VOLUME 5 OF 5
HILLSBOROUGH COUNTY, NEW HAMPSHIRE (ALL JURISDICTIONS)
COMMUNITY NAME COMMUNITY NUMBER AMHERST, TOWN OF 330081 ANTRIM, TOWN OF 330082 BEDFORD, TOWN OF 330083 BENNINGTON, TOWN OF 330084 BROOKLINE, TOWN OF 330180 DEERING, TOWN OF 330085 FRANCESTOWN, TOWN OF 330086 GOFFSTOWN, TOWN OF 330087 GREENFIELD, TOWN OF 330209 GREENVILLE, TOWN OF 330088 HANCOCK, TOWN OF 330089 HILLSBOROUGH, TOWN OF 330090 HOLLIS, TOWN OF 330091 HUDSON, TOWN OF 330092 LITCHFIELD, TOWN OF 330093 LYNDEBOROUGH, TOWN OF 330218 MANCHESTER, CITY OF 330169 MASON, TOWN OF 330221 Hillsborough County MERRIMACK, TOWN OF 330095 MILFORD, TOWN OF 330096 MONT VERNON, TOWN OF 330224 NASHUA, CITY OF 330097 NEW BOSTON, TOWN OF 330098 NEW IPSWICH, TOWN OF 330099 PELHAM, TOWN OF 330100 PETERBOROUGH, TOWN OF 330101 SHARON, TOWN OF 330192 TEMPLE, TOWN OF 335781 WEARE, TOWN OF 330235 WILTON, TOWN OF 330102 WINDSOR, TOWN OF 335780
Initial Countywide FIS Effec tive Date: September 25, 2009 Federal Emergency Management Agency
FLOOD INSURANCE STUDY NUMBER 33011CV005A
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: September 25, 2009
TABLE OF CONTENTS – Volume 1
Page
1.0 INTRODUCTION 1 1.1 Purpose of Study 1 1.2 Authority and Acknowledgments 1 1.3 Coordination 6
2.0 AREA STUDIED 7 2.1 Scope of Study 7 2.2 Community Description 9 2.3 Principal Flood Problems 10 2.4 Flood Protection Measures 11
3.0 ENGINEERING METHODS 13 3.1 Hydrologic Analyses 13 3.2 Hydraulic Analyses 34 3.3 Vertical Datum 42
4.0 FLOODPLAIN MANAGEMENT APPLICATIONS 43 4.1 Floodplain Boundaries 43 4.2 Floodways 45
5.0 INSURANCE APPLICATIONS 95
6.0 FLOOD INSURANCE RATE MAP 97
7.0 OTHER STUDIES 97
8.0 LOCATION OF DATA 101
9.0 BIBLIOGRAPHY AND REFERENCES 101
i TABLE OF CONTENTS - Volume 1 - continued
Page
FIGURES
Figure 1 - Floodway Schematic 95
TABLES
Table 1 – Initial and Final CCO Meetings 6
Table 2 - Streams Studied by Detailed Methods 7
Table 3 – Scope of Revision 8
Table 4 – Letters of Map Correction 9
Table 5 - Summary of Discharges 20-33
Table 6 - Summary of Stillwater Elevations 34
Table 7 – Manning’s “n” values 40-41
Table 8 - Floodway Data Table 46-93
Table 9 - Community Map History 98-100
TABLE OF CONTENTS – Volume 2
EXHIBITS
Exhibit 1 - Flood Profiles Autumn Brook Panels 01P-03P Baboosic Brook Panels 04P-15P Bartemus Brook Panel 16P Beards Brook Panels 17P-24P Beaver Brook No. 1 Panels 25P-29P Beaver Brook No. 2 Panels 30P-34P Bettys Brook Panels 35P-37P Black Pond Brook Panels 38P-42P Bog Brook Panels 43P-45P
ii TABLE OF CONTENTS – Volume 2 - continued
EXHIBITS - continued
Exhibit 1 - Flood Profiles (continued) Bowman Brook Panels 46P-51P Caesars Brook Panels 52P-53P Chase Brook Panels 54P-57P Contoocook River Panels 58P-71P Deering Reservoir Panels 72P-73P East Branch of Baboosic Brook Panel 74P Ferguson Brook Panels 75P-76P Gambol Brook Panels 77P-80P Golden Brook Panels 81P-84P Gorham Brook Panel 85P Great Brook No. 1 Panels 86P-89P
TABLE OF CONTENTS – Volume 3
EXHIBITS - continued
Exhibit 1 - Flood Profiles (continued) Great Brook No. 2 Panels 90P-91P Great Cohas Brook Panels 92P-95P Gumpas Pond Brook Panels 96P-103P Gumpas Road Brook Panels 104P-106P Hartshorn Brook Panel 107P Hassells Brook Panels 108P-109P Holts Brook Panel 110P Hosley Brook Panel 111P Island Pond Brook Panels 112P-113P Joe English Brook Panels 114P-116P Limit Brook Panel 117P Lyle Reed Brook Panel 118P McQuade Brook Panels 119P-123P McQuade Brook Split Flow Panel 124P Merrimack River Panels 125P-136P Middle Branch Piscataquog River Panels 137P-144P Mill Brook Panels 145P-159P Moose Brook Panel 160P Nashua River Panels 161P-163P Naticook Brook Panels 164P-166P Nesenkeag River Panels 167P-171P New Meadow Brook Panels 172P-173P Nissitissit River Panels 174P-175P North Branch Panels 176P-178P North Branch Contoocook River Panels 179P-181P North Channel Piscataquog River Panel 182P
iii TABLE OF CONTENTS – Volume 4
EXHIBITS - continued
Exhibit 1 - Flood Profiles (continued) Nubanusit Brook Panels 183P-194P Otter Brook Panels 195P-205P Otter Lake Brook Panels 206P-208P Ox Brook Panel 209P Parkhurst Brook Panel 210P Peacock Brook Panels 211P-212P Pennichuck Brook Panels 213P-220P Piscataquog River Panels 221P-240P Pointer Club Brook Panels 241P-245P Pulpit Brook Panels 246P-248P Purgatory Brook Panels 249P-252P Riddle Brook Panels 253P-256P Salmon Brook Panels 257P-260P Sand Brook Panels 261P-267P Second Brook Panels 268P-271P
TABLE OF CONTENTS – Volume 5
EXHIBITS - continued
Exhibit 1 - Flood Profiles (continued) Shedd Brook Panels 272P-277P Sherburn Mill Brook Panels 278P-280P Simpson Mill Brook Panels 281P-282P Souhegan River Panels 283P-309P South Branch Piscataquog River Panels 310P-320P Spit Brook Panels 321P-323P Stony Brook Panels 324P-335P Tioga River Panels 336P-344P Tributary A Panel 345P Tributary B No. 1 Panels 346P-347P Tributary B No. 2 Panels 348P-353P Tucker Brook Panels 354P-358P Witches Brook Panels 359P-362P
Exhibit 2 - Flood Insurance Rate Map Index Flood Insurance Rate Map
iv 680 680 1% ANNUAL CHANCE BACKWATER FROM BEARDS BROOK
K
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CROSS SECTION LOCATION IL
A
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590 E
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0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.55 0.60 0.65 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH BEARDS BROOK 272P 720 720
710 710
700 700 S
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CROSS SECTION LOCATION IL
A
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630 E
D
0.60 0.65 0.70 0.75 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20 1.25 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH BEARDS BROOK 273P 750 750
740 740
730 730 S
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690 690 E
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660 E
D
1.00 1.05 1.10 1.15 1.20 1.25 1.30 1.35 1.40 1.45 1.50 1.55 1.60 1.65 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH BEARDS BROOK 274P 790 790
D
780 A 780
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S
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1.15 1.20 1.25 1.30 1.35 1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75 1.80 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH BEARDS BROOK 275P 850 850
840 840
830 830 S
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1.75 1.80 1.85 1.90 1.95 2.00 2.05 2.10 2.15 2.20 2.25 2.30 2.35 2.40 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH BEARDS BROOK 276P 890 890
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2.25 2.30 2.35 2.40 2.45 2.50 2.55 2.60 2.65 2.70 2.75 2.80 2.85 2.90 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH BEARDS BROOK 277P 230 230 1% ANNUAL CHANCE BACKWATER FROM SOUHEGAN RIVER
D
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185 E
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0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 1.10 1.20 1.30 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH SOUHEGAN RIVER 278P 245 245
240 240
