HAWAII COUNTY, HAWAIIdlnreng.hawaii.gov › nfip › wp-content › uploads › sites › ... · hawaii county, hi * data not available confluence with ainako stream limit of study

Federal Emergency Management Agency

FLOOD INSURANCE STUDY

NUMBER 155166V009B

VOLUME 9 OF 11

HAWAII COUNTY,

HAWAII

REVISED: September 29, 2017

Hawaii County

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.

May 3, 1982Initial FIS Effective Date:

September 16, 1988 (FIRM panels only)First Revised FIS Date:

July 16, 1990Second Revised FIS Date:

May 16, 1994Third Revised FIS Date:

June 2, 1995Fourth Revised FIS Date:

April 2, 2004Fifth Revised FIS Date:

September 29, 2017Sixth Revised FIS Date:

i

TABLE OF CONTENTS

VOLUME 1 – September 29, 2017

Page

1.0 INTRODUCTION.......................................................................................................................... 1

1.1 Purpose of Study ................................................................................................................. 1 1.2 Authority and Acknowledgments ....................................................................................... 1 1.3 Coordination ....................................................................................................................... 3

2.0 AREA STUDIED ........................................................................................................................... 4

2.1 Scope of Study .................................................................................................................... 4 2.2 Community Description ...................................................................................................... 9 2.3 Principal Flood Problems .................................................................................................. 13 2.4 Flood Protection Measures ............................................................................................... 18 2.5 Levees ............................................................................................................................... 21

3.0 ENGINEERING METHODS ..................................................................................................... 23

3.1 Hydrologic Analyses ......................................................................................................... 23 3.2 Hydraulic Analyses ........................................................................................................... 55 3.3 Vertical Datum .................................................................................................................. 89

FIGURES

14

25

47

63

Figure 1: Hurricane tracklines within a 200 nautical mile radius of the Hawaiian IslandsFigure 2: Division of Stations, Windward and Leeward Groups

Figure 3: Stillwater Station Location Map

Figure 4: Transect Schematic

Figure 5: Transect Location Maps 65

TABLES Table 1: Letters of Map Change .................................................................................................................. 8

Table 2: Levees .......................................................................................................................................... 22

Table 3: Summary of Discharges ............................................................................................................... 27

Table 4: Summary of Historical Storm Events Selected for Development of Hurricane Storm Surge

Elevations ..................................................................................................................................... 41

Table 5: Summary of Coastal Hurricane Stillwater Elevations ................................................................. 42

Table 6: Transect Descriptions ................................................................................................................... 73

Table 7: Transect Data................................................................................................................................ 82


FIGURES (Continued)

Figure 6: Floodway Schematic 151

ii

TABLE OF CONTENTS (continued)


TABLES (Continued)

Table 8: Floodway Data Tables ................................................................................................................. 93

Table 9: Additional Information .............................................................................................................. 155

4.0 FLOODPLAIN MANAGEMENT APPLICATIONS ............................................................... 90

4.1 Floodplain Boundaries ...................................................................................................... 90

4.2 Floodways ......................................................................................................................... 91

4.3 Tsunami Inundation Boundaries ..................................................................................... 152

5.0 INSURANCE APPLICATIONS ............................................................................................... 153

6.0 FLOOD INSURANCE RATE MAP ........................................................................................ 154

7.0 OTHER STUDIES ..................................................................................................................... 154

8.0 LOCATION OF DATA ............................................................................................................. 155

9.0 BIBLIOGRAPHY AND REFERENCES................................................................................. 156


EXHIBITS

Exhibit 1 – Flood Profiles Ainako Stream Panels 01P-04P Alenaio Stream Panels 05P-21P Auwaiakeakua Gulch Panel 22P Captain Cook Watercourse No. 1 Panels 23P-27P Captain Cook Watercourse No. 1 Overflow Panels 28P-30P Four Mile Creek Panels 31P-33P Four Mile Creek (Shallow Flooding) Panels 34P-40P Four Mile Creek Tributary No. 1 Panels 41P-45P Four Mile Creek Tributary No. 3 Panel 46P Gulch 2 - Hapuna Panels 47P-48P Gulch 3 - Hapuna Panel 49P Gulch 4 - Puako Panels 50P-51P Hienaloli Drainageway Panels 52P-67P Hienaloli Draingeway Splitflow Panel 68P Holualoa Drainageway Panels 69P-94P


Exhibit 1 – Flood Profiles (continued)

Holualoa Drainageway Splitflow Panel 95P

iii

*Profiles for Palai Stream 188P(a) and Palai Stream A 193P not printed


VOLUME 4 – September 29, 2017 (Continued)


Holualoa Drainageway Tributary Panels 96P-99P Holualoa Drainageway Tributary Splitflow Panels 100P Honokaa Drainage A Panels 101P-103P Honokaa Drainage B Panel 104P Honokaa Drainage C Panel 105P Honokaa Drainage D Panel 106P Honokaa Drainage No. 1 Panels 107P-111P Honokaa Drainage No. 2 Panels 112P-116P Honokaa Drainage No. 3 Panels 117P-122P Horseshoe Bend Drainageway Panels 123P-134P Kaluiiki Branch Panels 135P-140P Kamakoa Gulch Panels 141P-143P Kamuela Stream Panel 144P Kaumalumalu Drainageway Panels 145P-157P Keopu Drainageway Panels 158P-168P Keopu Drainageway Overflow Panels 169P-170P Keopu Drainageway Overflow Tributary Panel 171P Kupulau Flood Ditch Panel 172P Lower Lanimaumau Stream Panels 173P-176P Mohouli Street Drainage Panels 177P-178P Ninole Gulch Panels 179P-180P



