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 160 160 G N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
K L M N O L CROSS SECTION LOCATION M
A
R
E
D
2600 2800 3000 3200 3400 3600 3800 4000 4200 4400 4600 4800 5000 5200 E
F STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY * LIMIT OF DETAILED STUDY IS APPROXIMATELY 1,430 FEET DOWNSTREAM OF SHERBURN CIRCLE 99P T
C
U
D
A
U
Q
3
A
Y
C
R
D
A
M
2 195 T 195
K
0
U
O
9
IB
O
E
R
R
T
T
A
B
F
T
E
L
S
O
G
E
R
E
C
O
T
N
B
E
IN
S
O 190 U 190
L
E
T
F
NONESUCH 2
N
IL POND K
O
F
O
C
O
O
R
R
B
P
E
L 185 185 D
G
O
O
O
B
L
F
)
8
8
D
V
A 180 180
(N
T
E
E F CULVERT
IN
N
IO
T 175 175
A
V
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L
E
Y
C
N
170 170 E
G
A
A
T
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)
Y
M
S
E
T
N 165 165 G N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
P Q R S L CROSS SECTION LOCATION M
A
R
E
D
5200 5400 5600 5800 6000 6200 6400 6600 6800 7000 7200 7400 7600 7800 E
F STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY * LIMIT OF DETAILED STUDY IS APPROXIMATELY 1,430 FEET DOWNSTREAM OF SHERBURN CIRCLE 100P )
0
E E
E
3
U
T
IV IV
E
E
N
R R
T
E
E
D D
U
R
V
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T
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S
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T T
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N N
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IN
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O O
T
S
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200 (S 200
E
2
IL
K
F
O
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R
R
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P
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L 195 195 D
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8
8
D
V
A 190 190
(N
T
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F
IN
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T 185 185
A
V
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L
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C
N
180 180 E
G
A
A
T
N
E AA AB M,
)
Y
M
S
E
T
N 175 175 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
V W X Y Z L CROSS SECTION LOCATION M
A
R
E
D
7800 8000 8200 8400 8600 8800 9000 9200 9400 9600 9800 10000 10200 10400 E
F STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY * LIMIT OF DETAILED STUDY IS APPROXIMATELY 1,430 FEET DOWNSTREAM OF SHERBURN CIRCLE 101P S
E
2
IL
K
F
O
O
O
R
R
B
P
E
L
D
G
O
O
O
B
L
F
)
8
8
D
V
A
(N
T
E
E
F
IN
N
IO
T 200 200
A
V
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L
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C
N
195 195 E
G
A
A
T
N
E AE M,
)
Y
M
S
E
T
N 190 190 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
AC AD L CROSS SECTION LOCATION M
A
R
E
D
10400 10600 10800 11000 11200 11400 11600 11800 12000 12200 12400 12600 E
F STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY * LIMIT OF DETAILED STUDY IS APPROXIMATELY 1,430 FEET DOWNSTREAM OF SHERBURN CIRCLE 102P Y
D
U
T
S
D
E
IL
A
T
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D
F
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E
2
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L
K
F
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R
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)
8
8
D
V
A
(N
T
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F
IN
N
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T 210 210
A
V
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L
E
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C
N
205 205 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 200 200 G
N
IO
A
T
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IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
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1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
195 L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
AF L CROSS SECTION LOCATION M
A
R
E
D
12600 12800 13000 13200 E STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY F * LIMIT OF DETAILED STUDY IS APPROXIMATELY 1,430 FEET DOWNSTREAM OF SHERBURN CIRCLE 103P 1% ANNUAL CHANCE BACKWATER FROM ASSABET RIVER
H
Y
R
IT
D
E
D
A
W
V
U
I
O
T
E
R
R
C
S
T
N
N
F
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T
A
T
L
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R
S
F
A
S H
N
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B
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L
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C 195
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N
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R
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D
R
N
P
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D 190 190 P
S
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B
)
8
8
D
V
A 185 185
(N
T
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E
F
IN
N
IO
T 180 180
A
V
E
L
E
Y
C
N
175 175 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 170 170 G N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
165 L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
A B L CROSS SECTION LOCATION M
A
R
E
D
0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH ASSABET RIVER 104P 1% ANNUAL CHANCE BACKWATER FROM STONY BROOK 2
D
D
D
A
D
A
H
A
O
A
2
T
O
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IT
R
E
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K
R
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W
D
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S
D
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M
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205 205 T
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)
A
8
8
R
D
V
A 200 200
(N
T
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F
IN
N
IO
T 195 195
A
V
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L
E CULVERTS
Y
C
N
190 190 E
CULVERTS G
A
P A
T
N
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)
Y
M
S
E
T
N 185 185 G N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
180 L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E B D H K N D
STREAM BED M
ID
E
A C E F G I J L M L CROSS SECTION LOCATION M
A
R
E
D
0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH STONY BROOK 2 105P Y
D
U
T
D
S
A
D
D
O
A
E
O
R
IL
D
R
A
R
N
T
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F
T
D
T
T
F
R
A
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H
K
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L
F
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B
L
R
L
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P
W
D
T
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L
B
F
)
8
8
D V 210 210
A
(N
T
E
E
F
IN
N
IO
T 205 205
A
V
E
L
E
Y
C
N
200 200 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 195 195 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E S D
STREAM BED M
ID
E
Q R L CROSS SECTION LOCATION M
A
R
E
D
6500 7000 7500 8000 8500 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH STONY BROOK 2 106P K
O
O
R
B
G
U
D
M
A
A
D
O
N
A
O
R
O
O
G
R
C
U
R
A
M
E
M
T
A T
A
A
S
N
D
C
O
IN
H
O
M
C
IT
O
A
S
E
T
W
295 L 295
E
E
A
C
C
IL
N
K
E
F
O
U
L
O
O
F
R
R
N
O
B
C
P
W
D
290 290 O
O
B
O
L
F
)
8
8
D
V
A 285 285
(N
T
E
E
F
IN
N
IO
T 280 280
A
V
E
L E CULVERT
Y
C
N
275 275 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N 270 270 G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
265 L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
A B L CROSS SECTION LOCATION M
A
R
E
D
0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CATACOONAMUG BROOK 107P Y
D
U
T
E
S
D
IV
E
R
IL
D
A
E
T
T
E
A
D
V
I
F
R
O
P
S
IT
E
IM
IL
L
K
F
O
O
O
R
R
B
P
W
D
O
O
B
O
L
F
)
8
8
D V 295 295
A
(N
T
E
E
F
IN
N
IO
T 290 290
A
V
E
L
E
Y
C
N
285 285 E
G
A
A
T
N
E
, M,
)
Y
M
S
E
T
N
G
N
IO
A
T
U LEGEND N
IC
A
O
0.2% ANNUAL CHANCE FLOOD D
M
C
IS
Y
R
1% ANNUAL CHANCE FLOOD X
C
U
E
N
J
2% ANNUAL CHANCE FLOOD S
L
E
L
E
G
L
(A
10% ANNUAL CHANCE FLOOD R
E
D
STREAM BED M
ID
E
L CROSS SECTION LOCATION M
A
R
E
D
2200 2400 2600 2800 3000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH CATACOONAMUG BROOK 108P