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1.30 1.40 1.50 1.60 1.70 1.80 1.90 2.00 2.10 2.20 2.30 2.40 2.50 2.60 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH SOUHEGAN RIVER 279P 265 265
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F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH SOUHEGAN RIVER 280P 146 146 1% ANNUAL CHANCE BACKWATER EFFECT FROM GOLDEN BROOK
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0 200 400 600 800 1000 1200 1400 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH GOLDEN BROOK 281P 146 146
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1400 1600 1800 2000 2200 2400 2600 2800 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH GOLDEN BROOK 282P 170 170 1% ANNUAL CHANCE BACKWATER FROM MERRIMACK RIVER HIGH CHORD = 177.3
R
E LOW CHORD = 173.3
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CROSS SECTION LOCATION IL
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80 E
D
0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 1.10 1.20 1.30 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 283P 220 220
210 210
S
200 200 R
E
E
IL
IV
F
R
O
N
R
A
G
P
E
D
190 190 H
O
U
O
O
S
L
F
)
8
8
D
V
A 180 180
(N
T
E
E
F
IN
N
IO
T 170 170
A
V
E
L
E
Y
C
N
160 160 E
G
H
A
T
, N
N
Y
E
G T
)
M
N
S
E
N
U 150 150 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 140 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
F L
CROSS SECTION LOCATION IL
A
H
R
130 E
D
1.30 1.40 1.50 1.60 1.70 1.80 1.90 2.00 2.10 2.20 2.30 2.40 2.50 2.60 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 284P 220 220
E
G
ID
210 R 210
B
D
A
O
R
L
IL
H
Y
S
E
K
200 200 R
E
R
E
U
IL
T
IV
F
R
O
N
R
A
G
P
E
D
190 190 H
O
U
O
O
S
L
F
)
8
8
D
V
A 180 180
(N
T
E
E
F
IN
N
IO
T 170 170
A
V
E
L
E
Y
C
N
160 160 E
G
H
A
T
, N
N
Y
E
I T
)
M
N
S
E
N
U 150 150 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 140 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
H L
CROSS SECTION LOCATION IL
A
H
R
130 E
D
2.60 2.70 2.80 2.90 3.00 3.10 3.20 3.30 3.40 3.50 3.60 3.70 3.80 3.90 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 285P 220 220
210 210
S
200 200 R
E
E
IL
IV
F
R
O
N
R
A
G
P
E
D
190 190 H
O
U
O
O
S
L
F
)
8
8
D
V
A 180 180
(N
T
E
E
F
IN
N
IO
T 170 170
A
V
E
L
E
Y
C
N
160 160 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 150 150 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 140 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
J L
CROSS SECTION LOCATION IL
A
H
R
130 E
D
3.90 4.00 4.10 4.20 4.30 4.40 4.50 4.60 4.70 4.80 4.90 5.00 5.10 5.20 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 286P 230 230
220 220
S
210 210 R
E
E
IL
IV
F
R
O
N
R
A
G
P
E
D
200 200 H
O
U
O
O
S
L
F
)
8
8
D
V
A 190 190
(N
T
E
E
F
IN
N
IO
T 180 180
A
V
E
L
E
Y
C
N
170 170 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 160 160 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 150 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
K L M L
CROSS SECTION LOCATION IL
A
H
R
140 E
D
5.20 5.30 5.40 5.50 5.60 5.70 5.80 5.90 6.00 6.10 6.20 6.30 6.40 6.50 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 287P 250 250
K
O
O
R
E
G
B
L
D
I
IL
R
M
240 )B 240
N
S
R
D
U
L
B
IE
R
E
(F
H
D
A
S
F
O
O
R
S
E
Y
230 230 R
C
T
E
E
N
N
E
IL
U
IV
U
O
F
L
R
C
F
O
N
N
O
R
A
C
G
P
E
D
220 220 H
O
U
O
O
S
L
F
)
8
8
D
V
A 210 210
(N
T
E
E
F
IN
N
IO
T 200 200
A
V
E
L
E
Y
C
N
190 190 E
G
H
A
T
, N
N
Y
E
P Q T
)
M
N
S
E
N
U 180 180 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 170 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
N O L
CROSS SECTION LOCATION IL
A
H
R
160 E
D
6.50 6.60 6.70 6.80 6.90 7.00 7.10 7.20 7.30 7.40 7.50 7.60 7.70 7.80 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 288P 250 250
240 240
S
230 230 R
E
E
IL
IV
F
R
O
N
R
A
G
P
E
D
220 220 H
O
U
O
O
S
L
F
)
8
8
D
V
A 210 210
(N
T
E
E
F
IN
N
IO
T 200 200
A
V
E
L
E
Y
C
N
190 190 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 180 180 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 170 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
L
CROSS SECTION LOCATION IL
A
H
R
160 E
D
7.80 7.90 8.00 8.10 8.20 8.30 8.40 8.50 8.60 8.70 8.80 8.90 9.00 9.10 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 289P 250 250
E
G
ID
240 R 240
B
D
A
O
R
T
S
O
P
N
S
O
230 230 R
E
T
E
S
IL
O
IV
B
F
R
O
N
R
A
G
P
E
D
220 220 H
O
U
O
O
S
L
F
)
8
8
D
V
A 210 210
(N
T
E
E
F
IN
N
IO
T 200 200
A
V
E
L
E
Y
C
N
190 190 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 180 180 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 170 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
R L
CROSS SECTION LOCATION IL
A
H
R
160 E
D
9.10 9.20 9.30 9.40 9.50 9.60 9.70 9.80 9.90 10.00 10.10 10.20 10.30 10.40 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 290P 260 260
2
#
K
O
O
R
B 250 E 250
R
G
E
ID
V
R
A
E
B
T
B
R
H
A
IT
C
F
W
L
E
O
S
C
G
240 240 R
E
N
E
E
U
IL
L IV
F
F
R
N
O
O
N
C
R
A
G
P
E
D
230 230 H
O
U
O
O
S
L
F
)
8
8
D
V
A 220 220
(N
T
E
E
F
IN
N
IO
T 210 210
A
V
E
L
E
Y
C
N
200 200 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 190 190 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 180 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
L
CROSS SECTION LOCATION IL
A
H
R
170 E
D
10.40 10.50 10.60 10.70 10.80 10.90 11.00 11.10 11.20 11.30 11.40 11.50 11.60 11.70 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 291P 260 260
2
250 2 250
D
1
A
Y
O
A
R
W
H
H
A
IG
K
M
O
H
E
E
O
N
1
T
R
O
0
A
S
P
B
T 1
240 240 R
E
S
E
S
E
T
T
L
IL
U
IV
O
O F
R
H
R
F
O
E
N
O
T
R
E
A
A
C
T
G
P
N
E
S
E
D
U
H 230 W 230
L
E
O
U
F
N
N
O
O
O
S
L
C
F
)
8
8
D
V
A 220 220
(N
T
E
E
F
IN
N
IO
T 210 210
A
V
E
L
E
Y
C
N
200 200 E
G
H
A
T
, N
N
Y
E
U V W T
)
M
N
S
E
N
U 190 190 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 180 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
S T L
CROSS SECTION LOCATION IL
A
H
R
170 E
D
11.70 11.80 11.90 12.00 12.10 12.20 12.30 12.40 12.50 12.60 12.70 12.80 12.90 13.00 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 292P 270 270
260 260
S
250 250 R
E
E
IL
IV
F
R
O
N
R
A
G
P
E
D
240 240 H
O
U
O
O
S
L
F
)
8
8
D
V
A 230 230
(N
T
E
E
F
IN
N
IO
T 220 220
A
V
E
L
E
Y
C
N
210 210 E
G
H
A
T
, N
N
Y
E
Z AA T
)
M
N
S
E
N
U 200 200 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 190 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
X Y L
CROSS SECTION LOCATION IL
A
H
R
180 E
D
13.00 13.10 13.20 13.30 13.40 13.50 13.60 13.70 13.80 13.90 14.00 14.10 14.20 14.30 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 293P 280 280
K
O
O
R
M
A
B
T
D 270 3 270
A
E
M
E
1
E
IC
A
E
R
G
V
T
D
G
R
ID
U
N
E
H
R
O
A
B
S
IT
R
T
M
E
IC
O
W
D
L
T
L
E
O
B
A
F
O
C
U
T
G
N
S
S
E
P
260 260 R
E
U
D
E
L
L
F
IL
O
IV
N
F
R
O
C O
N
R
A
G
P
E
D
250 250 H
O
U
O
O
S
L
F
)
8
8
D
V
A 240 240
(N
T
E
E
F
IN
N
IO
T 230 230
A
V
E
L
E
Y
C
N
220 220 E
G
H
A
T
, N
N
Y
E
AD T
)
M
N
S
E
N
U 210 210 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 200 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
AB AC L
CROSS SECTION LOCATION IL
A
H
R
190 E
D
14.30 14.40 14.50 14.60 14.70 14.80 14.90 15.00 15.10 15.20 15.30 15.40 15.50 15.60 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 294P 300 300
K
O
O
R
B
R
290 E 290
K
C
U
T
H
IT
W
E
C
S
N
E 280 280 R
E
U
E
L
IL
F
IV
F
N
R
O
O
C
N
R
A
G
P
E
D
270 270 H
O
U
O
O
S
L
F
)
8
8
D
V
A 260 260
(N
T
E
E
F
IN
N
IO
T 250 250
A
V
E
L
E
Y
C
N
240 240 E
G
H
A
T
, N
N
Y
E
AH T
)
M
N
S
E
N
U 230 230 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 220 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
AE AF AG L
CROSS SECTION LOCATION IL
A
H
R
210 E
D
15.60 15.70 15.80 15.90 16.00 16.10 16.20 16.30 16.40 16.50 16.60 16.70 16.80 16.90 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 295P 300 300
K
K
O
O
O
O
R
R
B
B
N
Y
R
R
O 290 O 290
H
T
S
A
T
G
R
R
A
U
H
P
H
H
T
T
I
I
W
W
E
S
E
C
C 280 280 R
E
N
N
E
E
E
IL
U
U
IV
L
F
L
F
R
F
O
N
N
N
O
O
R
C
C
A
G
P
E
D
270 270 H
O
U
O
O
S
L
F
)
8
8
D
V
A 260 260
(N
T
E
E
F
IN
N
IO
T 250 250
A
V
E
L
E
Y
C
N
240 240 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 230 230 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 220 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
AI L
CROSS SECTION LOCATION IL
A
H
R
210 E
D
16.90 17.00 17.10 17.20 17.30 17.40 17.50 17.60 17.70 17.80 17.90 18.00 18.10 18.20 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 296P 330 330
320 G 320
IN
S
S
O
R
C
S
E
N
O S
J
310 310 R
E
E
IL
IV
F
R
O
N
R
A
G
P
E
D
300 300 H
O
U
O
O
S
L
F
)
8
8
D
V
A 290 290
(N
T
E
E
F
IN
N
IO
T 280 280
A
V
E
L
E
Y
C
N
270 270 E
G
H
A
T
, N
N
Y
E
AM T
)
M
N
S
E
N
U 260 260 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 250 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
AJ AK AL L
CROSS SECTION LOCATION IL
A
H
R
240 E
D
18.20 18.30 18.40 18.50 18.60 18.70 18.80 18.90 19.00 19.10 19.20 19.30 19.40 19.50 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 297P 360 360
M
D
A
)
A
T
D
O
E
Y
R
E
N
R
IL
A
350 T 350
A
M
P
S
A
R
M
E
M
D
O
L
L
IN
C
L
I
A
E
(E
D
M
IN
M
A
Y
H
D
O
E
C
N
L
R
A
L
A
N
S
A
N
M
O
340 340 R
E
V
T
O
T
E E
T
T
IL
IL
S
O
IN
IV
W
O
B
P
F
R
B
B
O
A
N
R
A
G
P
E
D
330 330 H
O
U
O
O
S
L
F
)
8
8
D
V
A 320 320
(N
T
E
E
F
IN
N
IO
T 310 310
A
V
E
L
E
Y
C
N
300 300 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 290 290 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 280 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
AN AO AP AQ L
CROSS SECTION LOCATION IL
A
H
R
270 E
D
19.50 19.60 19.70 19.80 19.90 20.00 20.10 20.20 20.30 20.40 20.50 20.60 20.70 20.80 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 298P 410 410
D D
A A
O O
R R
400 IL IL 400
A A
R R
T
M
E E
E
A
E
IN IN
D
R
A A
T
T
T
S
M M
O
L
D D
B
L
I
N N
B
M
A
A A
S
N N
390 390 R
E
O O
E
T T
IL
S S
IV
O O
F
R
B B
O
K
N
O
R
A
O
R
G
P
E
B
D
Y 380 380 H
N
O
U
O
T
O
O
S S
L
H
F
IT
)
8
W
8
E
C
D
N
V
E
A 370 370
U
L
(N
F
T
N
E
O
E
C
F
IN
N
IO
T 360 360
A
V
E
L
E
Y
C
N
350 350 E
G
H
A
T
, N
N
Y
E
AT T
)
M
N
S
E
N
U 340 340 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 330 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
AR AS L
CROSS SECTION LOCATION IL
A
H
R
320 E
D
20.80 20.90 21.00 21.10 21.20 21.30 21.40 21.50 21.60 21.70 21.80 21.90 22.00 22.10 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 299P 470 470
1
0
1
1
E
3
T
D
U
/
460 N 460
O
D
A
A
R
O
1
E
0
T
R
A
E 1
E
T
ID
T
S
S
U
D
H
O
E
T
N
R
U
E S
O
O
T
D
450 450 R
S
E
A
N
E
T
A
IL
S
IV
B
F
A
R
O
N
R
A
G
P
E
D
440 440 H
O
U
O
O
S
L
F
)
8
8
D
V
A 430 430
(N
T
E
E
F
IN
N
IO
T 420 420
A
V
E
L
E
Y
C
N
410 410 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 400 400 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 390 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
AU L
CROSS SECTION LOCATION IL
A
H
R
380 E
D
22.10 22.20 22.30 22.40 22.50 22.60 22.70 22.80 22.90 23.00 23.10 23.20 23.30 23.40 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 300P 510 510
K
O
O
R
Y
B
A
500 L 500
W
O
H
B
IG
M
A
H
E
G
Y
F
R
O
F
E
C
C
A
N
S
S
E
490 490 R
E
U
IS
E
L
F
IL
IV
N
F
O
R
C
O
N
R
A
G
P
E
D
480 480 H
O
U
O
O
S
L
F
)
8
8
D
V
A 470 470
(N
T
E
E
F
IN
N
IO
T 460 460
A
V
E
L
E
Y
C
N
450 450 E
G
H
A
T
, N
N
Y
E
AW T
)
M
N
S
E
N
U 440 440 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 430 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
AV L
CROSS SECTION LOCATION IL
A
H
R
420 E
D
23.40 23.50 23.60 23.70 23.80 23.90 24.00 24.10 24.20 24.30 24.40 24.50 24.60 24.70 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 301P 560 560
K
O
O
R
B
Y
D
L
U
IL
550 T 550
H
S
L
L
D
E
E
S
IL
S
A
U
T
E
R
F
D
F
O
E
O
S
C
IT 540 540 R
N E
E
E
IM
U
IL
L
L
IV
F
F
R
N
O
O
N
C
R
A
G
P
E
D
530 530 H
O
U
O
O
S
L
F
)
8
8
D
V
A 520 520
(N
T
E
E
F
IN
N
IO
T 510 510
A
V
E
L
E
Y
C
N
500 500 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 490 490 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 480 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
AX L
CROSS SECTION LOCATION IL
A
H
R
470 E
D
24.70 24.80 24.90 25.00 25.10 25.20 25.30 25.40 25.50 25.60 25.70 25.80 25.90 26.00 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 302P 740 740
B
Y
R
D
A
A
T
O
U
R
IB 735 IL 735
R
A
T
R
E
H
IT
IN
A
W
E
M
C
D
N
N
E
S
A
U
L 730 730 R
N
E
F
E
O
N
T
IL
O
IV
S
F
C
O
R
B
O
N
R
A
Y
G
P
D
E
U
D
H 725 T 725
O
U
S
D
O
O
E
S
L
IL
F
A
T
)
E
8
D
8
F
D
O
V
D
A 720 720
A
IT
O
IM
(N
R
L
T
N
E
O
E
T
F
IL
IN
W
N
D
IO
L
T 715 O 715
A
V
E
L
E
Y
C
N
710 710 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 705 705 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 700 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
AY AZ BA BB BC L
CROSS SECTION LOCATION IL
A
H
R
695 E
D
0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 E
F STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY* *LIMIT OF DETAILED STUDY IS APPROXIMATELY 940 FEET DOWNSTREAM FROM BOSTON AND MAINE RAILROAD 303P 770 770
A
Y
R
A
765 T 765
U
IB
R
T
H
IT
W
E
C
S
N
760 760 R
E
E
E
U
IL
L
IV
F
F
R
N
O
O
N
C
R
A
G
P
E
D
755 755 H
O
U
O
O
S
L
F
)
8
8
D
V
A 750 750
(N
T
E
E
F
IN
N
IO
T 745 745
A
V
E
L
E
Y
C
N
740 740 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 735 735 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 730 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
BD BE L
CROSS SECTION LOCATION IL
A
H
R
725 E
D
4400 4900 5400 5900 6400 6900 7400 7900 8400 8900 9400 9900 10400 10900 E
F STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY* *LIMIT OF DETAILED STUDY IS APPROXIMATELY 940 FEET DOWNSTREAM FROM BOSTON AND MAINE RAILROAD 304P 840 840
830 830
4
.
O
N
M
A
D
S
820 820 R
E
E
IL
IV
F
R
O
N
R
A
G
P
E
D
810 810 H
O
U
T
8
O
O
E
.
E
S
L
O
R
F
T
N
S
)
M
L
8
A
L
8
I
D
M
D
V
A 800 800
(N
1
T
.
E
O
E
N
F
M
IN
A
N
D
IO
T 790 790
A
V
E
L
E
Y
C
N
T
E
780 E 780
E
G
H
R
A
T
S
T
, N
T
N
Y
N
E
A
T
S
)
M
A
N
S
E
E
N
L
U
G
770 P 770
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 760 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
BI B
STREAM BED M
S
L
E
BF BG BH BJ BK L
CROSS SECTION LOCATION IL
A
H
R
750 E
D
6800 7300 7800 8300 8800 9300 9800 10300 10800 11300 11800 12300 12800 13300 E
F STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY* *LIMIT OF DETAILED STUDY IS APPROXIMATELY 940 FEET DOWNSTREAM FROM BOSTON AND MAINE RAILROAD 305P 900 900
K
O
O
R
890 B 890
E
C
A
N
R
U
F
H
IT
S
W
E
880 880 R
E
C
E
N
IL
E
IV
F
U
R
L
F
O
N
N
R
O
A
C
G
P
E
D
870 870 H
O
U
O
O
S
L
F
)
8
8
D
V
A 860 860
(N
T
E
E
F
IN
N
IO
T 850 850
A
V
E
L
E
Y
C
N
840 840 E
G
H
A
T
, N
N
Y
E
BO T
)
M
N
S
E
N
U 830 830 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD** D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD** O
L
E
L 820 R
G
(A
O 10% ANNUAL CHANCE FLOOD** R
E
B
STREAM BED M
S
L
E
BL BM BN L
CROSS SECTION LOCATION IL
A
H
**DATA NOT AVAILABLE R
810 E
D
9300 9800 10300 10800 11300 11800 12300 12800 13300 13800 14300 14800 15300 15800 E
F STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY* *LIMIT OF DETAILED STUDY IS APPROXIMATELY 940 FEET DOWNSTREAM FROM BOSTON AND MAINE RAILROAD 306P 900 900
Y
D
U
890 T 890
S
D
E
IL
A
T
E
D
F
O
S
880 880 R
IT
E
E
IM
IL
L
IV
F
R
O
N
R
A
G
P
E
D
870 870 H
O
U
O
O
S
L
F
)
8
8
D
V
A 860 860
(N
T
E
E
F
IN
N
IO
T 850 850
A
V
E
L
E
Y
C
N
840 840 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 830 830 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD** D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD** O
L
E
L 820 R
G
(A
O 10% ANNUAL CHANCE FLOOD** R
E
B
STREAM BED M
S
L
E
BP BQ L
CROSS SECTION LOCATION IL
A
**DATA NOT AVAILABLE H
R
810 E
D
15800 16300 16800 17300 17800 18300 18800 19300 19800 20300 20800 21300 21800 22300 E
F STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY* *LIMIT OF DETAILED STUDY IS APPROXIMATELY 940 FEET DOWNSTREAM FROM BOSTON AND MAINE RAILROAD 307P 970 970 WATER LOOM POND
Y
D
D
U
A 960 T 960
O
S
R
D
B
E
U
IL
L
A
C
T
Y
E
R
D
T
F
N
O
U
S
O
IT
950 950 R
E
C
E
IM
IL
L
IV
F
R
O
N
R
A
G
P
E
D
940 940 H
O
U
O
O
S
L
F
)
8
8
D
V
A 930 930
(N
T
E
E
F
IN
N
IO
T 920 920
A
V
E
L
E
Y
C
N
910 910 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 900 900 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD** D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD** O
L
E
L 890 R
G
(A
O 10% ANNUAL CHANCE FLOOD** R
E
B
STREAM BED M
S
L
E
BR L
CROSS SECTION LOCATION IL
A
**DATA NOT AVAILABLE H
R
880 E
D
20700 21200 21700 22200 22700 23200 23700 24200 24700 25200 25700 26200 26700 27200 E
F STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY* *LIMIT OF DETAILED STUDY IS APPROXIMATELY 940 FEET DOWNSTREAM FROM BOSTON AND MAINE RAILROAD 308P 970 970 WATER LOOM POND
Y
D
U
960 T 960
S
D
D
A
E
O
IL
R
A
Y
T
B
E
H
D
S
F
A
O
S
IT
950 950 R
E
E
IM
L
IL
IV
F
R
O
N
R
A
G
P
E
D
940 940 H
O
U
O
O
S
L
F
)
8
8
D
V
A 930 930
(N
T
E
E
F
IN
N
IO
T 920 920
A
V
E
L
E
Y
C
N
910 910 E
G
H
A
T
, N
N
Y
E
BW BX T
)
M
N
S
E
N
U 900 900 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD** D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD** O
L
E
L 890 R
G
(A
O 10% ANNUAL CHANCE FLOOD** R
E
BV B
STREAM BED M
S
L
E
BS BT BU L
CROSS SECTION LOCATION IL
A
**DATA NOT AVAILABLE H
R
880 E
D
27200 27700 28200 28700 29200 29700 30200 30700 31200 31700 32200 32700 33200 33700 E
F STREAM DISTANCE IN FEET ABOVE LIMIT OF DETAILED STUDY* *LIMIT OF DETAILED STUDY IS APPROXIMATELY 940 FEET DOWNSTREAM FROM BOSTON AND MAINE RAILROAD 309P 320 320
R
E
IV
R
G
315 O 315
U
Q
R
A
E
T
V
A
I
C
R
IS
G
P
T
O
S
A 310 310 U
E
H
Q
T
A
IL
U
O
T
F
M
A
O
C
R
IS
P
P
D 305 305 H
C
O
N
O
A
L
R
F
B
)
8
H
8
T
D
U
V
O
A 300 300
S
(N
T
E
E
F
IN
N
IO
T 295 295
A
V
E
L
E
Y
C
N
290 290 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 285 285 G
IO
A
O
T LEGEND N
C IC 0.2% ANNUAL CHANCE FLOOD A
ID
H
M
S
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 280 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
A B L
CROSS SECTION LOCATION IL
A
H
R
275 E
D
0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 1.10 1.20 1.30 E
F STREAM DISTANCE IN MILES ABOVE MOUTH 310P 335 335
330 330
R
E
V
I
R
G
O
S 325 325 U
E
Q
A
IL
T
F
A
O
C
R
IS
P
P
D 320 320 H
C
O
N
O
A
L
R
F
B
)
8
H
8
T
D
U
V
O
A 315 315
S
(N
T
E
E
F
IN
N
IO
T 310 310
A
V
E
L
E
)
D
A
O
Y
R
C
R
N
O
T 305 305 E
C
D
G
H
E
A
N A
O
N
T
, N
R O
R
N
C
Y
E
E
3
K
E T
1
R )
M
E
N
A
S
E
T
P
N
U
U 300 300 G
O
IO
A
O
R T
N
E LEGEND
C IC
T A
A 0.2% ANNUAL CHANCE FLOOD
ID
H
T
M
S
G
(S
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 295 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
C D L
CROSS SECTION LOCATION IL
A
H
R
290 E
D
1.11 1.21 1.31 1.41 1.51 1.61 1.71 1.81 1.91 2.01 2.11 2.21 2.31 2.41 E
F STREAM DISTANCE IN MILES ABOVE MOUTH 311P 355 355
350 350
R
E
V
I
R
G
O
S 345 345 U
E
Q
A
IL
T
F
A
O
C
R
IS
P
P
D 340 340 H
C
O
N
O
A
L
R
F
B
)
8
H
8
T
D
U
V
O
A 335 335
S
(N
T
E
E
F
H
C
IN
N
N
A
R
IO
R
T
E 330 B D 330
E
A
A
IV
L
V
O
E
D R
R
L
G
ID
E
L
O
IL
U
M
F
Q
M
A
O
G
Y
T
E
G
C
A
C
E
C
N
N
R
E
IS
E 325 G 325
U
P
G
H
L
F
A
N
O
T
, N
C
N
Y
E
G T
)
M
N
S
E
N
U 320 320 G
IO
A
O
T LEGEND N
C IC 0.2% ANNUAL CHANCE FLOOD A
ID
H
M
S
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 315 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
F L
CROSS SECTION LOCATION IL
A
H
R
310 E
D
2.30 2.40 2.50 2.60 2.70 2.80 2.90 3.00 3.10 3.20 3.30 3.40 3.50 3.60 E
F STREAM DISTANCE IN MILES ABOVE MOUTH 312P 380 380
375 375
R
E
V
I
R
G
O
S 370 370 U
E
Q
A
IL
T
F
A
O
C
R
IS
P
P
D 365 365 H
C
O
N
O
A
L
R
F
B
)
8
H
8
T
D
U
V
O
A 360 360
S
(N
T
E
E
F
IN
N
IO
T 355 355
A
V
E
L
E
Y
C
N
350 350 E
G
H
A
T
, N
N
Y
E
I T
)
M
N
S
E
N
U 345 345 G
IO
A
O
T LEGEND N
C IC 0.2% ANNUAL CHANCE FLOOD A
ID
H
M
S
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 340 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
H L
CROSS SECTION LOCATION IL
A
H
R
335 E
D
3.60 3.70 3.80 3.90 4.00 4.10 4.20 4.30 4.40 4.50 4.60 4.70 4.80 4.90 E
F STREAM DISTANCE IN MILES ABOVE MOUTH 313P 405 405
400 400
D
A
R
O
E
R
V
E
I
L
A
R
D
L
G
IL
O
H
S 395 395 U
E
Q
A
IL
T
F
A
O
C
R
IS
P
P
D 390 390 H
C
O
N
O
A
L
R
F
B
)
8
H
8
T
D
U
V
O
A 385 385
S
(N
T
E
E
F
IN
N
IO
T 380 380
A
V
E
L
E
Y
C
N
375 375 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 370 370 G
IO
A
O
T LEGEND N
C IC 0.2% ANNUAL CHANCE FLOOD A
ID
H
M
S
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 365 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
J K L L
CROSS SECTION LOCATION IL
A
H
R
360 E
D
4.90 5.00 5.10 5.20 5.30 5.40 5.50 5.60 5.70 5.80 5.90 6.00 6.10 6.20 E
F STREAM DISTANCE IN MILES ABOVE MOUTH 314P 430 430
425 D 425
T
A
E
O
E
R
R
R
E
H
T
V
C
I
S
A
T
O R
O
P
G
C
E
D
O
D
L
S
U 420 O 420
E
Q
A
IL
T
F
A
O
C
R
IS
P
P
D 415 415 H
C
O
N
O
A
L
R
F
B
)
8
H
8
T
D
U
V
O
A 410 410
S
(N
T
E
E
F
IN
N
IO
T 405 405
A
V
E
L
E
Y
C
N
400 400 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 395 395 G
IO
A
O
T LEGEND N
C IC 0.2% ANNUAL CHANCE FLOOD A
ID
H
M
S
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 390 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
M N O L
CROSS SECTION LOCATION IL
A
H
R
385 E
D
5.70 5.80 5.90 6.00 6.10 6.20 6.30 6.40 6.50 6.60 6.70 6.80 6.90 7.00 E
F STREAM DISTANCE IN MILES ABOVE MOUTH 315P 480 480
S
R
E
M
R
D
A 470 A 470
F
O
M
K
A
R
C
R
N
D
A
E
E
O
M
V
G
IM
N
I
A
R
N
R
D
E
R
A
R
E V
H
G
C
T
M
O
X
N
D
S
E
O
U 460 E 460
E
H
M
Q
C
A
IL
A
T
E
F
R
A
O
B
C
R
IS
P
P
D 450 450 H
C
O
N
O
A
L
R
F
B
)
8
H
8
T
D
U
V
O
A 440 440
S
(N
T
E
E
F
IN
N
IO
T 430 430
A
V
E
L
E
Y
C
N
420 420 E
G
H
A
T
, N
N
Y
E
V W T
)
M
N
S
E
N
U 410 410 G
IO
A
O
T LEGEND N
C IC 0.2% ANNUAL CHANCE FLOOD A
ID
H
M
S
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 400 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
S U B
STREAM BED M
S
L
E
P Q R T L
CROSS SECTION LOCATION IL
A
H
R
390 E
D
6.21 6.31 6.41 6.51 6.61 6.71 6.81 6.91 7.01 7.11 7.21 7.31 7.41 7.51 E
F STREAM DISTANCE IN MILES ABOVE MOUTH 316P 510 510
500 D 500
A
O
R
R
E
O
V
R
I
O
B
R
E
G
D
N
O
S
Y
U 490 L 490
E
Q
A
IL
T
F
A
O
C
R
IS
P
P
D 480 480 H
C
O
N
O
A
L
R
F
B
)
8
H
8
T
D
U
V
O
A 470 470
S
(N
T
E
E
F
IN
N
IO
T 460 460
A
V
E
L
E
Y
C
N
450 450 E
G
H
A
T
, N
N
Y
E
AB T
)
M
N
S
E
N
U 440 440 G
IO
A
O
T LEGEND N
C IC 0.2% ANNUAL CHANCE FLOOD A
ID
H
M
S
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 430 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
AA B
STREAM BED M
S
L
E
X Y Z L
CROSS SECTION LOCATION IL
A
H
R
420 E
D
7.51 7.61 7.71 7.81 7.91 8.01 8.11 8.21 8.31 8.41 8.51 8.61 8.71 8.81 E
F STREAM DISTANCE IN MILES ABOVE MOUTH 317P 530 530
E
G
D
I
R
B
520 D 520
D
M
A
E
A
O
H
R
D
R
C
E
D
A
M
V
E
E
I
U
H
R
L
C
L
R
/B
A
O
D G
E
C
E
R
O
C
N
S
B
U
O 510 M 510
E
D
Q
N
A
IL
A
T
F
B
A
A
O
C
R
IS
P
P
D 500 500 H
C
O
N
O
A
L
R
F
B
)
8
H
8
T
D
U
V
O
A 490 490
S
(N
T
E
E
F
IN
N
IO
T 480 480
A
V
E
L
E
Y
C
N
470 470 E
G
H
A
T
, N
N
Y
E
AL T
)
M
N
S
E
N
U 460 460 G
IO
A
O
T LEGEND N
C IC 0.2% ANNUAL CHANCE FLOOD A
ID
H
M
S
G
AK Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L AJ E
L 450 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
AI B
STREAM BED M
S
L
E
AC AD AE AF AG AH L
CROSS SECTION LOCATION IL
A
H
R
440 E
D
8.81 8.91 9.01 9.11 9.21 9.31 9.41 9.51 9.61 9.71 9.81 9.91 10.01 10.11 E
F STREAM DISTANCE IN MILES ABOVE MOUTH 318P 540 540
D
A
530 O 530
R
M
R
H
A
G
E
D
U
V
I
E
O
N
R
R
O
O
T
B
G
S
E
O
D
S
U 520 N 520
E
Y
Q
L
A
IL
T
F
A
O
C
R
IS
P
P
D 510 510 H
C
O
N
O
A
L
R
F
B
)
8
H
8
T
D
U
V
O
A 500 500
S
(N
T
E
E
F
IN
N
IO
T 490 490
A
V
E
L
E
Y
C
N
480 480 E
G
H
A
T
, N
N
Y
E
AS T
)
M
N
S
E
N
U 470 470 G
IO
A
O
T LEGEND N
C IC 0.2% ANNUAL CHANCE FLOOD A
ID
H
M
S
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 460 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
AO AQ B
STREAM BED M
S
L
E
AM AN AP AR L
CROSS SECTION LOCATION IL
A
H
R
450 E
D
10.11 10.21 10.31 10.41 10.51 10.61 10.71 10.81 10.91 11.01 11.11 11.21 11.31 11.41 E
F STREAM DISTANCE IN MILES ABOVE MOUTH 319P 560 560
E
G
D
Y
I
D
M
D
R
A
A
U
O
B
T 550 D 550
D
E
R
S
E
L
D
IT
L
H
R
I
E
N
C
E
IL
A
A
M
V
A
R
E
I
D
T
R
L
G
E
R
IE
/B
D
D
F
E
D
G
F
R
E
H
O
E
C
N
O
S
T
U
A
O
540 IT 540
T
E
E
D
Q
U
R
N
IM
B
A
IL
B
L
A
T
F
B
A
A
O
C
R
IS
P
P
D 530 530 H
C
O
N
O
A
L
R
F
B
)
8
H
8
T
D
U
V
O
A 520 520
S
(N
T
E
E
F
IN
N
IO
T 510 510
A
V
E
L
E
Y
C
N
500 500 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 490 490 G
IO
A
O
T LEGEND N
C IC 0.2% ANNUAL CHANCE FLOOD A
ID
H
M
S
G
AW Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L AV E
L 480 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
AU AY B
STREAM BED M
S
L
E
AT AX AZ BA BB L
CROSS SECTION LOCATION IL
A
H
R
470 E
D
11.41 11.51 11.61 11.71 11.81 11.91 12.01 12.11 12.21 12.31 12.41 12.51 12.61 12.71 E
F STREAM DISTANCE IN MILES ABOVE MOUTH 320P 150 150 1% ANNUAL CHANCE BACKWATER FROM MERRIMACK RIVER
140 140 HAMPSHIRE CHEMICAL COMPANY CULVERT
130 130 S
E
D
A
IL
O
K
R
F
O
IL
O
O
A
R
R
R
M
B
P
&
T
I
B
D
120 120 P
O
S
O
L
F
)
8
8
D
V
A 110 110
(N
T
E
E
F
IN
N
IO
T 100 100
A
V
E
L
E
Y
C
N
90 90 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U
R
H 80 80 G
E
IO
IT
A
O
IV
T
W
N
LEGEND
R
E
C IC
A
K
C 0.2% ANNUAL CHANCE FLOOD D
C
H
N
M
A
IS
E
G
Y
U
R
IM 1% ANNUAL CHANCE FLOOD
L
C
U
U
R
F
R
N
N
J
O
E 2% ANNUAL CHANCE FLOOD
O
L
E
L
R
M 70 C
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
L
CROSS SECTION LOCATION IL
A
H
R
60 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 MERRIMACK RIVER 321P 170 170
E
160 IV 160
3
R
E
D
T
T
U
S
O
E
R
R
E
C
T
L
A
A T DAM
Y
S
S 150 O 150
E
R
IL
K
F
O
O
O
R
R
B
P
CULVERT T
I
D
140 140 P
O
S
O
L
F
)
8
8
D
V
A 130 130
(N
T
E
E
F
IN
N
IO CULVERT T 120 120
A
V
E
L
E
Y
C
N
110 110 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 100 100 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 90 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
A B L
CROSS SECTION LOCATION IL
A
H
R
80 E
D
1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 2600 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MERRIMACK RIVER 322P 220 220
Y
D
U
E
T
210 IV 210
S
R
D
D
E
T
IL
S
A
E
T
R
E
C
D
L
F
A
Y
O
S
O
200 IT 200
E
R
IM
IL
L
K
F
O
O
O
R
R
B
P
T
I
D
190 190 P
O
S
O
L
F
)
8
8
D
V
A 180 180
(N
T
E
E
F
IN
N
IO
T 170 170
A
V
E
L CULVERT
E
Y
C
N
160 160 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 150 150 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 140 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
C L
CROSS SECTION LOCATION IL
A
H
R
130 E
D
2500 2600 2700 2800 2900 3000 3100 3200 3300 3400 3500 3600 3700 3800 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MERRIMACK RIVER 323P 375 375
E
G
R
ID
E
370 R 370
IV
B
R
T
N
E
A E
M
R
G
A
E
T
D
H
S
U
D
O
N
S
A
S
L 365 H 365
E
H
IT
K
IG
IL
W
H SPILLWAY O
E
F
O
C
O
R
N
E
R
U
B
L
Y
F
P
N
N
D
O 360 360 O
C
O
T
S
O
L
F
)
8
8
D
V
A 355 355
(N
T
E
E
F
IN
N
IO
T 350 350
A
V SPILLWAY
E
L
E
M
A
D
Y
C
N
345 345 E
G
H
A
B T
, N
N
Y
E
T
)
M
S
N
E
N
U 340 340 G
IO
A
O
IT LEGEND N
C
A 0.2% ANNUAL CHANCE FLOOD IC
H
ID
M
S
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
335 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M A S
L
E
L
CROSS SECTION LOCATION IL
A
H
R
330 E
D
0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 E
F STREAM DISTANCE IN FEET ABOVE SOUHEGAN RIVER 324P 400 400
395 395
390 390 S
E
K
IL
O
F
O
O
R
R
B
Y
P
N
D
385 385 O
O
T
S
O
L
F
)
8
8
D
V
A 380 380
(N
T
E
E
F
IN
N
IO
T 375 375
A
V
E
L
E
Y
C
N
370 370 E
G
H
A
T
, N
N
Y
E
T
)
M
S
N
E
N
U 365 365 G
IO
A
O
IT LEGEND N
C
A 0.2% ANNUAL CHANCE FLOOD IC
H
ID
M
S
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
360 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
C L
CROSS SECTION LOCATION IL
A
H
R
355 E
D
2200 2400 2600 2800 3000 3200 3400 3600 3800 4000 4200 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SOUEGAN RIVER 325P 430 430
425 425
420 420 S
E
K
IL
O
F
O
O
R
R
B
Y
P
N
D
415 415 O
O
T
S
O
L
F
)
8
8
D
V
A 410 410
(N
T
E
E
F
IN
N
K
IO
O
T
405 O 405
A
R
V
E
B
L
M
E
A
D
R
Y
E
V
C
A
N
E
400 400 E
B
G F
H
A
O
E
T
C
, N
N
N
Y
E
E
U
T
L
)
M
F
S
N
E
N
N
O
U 395 395 G
C
IO
A
O
IT LEGEND N
C
A 0.2% ANNUAL CHANCE FLOOD IC
H
ID
M
S
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
390 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
L
CROSS SECTION LOCATION IL
A
H
R
385 E
D
4200 4400 4600 4800 5000 5200 5400 5600 5800 6000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SOUHEGAN RIVER 326P 455 455
450 450
M
A
D
D
E
H
C
A
E
R
B
S
445 E 445
E
E
IN
K
G
IL
A
O
ID
F
M
R
O
D
O
R
B
N
D
R
B
A
A
O
Y
N
P
R
O
N
T
IL
D
O
S
440 A 440
O
O
T
R
B
S
O
L
F
)
8
8
D
V
A 435 435
(N
T
E
E
F
IN
N
IO
T 430 430
A
V
E
L
E
Y
C
N
425 425 E
G
H
A
T
, N
N
Y
E
T
)
M
S
N
E
N
U 420 420 G
IO
A
O
IT LEGEND N
C
A 0.2% ANNUAL CHANCE FLOOD IC
H
ID
M
S
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
415 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
D L
CROSS SECTION LOCATION IL
A
H
R
410 E
D
6000 6200 6400 6600 6800 7000 7200 7400 7600 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SOUHEGAN RIVER 327P 470 470
K
O
O
R
465 D 465
B
A
L
O
IL
R
M
D
L
H
IE
IT
F
N
W
E
E
E
C
R
S
N
460 G 460
E
E
U
K
L
IL
F
O
F
N
O
O
O
R
C
R
B
Y
P
N
D
455 455 O
O
T
S
O
L
F
)
8
8
D
V
A 450 450
(N
T
E
E
F
IN
N
IO
T 445 445
A
V
E
L
E
Y
C
N
440 440 E
G
H
A
T
, N
N
Y
E
T
)
M
S
N
E
N
U 435 435 G
IO
A
O
IT LEGEND N
C
A 0.2% ANNUAL CHANCE FLOOD IC
H
ID
M
S
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
430 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
E F L
CROSS SECTION LOCATION IL
A
H
R
425 E
D
7600 7800 8000 8200 8400 8600 8800 9000 9200 9400 9600 9800 10000 10200 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SOUGHEGAN RIVER 328P 500 500
E
G
495 ID 495
R
B
D
A
O
R
IT
P
L
S
E
490 V 490
E
A
K
R
IL
O
G
F
O
O
R
R
B
Y
P
N
D
485 485 O
O
T
S
O
L
F
)
8
8
D
V
A 480 480
(N
T
E
E
F
IN
N
IO
T 475 475
A
V
E
L
E
Y
C
N
470 470 E
G
H
A
T
, N
N
Y
E
H T
)
M
S
N
E
N
U 465 465 G
IO
A
O
IT LEGEND N
C
A 0.2% ANNUAL CHANCE FLOOD IC
H
ID
M
S
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
460 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
G L
CROSS SECTION LOCATION IL
A
H
R
455 E
D
10200 10400 10600 10800 11000 11200 11400 11600 11800 12000 12200 12400 12600 12800 E
F STREAM DISTANCE IN FEET ABOVE COMFLUENCE WITH SOUHEGAN RIVER 329P 520 520
T
R
E
V
L
U
C
D
A
O
515 R 515
T
S
E
R
O
F
510 510 S
E
K
IL
O
F
O
O
R
R
B
Y
P
N
D
505 505 O
O
T
S
O
L
F
)
8
8
D
V
A 500 500
(N
T
E
E
F
IN
N
IO
T 495 495
A
V
E
L
E
Y
C
N
490 490 E
G
H
A
T
, N
N
Y
E
I T
)
M
S
N
E
N
U 485 485 G
IO
A
O
IT LEGEND N
C
A 0.2% ANNUAL CHANCE FLOOD IC
H
ID
M
S
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
480 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
L
CROSS SECTION LOCATION IL
A
H
R
475 E
D
12800 13000 13200 13400 13600 13800 14000 14200 14400 14600 14800 15000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SOUHEGAN RIVER 330P 545 545
Y
D
U
T
540 S 540
D
E
IL
A
T
E
D
F
O
T
I 535 535 S
IM
E
L
K
IL
O
F
O
O
R
R
B
Y
P
N
D
530 530 O
O
T
S
O
L
F
)
8
8
D
V
A 525 525
(N
T
E
E
F
IN
N
IO
T 520 520
A
V
E
L
E
Y
C
N
515 515 E
G
H
A
T
, N
N
Y
E
T
)
M
S
N
E
N
U 510 510 G
IO
A
O
IT LEGEND N
C
A 0.2% ANNUAL CHANCE FLOOD IC
H
ID
M
S
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
505 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
J L
CROSS SECTION LOCATION IL
A
H
R
500 E
D
14900 15100 15300 15500 15700 15900 16100 16300 16500 16700 16900 17100 17300 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SOUHEGAN RIVER 331P 834 834
S
IT
M
I
L
E
T
Y
A
D
R
U
O 832 T 832
P
S
R
D
M
O
E
A
C
IL
D
D
A
L
L
T
L
E
IE
A
F
D
M
N
F
S
E
E
O
S
830 R 830
IT
E
/G
K
IM
H
IL
L
O
G
F
U
O
O
O
R
R
R
O
B
B
Y
E
P
D
N
D
N 828 828 O
Y
O
T
L
S
O
L
F
)
8
8
D
V
A 826 826
(N
T
E
E
F
IN
N
IO
T 824 824
A
V
E
L E SPILLWAY ELEVATION 823.2
Y
C
N
822 822 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 820 820 G
IO
A
O
T LEGEND N
C IC 0.2% ANNUAL CHANCE FLOOD A
ID
H
M
S
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 818 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
K L
CROSS SECTION LOCATION IL
A
H
R
816 E
D
-600 -400 -200 0 200 400 600 800 1000 1200 1400 1600 1800 2000 E
F STREAM DISTANCE IN FEET ABOVE TOWN OF LYNDEBOROUGH/GREENFIELD CORPORATE LIMITS 332P 840 840
E
G
ID 838 R 838
B
D
A
O
R
E
S
U
O
H
L
S
836 O 836
E
O
K
H
IL
C
O
S
F
O
O
R
R
B
Y
P
N
D
834 834 O
O
T
S
O
L
F
)
8
8
D
V
A 832 832
(N
T
E
E
F
IN
N
IO
T 830 830
A
V
E
L
E
Y
C
N
828 828 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 826 826 G
IO
A
O
T LEGEND N
C IC 0.2% ANNUAL CHANCE FLOOD A
ID
H
M
S
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 824 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
L L
CROSS SECTION LOCATION IL
A
H
R
822 E
D
1600 1800 2000 2200 2400 2600 2800 3000 3200 3400 3600 3800 4000 4200 E
F STREAM DISTANCE IN FEET ABOVE TOWN OF LYNDEBOROUGH/GREENFIELD CORPORATE LIMITS 333P 843 843
841 841
839 839 S
E
K
IL
O
F
O
O
R
R
B
Y
P
N
D
837 837 O
O
T
S
O
L
F
)
8
8
D
V
A 835 835
(N
T
E
E
F
IN
N
IO
T 833 833
A
V
E
L
E
Y
C
N
831 831 E
G
H
A
C
Y
T
, N
R
N
A
Y
E
T
T
U
)
M
IB
N
S
E
R
N
U
G
E
T
829 T 829
R
IO
F A
IN
O
E
T
A
N
O V LEGEND
E
L
M
C IC
A
C
U
D 0.2% ANNUAL CHANCE FLOOD
N
ID
H
C
N
M E
S
D
G
U
Y
A
R
A L 1% ANNUAL CHANCE FLOOD
N
C
F U
U
O
O
N
R
N
J
O
T
O 2% ANNUAL CHANCE FLOOD IL
L
E
S
C
L
A 827 R
O
G
R
B
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
M L
CROSS SECTION LOCATION IL
A
H
R
825 E
D
2400 2600 2800 3000 3200 3400 3600 3800 4000 4200 4400 4600 4800 5000 E
F STREAM DISTANCE IN FEET ABOVE TOWN OF LYNDEBOROUGH/GREENFIELD CORPORATE LIMITS 334P 845 845
Y
E
N
D
T
IN
IO
U
R
A
T
T
E
D
A
V
S
A
M
T
L
D
O
D
U
E
S
R
N
L
C
IL
IL
L
A
D
A
E
A
N
T
A
S
R
O
E
O
S
T
R
U
843 D 843
S
F
R
O
O
B
T
I
IM
L
841 841 S
E
K
IL
O
F
O
O
R
R
B
Y
P
N
D
839 839 O
O
T
S
O
L
F
)
8
8
D
V
A 837 837
(N
T
E
E
F
IN
N
IO
T 835 835
A
V
E
L
E
Y
C
N
833 833 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 831 831 G
IO
A
O
T LEGEND N
C IC 0.2% ANNUAL CHANCE FLOOD A
ID
H
M
S
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 829 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
N L
CROSS SECTION LOCATION IL
A
H
R
827 E
D
4400 4600 4800 5000 5200 5400 5600 5800 6000 6200 6400 6600 6800 7000 E
F STREAM DISTANCE IN FEET ABOVE TOWN OF LYNDEBOROUGH/GREENFIELD CORPORATE LIMITS 335P 1% ANNUAL CHANCE BACKWATER FROM MERRIMACK RIVER
R
E
IV
R
K
150 C 150
A
IM
R
R
E
M
H
IT
S
145 W 145
E
E
C
IL
R
N
E
E
F
U
L
O IV
F
N
R
R
O
A
C
P
G
D
140 140 IO
O
T
O
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
Y
C
N
125 125 E
G
H
A
T
, N
N
Y
E
T
)
M
S
N
E
N
U 120 120 G
IO
A
O
T
LEGEND N
IC
C
A
0.2% ANNUAL CHANCE FLOOD ID
H
M
IS
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
115 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
A L
CROSS SECTION LOCATION IL
A
H
R
110 E
D
0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20 0.22 0.24 0.26 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 336P S
E
IL
R
E
F
O IV
R
R
A
P
G
D
160 160 IO
O
T
O
L
F
)
8
8
D
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
H
A
T
, N
N
Y
E
T
)
M
S
N
E
N
U 140 140 G
IO
A
O
T
LEGEND N
IC
C
A
0.2% ANNUAL CHANCE FLOOD ID
H
M
IS
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
135 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
B L
CROSS SECTION LOCATION IL
A
H
R
130 E
D
0.26 0.28 0.30 0.32 0.34 0.36 0.38 0.40 0.42 0.44 0.46 0.48 0.50 0.52 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 337P 185 185 TOP OF CULVERT=193.9
180 180
D
A
O
R
T
IR
D
175 175 S
E
IL
R
E
F
O IV
R
R
A
P
G
D
170 170 IO
O
T
O
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 CULVERT
Y
C
N
155 155 E
G
H
A
T
, N
N
Y
E
T
)
M
S
N
T
E
N
T
T
U
G
E
150 R 150
IO
R
A
E
O
T
E
V
N
V
L LEGEND
IC
C
A
U
. E .
0.2% ANNUAL CHANCE FLOOD ID
C
H
E
E
M
K
IS
G
Y
IK
1% ANNUAL CHANCE FLOOD R
IC
P
C
U
U
R
N
E
N
O
R
J
D 2% ANNUAL CHANCE FLOOD
E
L
U
E
145 R
L
T
G
R
A
F
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
C D L
CROSS SECTION LOCATION IL
A
H
R
140 E
D
0.52 0.54 0.56 0.58 0.60 0.62 0.64 0.66 0.68 0.70 0.72 0.74 0.76 0.78 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 338P 205 205
200 200
195 195 S
E
IL
R
E
F
O IV
R
R
A
P
G
D
E
190 190 IO
O
G
T
ID
O
R
L
B
F
N
E
)
D
8
8
O
O
D
V
W
A 185 185
(N
T
E
E
F
IN
Y
N
A
IO
W
T
180 H 180
A
IG
V
3
E
H
E
L
T
R
E
E
U
T
O
S
B
. R .
Y
E
.S
C
U
W
N
L
175 175 E
IE
G
N
H
A
A
D
T
, N
N
Y
E
G T
)
M
S
N
E
N
U 170 170 G
IO
A
O
T
LEGEND N
IC
C
A
0.2% ANNUAL CHANCE FLOOD ID
H
M
IS
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
165 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
E F L
CROSS SECTION LOCATION IL
A
H
R
160 E
D
0.78 0.80 0.82 0.84 0.86 0.88 0.90 0.92 0.94 0.96 0.98 1.00 1.02 1.04 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 339P S
E
IL
R
E
F
O IV
R
R
A
P
G
D
205 205 IO
O
T
O
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
H
A
T
, N
N
Y
E
T
)
M
S
N
E
N
U 185 185 G
IO
A
O
T
LEGEND N
IC
C
A
0.2% ANNUAL CHANCE FLOOD ID
H
M
IS
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
180 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
L
CROSS SECTION LOCATION IL
A
H
R
175 E
D
1.04 1.06 1.08 1.10 1.12 1.14 1.16 1.18 1.20 1.22 1.24 1.26 1.28 1.30 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 340P E
S
R
U
O
D
A
C
F
O
L
R
O
T
G
IR
T
D
A
S
M
A
E
D
IL
R
E
F
O IV
R
R
A
P
G
D
210 210 IO
O
T
O
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
H
A
T
, N
N
Y
E
E
J T
S
)
M
R
S
N
E
U
N
O
U 190 190 G
IO
C
A
O
F
T
L LEGEND N
O
IC
C
A
G
0.2% ANNUAL CHANCE FLOOD ID
H
T
M
IS
G
A
Y
R
E 1% ANNUAL CHANCE FLOOD
C
U
U
G
N
O
ID 2% ANNUAL CHANCE FLOOD J
E
L
R
185 R
L
B
G
T
A
O
R
10% ANNUAL CHANCE FLOOD (
O
E
B
O
F
STREAM BED M
S
L
E
H I L
CROSS SECTION LOCATION IL
A
H
R
180 E
D
1.30 1.33 1.35 1.37 1.39 1.41 1.43 1.45 1.47 1.49 1.51 1.53 1.55 1.57 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 341P D
A
O
R
N
O
T
T
A
P 215 215 S
E
IL
R
E
F
O IV
R
R
A
P
G
D
210 210 IO
O
T
O
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
H
A
T
, N
N
Y
E
T
)
M
S
N
E
N
U 190 190 G
IO
A
O
T
LEGEND N
IC
C
A
0.2% ANNUAL CHANCE FLOOD ID
H
M
IS
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
185 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
K L
CROSS SECTION LOCATION IL
A
H
R
180 E
D
1.57 1.59 1.61 1.63 1.65 1.67 1.69 1.71 1.73 1.75 1.77 1.79 1.81 1.83 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 342P S
E
IL
R
E
F
O IV
R
R
A
P
G
D
215 215 IO
O
T
O
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
H
A
T
, N
N
Y
E
T
)
M
S
N
E
N
U 195 195 G
IO
A
O
T
LEGEND N
IC
C
A
0.2% ANNUAL CHANCE FLOOD ID
H
M
IS
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
190 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
L
CROSS SECTION LOCATION IL
A
H
R
185 E
D
1.83 1.85 1.87 1.89 1.91 1.93 1.95 1.97 1.99 2.01 2.03 2.05 2.07 2.09 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 343P Y
D
U
E
T
IV
S
R
D
E
D
E
IL
E
A
F
T
O
E
D
G
N
F
H
O
S
O
IT
J
E
IM
IL
R
L
E
F
O IV
R
R
A
P
G
D
220 220 IO
O
T
O
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
H
A
T
, N
N
Y
E
T
)
M
S
N
E
N
U 200 200 G
IO
A
O
T
LEGEND N
IC
C
A
0.2% ANNUAL CHANCE FLOOD ID
H
M
IS
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
195 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
L L
CROSS SECTION LOCATION IL
A
H
R
190 E
D
2.09 2.11 2.13 2.15 2.17 2.19 2.21 2.23 2.25 2.27 2.29 E
F STREAM DISTANCE IN MILES ABOVE CONFLUENCE WITH MERRIMACK RIVER 344P 770 770 1% ANNUAL CHANCE BACKWATER EFFECTS FROM SOUHEGAN RIVER
R
E
Y
IV
D
R
U
T
D 765 N 765
A
A
S
T
O
G
D
E
E
E
R
E
H
IL
N
R
U
A
T
O
O
T
S
S
E
S
A
L
T
D
IL
M
F
A
M
D
H
O
L
S
T
T
O
760 I 760
E
U
O
IM
IL
L
A
M
F
Y
R
O
A
R
T
U
P
D 755 755 IB
R
O
T
O
L
F
)
8
8
D
V
A 750 750
(N
T
E
E
F
IN
N
IO
T 745 745
A
V
E
L
E
Y
C
N
740 740 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 735 735 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 730 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
A B C D E F L
CROSS SECTION LOCATION IL
A
H
R
725 E
D
0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 E
F STREAM DISTANCE IN FEET ABOVE MOUTH AT SOUHEGAN RIVER 345P 195 195
K
O
O
R
B
E 190 E 190
S
N
A
A
D
H
L
A
C
Y
O
H R
R
R
IT
E
E
G
B
W
A
N
E
P
A
C
R
N
S
C 185 E 185
. 1
E
U
L
O
F
IL
N
N
F
O
C O
B
Y
R
R
P
A
T
D
180 180 U
O
IB
O
R
L
T
F
)
8
8
D
V
A 175 175
(N
T
E
E
F
IN
N
IO
T 170 170
A
V
E CULVERT
L
E CULVERT
Y
C
N
165 165 E
G
H
A
T
, N
N
Y
E
E F T
)
M
N
S
E
N
U 160 160 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 155 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
A B C D L
CROSS SECTION LOCATION IL
A
H
R
150 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 CHASE BROOK 346P 215 215
210 2 210
0
1
E
T
U
O
R
E
T
A
T
S
205 S 205
E
. 1
O
IL
F
N
O
B
Y
R
R
Y
P
D
A
U
T
D 200 T 200
U
O
S
D
IB
O
E
R
L
IL
T
A
F
T
)
E
8
D
8
F
D
O
V
IT
A 195 195
IM
(N
L
T
E
E
F
IN
N
IO
T 190 190
A
V CULVERT
E
L
E
Y
C
N
185 185 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 180 180 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 175 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
G L
CROSS SECTION LOCATION IL
A
H
R
170 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 CHASE BROOK 347P 828 828
S
IT
M
I
L
E
T
A
R
O
P
R
826 1 826
O
D
3
C
E
A
D
T
O
L
U
R
IE
O
T
F
S
R
N
E
E
E
R T
E
O A
R
F
T
S
/G 824 S 824
H
. 2
E
G
O
U
IL
O
N
F
R
O
O
B
B
Y
R
E
R
D
N
P
A
Y
T
L
D
822 822 U
O
IB
O
R
L
T
F
)
8
8
D
V
A 820 820
(N
T
E
E
F
IN CULVERT
N
IO
T 818 818
A
V
E
L
E
Y
C
N
816 816 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 814 814 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 812 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
A L
CROSS SECTION LOCATION IL
A
H
R
810 E
D
0 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20 0.22 0.24 0.26 E
F STREAM DISTANCE IN MILES ABOVE TOWN OF LYNDEBOROUGH/GREENFIELD CORPORATE LIMITS 348P 834 834
832 832
830 830 S
. 2
E
O
IL
N
F
O
B
Y
R
R
P
A
T
D
828 828 U
O
IB
O
R
L
T
F
)
8
8
D
V
A 826 826
(N
T
E
E
F
IN
N
IO
T 824 824
A
V
E
L
E
Y
C
N
822 822 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 820 820 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 818 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
L
CROSS SECTION LOCATION IL
A
H
R
816 E
D
0.26 0.28 0.30 0.32 0.34 0.36 0.38 0.40 0.42 0.44 0.46 0.48 0.50 0.52 E
F STREAM DISTANCE IN MILES ABOVE TOWN OF LYNDEBOROUGH/GREENFIELD CORPORATE LIMITS 349P 842 842
840 840
838 838 S
. 2
E
O
IL
N
F
O
B
Y
R
R
P
A
T
D
836 836 U
O
IB
O
R
L
T
F
)
8
8
D
V
A 834 834
(N
T
E
E
F
IN
N
IO
T 832 832
A
V
E
L
E
Y
C
N
830 830 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 828 828 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 826 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
L
CROSS SECTION LOCATION IL
A
H
R
824 E
D
0.52 0.54 0.56 0.58 0.60 0.62 0.64 0.66 0.68 0.70 0.72 0.74 0.76 0.78 E
F STREAM DISTANCE IN MILES ABOVE TOWN OF LYNDEBOROUGH/GREENFIELD CORPORATE LIMITS 350P 850 850
848 848
846 846 S
. 2
E
O
IL
N
F
O
B
Y
R
R
P
A
T
D
844 844 U
O
IB
O
R
L
T
F
)
8
8
D
V
A 842 842
(N
T
E
E
F
IN
N
IO
T 840 840
A
V
E
L
E
Y
C
N
838 838 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 836 836 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 834 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
B L
CROSS SECTION LOCATION IL
A
H
R
832 E
D
0.78 0.80 0.82 0.84 0.86 0.88 0.90 0.92 0.94 0.96 0.98 1.00 1.02 1.04 E
F STREAM DISTANCE IN MILES ABOVE TOWN OF LYNDEBOROUGH/GREENFIELD CORPORATE LIMITS 351P 857 857
855 855
853 853 S
. 2
E
O
IL
N
F
O
B
Y
R
R
P
A
T
D
851 851 U
O
IB
O
R
L
T
F
)
8
8
D
V
A 849 849
(N
T
E
E
F
IN
N
IO
T 847 847
A
V
E
L
E
Y
C
N
845 845 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 843 843 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 841 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
L
CROSS SECTION LOCATION IL
A
H
R
839 E
D
0.90 0.92 0.94 0.96 0.98 1.00 1.02 1.04 1.06 1.08 1.10 1.12 1.14 1.16 E
F STREAM DISTANCE IN MILES ABOVE TOWN OF LYNDEBOROUGH/GREENFIELD CORPORATE LIMITS 352P 865 865
Y
D
U
863 T 863
S
D
D
A
E
O
IL
R
A
R
T
E
E
D
N
I
F
M
O
S
861 IT 861
. 2
E
O
IM
IL
L
N
F
O
B
Y
R
R
P
A
T
D
859 859 U
O
IB
O
R
L
T
F
)
8
8
D
V
A 857 857
(N
T
E
E
F
IN
N
IO
T 855 855
A
V
E
L
E
Y
C
N
853 853 E
G
H
A
T
, N
N
Y
E
T
)
M
N
S
E
N
U 851 851 G
IO
A
O
T LEGEND N
C IC
A
0.2% ANNUAL CHANCE FLOOD D
H
M
IS
G
Y 1% ANNUAL CHANCE FLOOD R
C
U
U
N
J 2% ANNUAL CHANCE FLOOD O
L
E
L 849 R
G
(A
O 10% ANNUAL CHANCE FLOOD R
E
B
STREAM BED M
S
L
E
C L
CROSS SECTION LOCATION IL
A
H
R
847 E
D
0.98 1.00 1.02 1.04 E
F STREAM DISTANCE IN MILES ABOVE TOWN OF LYNDEBOROUGH/GREENFIELD CORPORATE LIMITS 353P 275 275 FLOODING CONTROLLED BY SOUHEGAN RIVER
H
270 R 270
E
IT
IV
W
E
R
C
N
N
A
E
G
U
E
L
H
F
U
N
O
S
O
S
265 C 265
E
K
IL
O
F
O
R
O
B
R
R
P
E
K
D
260 260 C
O
U
O
T
L
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
H
A A
T
, N
N
Y
E
T
)
M
S
N
E
N
U 240 240 G
IO
A
O
T
LEGEND N
IC
C
A
0.2% ANNUAL CHANCE FLOOD ID
H
M
IS
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
235 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
L
CROSS SECTION LOCATION IL
A
H
R
230 E
D
0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SOUHEGAN RIVER 354P 280 280 FLOODING CONTROLLED BY SOUHEGAN RIVER
1
275 0 275
1
E
T
U
O
R
E
T
A
T
S 270 S 270
E
K
IL
O
F
O
R
O
B
R
R
P
E
K
D
265 265 C
O
U
O
T
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
H
CULVERT A
T
, N
N
Y
E
T
)
C M
S
N
E
N
U 245 245 G
IO
A
O
T
LEGEND N
IC
C
A
0.2% ANNUAL CHANCE FLOOD ID
H
M
IS
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
240 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
B L
CROSS SECTION LOCATION IL
A
H
R
235 E
D
2600 2800 3000 3200 3400 3600 3800 4000 4200 4400 4600 4800 5000 5200 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SOUHEGAN RIVER 355P 280 280
D
A
D
O
A
R
O
IL
R
275 A 275
S
D
R
S
A
E
E
O
C
IN
C
R
A
L
A
E
M
V
IT
D
A
P
N
R
L
G
A
E
S
V 270 N 270
A
E
O
K
R
T
S
G
IL
O
O
F
O
B
R
O
B
R
R
P
E
K
D
265 265 C
O
U
O
T
L
F
)
8
8
D
V
A 260 260
(N
T
E
E
F
IN
N
IO CULVERT T 255 255
A
V
E
L
E CULVERT
CULVERT Y
C
N
250 250 E
G
H
A
T
, N
N
Y
E
T
)
M
S
N
E
N
U 245 245 G
IO
A
O
T
LEGEND N
IC
C
A
0.2% ANNUAL CHANCE FLOOD ID
H
M
IS
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
240 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
D E F L
CROSS SECTION LOCATION IL
A
H
R
235 E
D
5200 5400 5600 5800 6000 6200 6400 6600 6800 7000 7200 7400 7600 7800 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SOUHEGAN RIVER 356P 280 280
275 275
D
A
O
R
Y
R
R
E
P 270 270 S
E
K
IL
O
F
O
R
O
B
R
R
P
E
K
D
265 265 C
O
U
O
T
L
F
)
8
8 CULVERT
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
H
A
T
, N
N
Y
E
H T
)
M
S
N
E
N
U 245 245 G
IO
A
O
T
LEGEND N
IC
C
A
0.2% ANNUAL CHANCE FLOOD ID
H
M
IS
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
240 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
G L
CROSS SECTION LOCATION IL
A
H
R
235 E
D
7800 8000 8200 8400 8600 8800 9000 9200 9400 9600 9800 10000 10200 10400 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SOUHEGAN RIVER 357P 295 295
Y
1
D
0
U
T 290 1 290
E
S
D
T
D
A
U
E
O
O
IL
R
R
A
L
E
T
E
T
E
V
A
A
D
T
R
F
G
S
O
S
T 285 W 285
I
E
E
K
N
IM
IL
O
L
F
O
R
O
B
R
R
P
E
K
D
280 280 C
O
U
O
T
L
F
)
8
8
D
V
A 275 275
(N
T
E
E
F
IN
N
IO
T 270 270
A
V
E
L
E
Y
C
CULVERT N
265 265 E
G
H
A
T
, N
N
Y
E
T
)
M
S
N
E
N
U 260 260 G
IO
A
O
T
LEGEND N
IC
C
A
0.2% ANNUAL CHANCE FLOOD ID
H
M
IS
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
255 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
I J K L
CROSS SECTION LOCATION IL
A
H
R
250 E
D
10400 10600 10800 11000 11200 11400 11600 11800 12000 12200 12400 12600 12800 13000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH SOUHEGAN RIVER 358P 210 210 1% ANNUAL CHANCE BACKWATER FROM PENNICHUCK BROOK
D
A
K
O
H 205 O 205
R
O
IT
K
R
C
W
A
B
E
K
C
IM
C
N
R
U
E
R
H
U
E
L
IC
F
M
N
N
H
N S
O
T 200 E 200
C
E
K
P
U
O
O
IL
S
O
F
R
O
B
R
S
E
P
H
D 195 195 C
O
IT
O
W
L
F
)
8
8
D
V
A 190 190
(N
T
E
E
F
IN
N
IO
T 185 185
A
V
E
L
E
Y
C
N
180 180 E
G
H
A
T
, N
N
Y
E
B T
)
M
S
N
E
N
U 175 175 G
IO
A
O
T
LEGEND N
IC
C
A
0.2% ANNUAL CHANCE FLOOD ID
H
M
IS
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
170 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
A L
CROSS SECTION LOCATION IL
A
H
R
165 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 PENNICHUCK BROOK 359P 198 198
196 196
194 194 S
E
K
O
IL
O
F
R
O
B
R
S
E
P
H
D
192 192 C
O
IT
O
W
L
F
)
8
8
D
V
A 190 190
(N
T
E
E
F
IN
N
IO
T 188 188
A
V
E
L
E
Y
C
N
186 186 E
G
H
A
T
, N
N
Y
E
T
)
M
S
N
E
N
U 184 184 G
IO
A
O
T
LEGEND N
IC
C
A
0.2% ANNUAL CHANCE FLOOD ID
H
M
IS
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
182 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
C L
CROSS SECTION LOCATION IL
A
H
R
180 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 PENNICHUCK BROOK 360P 206 206
204 204
S
H
202 K 202
E
K
IT
O
O
O
W
IL
R
O
E
F
C
B
R
O
N
K
E
C
B
R
U
O
S
L
C
E
F
P
A
N
H
E
O
D
P
C
200 C 200
O
IT
O
W
L
F
)
8
8
D
V
A 198 198
(N
T
E
E
F
IN
N
IO
T 196 196
A
V
E
L
E
Y
C
N
194 194 E
G
H
A
T
, N
N
Y
E
T
)
M
S
N
E
N
U 192 192 G
IO
A
O
T
LEGEND N
IC
C
A
0.2% ANNUAL CHANCE FLOOD ID
H
M
IS
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
190 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
D E F L
CROSS SECTION LOCATION IL
A
H
R
188 E
D
13000 13500 14000 14500 15000 15500 16000 16500 17000 17500 18000 18500 19000 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH PENNICHUCK BROOK 361P 216 216 TOP OF BRIDGE = 218.9 BOTTOM OF BRIDGE = 217.3
Y
D
U
214 T 214
S
D
D
A
E
O
IL
A
R
T
S
E
E
D
M
F
A
O
S
212 IT 212
E
K
O
IM
IL
L
O
F
R
O
B
R
S
E
P
H
D 210 210 C
O
IT
O
W
L
F
)
8
8
D
V
A 208 208
(N
T
E
E
F
IN
N
IO
2 T 206 206
2
A
V
1
E
E
L
T
E
U
O
R
E
Y
T
C
A
N
T
S 204 204 E
G
H
A
T
, N
N
Y
E
T
)
M
S
N
E
N
U 202 202 G
IO
A
O
T
LEGEND N
IC
C
A
0.2% ANNUAL CHANCE FLOOD ID
H
M
IS
G
Y
1% ANNUAL CHANCE FLOOD R
C
U
U
N
O 2% ANNUAL CHANCE FLOOD J
E
L
200 R
L
G
A
O
R
10% ANNUAL CHANCE FLOOD (
E
B
STREAM BED M
S
L
E
G H L
CROSS SECTION LOCATION IL
A
H
R
198 E
D
19000 19500 20000 20500 21000 21500 E
F STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH PENNICHUCK BROOK 362P