Palai Stream* Panels 181P-192P Palai Stream A* Panels 193P-194P Palai Stream A Splitflow No. 3 Panel 195P Palai Stream C (Downstream of Kupalau Flood Ditch) Panels 196P-197P Palai Stream C (Upstream of Kupulau Flood Ditch) Panel 198P Palai Stream D Panels 199P-200P Palai Stream E Panel 201P Palai Stream F Panel 202P Queen Kaahumanu Highway Split Flow Panel 203P-207P Queen Kaahumanu Highway Tributary Panel 208P-209P South Kona Watercourse No. 1 Panels 210P-241P South Kona Watercourse No. 2 Panels 242P-257P



South Kona Watercourse No. 3 Panels 258P-273P South Kona Watercourse No. 4 Panels 274P-284P South Kona Watercourse No. 5 Panels 285P-303P South Kona Watercourse No. 5A Panels 304P-305P South Kona Watercourse No. 6 Panels 306P-325P South Kona Watercourse No. 7 Panels 326P-342P

iv




South Kona Watercourse No. 8 Panels 343P-363P

South Kona Watercourse No. 8A Panel 364P

South Kona Watercourse No.9 Panels 365P-374P





















Tributary 1 to Ainako Stream Panels 537P-538P



Tributary 4 to Ainako Stream Panel 544P

Tributary 1 to Waiakea Tributary No. 3A Panel 545P

Tributary 2 to Waiakea Tributary No. 3A Panel 546P

Tributary 3 to Waiakea Tributary No. 3A Panels 547P-548P

Tributary 4 to Waiakea Tributary No. 3A Panels 549P-550P

Tributary 1 to Waiakea Tributary No. 3B Panel 551P

Tributary 2 to Waiakea Tributary No. 3B Panel 552P

Tributary 1 to Waipahoehoe Stream Panels 553P-555P

Tributary to Mohouli Street Drainage Panel 556P

Unnamed Stream No. 1 Panels 557P-561P

Unnamed Stream No. 3 Panels 562P-565P

Unnamed Tributary to Alenaio Stream Panels 566P-571P

Upper Lanimaumau Stream Panels 572P-579P

v




Waiaha Drainageway Panels 580P-612P

Waiaha Drainageway Splitflow No. 1 Panels 613P-614P


Waiaha Drainageway Splitflow No.2 Loop One Panel 623P

Waiaha Drainageway Splitflow No. 2 Loop Two Panel 624P

Waiaha Drainageway Splitflow No. 3 Panel 625P


Waiaha Drainageway Tributary Panels 628P-633P

Waiakea Stream Panels 634P-650P

Waiakea Tributary No. 1 Panels 651P-652P



Waiakea Tributary No. 3A Panels 658P-663P

Waiakea Tributary No. 3B Panels 664P-668P


Waikoloa Stream Panels 669P-674P

Waikoloa Stream Split Flow Panel 675P

Waikoloa Stream Tributary Panels 676P-678P

Waipahoehoe Stream Panels 679P-680P

Exhibit 2 – Tsunami Coastline Profile Panels 01T-13T

Exhibit 3 – Flood Insurance Rate Map Index (Published Separately)

Flood Insurance Rate Map (Published Separately)

(LO

CAL

MEA

N S

EA L

EVEL

)

507P510P

(LO

CAL

MEA

N S

EA L

EVEL

)

508P511P

(LO

CAL

MEA

N S

EA L

EVEL

)

509P512P

(LO

CAL

MEA

N S

EA L

EVEL

)

510P513P

(LO

CAL

MEA

N S

EA L

EVEL

)

511P514P

(LO

CAL

MEA

N S

EA L

EVEL

)

512P515P

516P

517P

(LO

CAL

MEA

N S

EA L

EVEL

)

515P518P

(LO

CAL

MEA

N S

EA L

EVEL

)

519P

(LO

CAL

MEA

N S

EA L

EVEL

)

517P520P

(LO

CAL

MEA

N S

EA L

EVEL

)

521P

(LO

CAL

MEA

N S

EA L

EVEL

)

522P

(LO

CAL

MEA

N S

EA L

EVEL

)

523P

(LO

CAL

MEA

N S

EA L

EVEL

)

524P

(LO

CAL

MEA

N S

EA L

EVEL

)

525P

(LO

CAL

MEA

N S

EA L

EVEL

)

526P

527P

(LO

CAL

MEA

N S

EA L

EVEL

)

528P

(LO

CAL

MEA

N S

EA L

EVEL

)

(LO

CAL

MEA

N S

EA L

EVEL

)

529P

530P

(LO

CAL

MEA

N S

EA L

EVEL

)

531P

(LO

CAL

MEA

N S

EA L

EVEL

)

532P

THE 4%, 2%, AND 0.2% ANNUAL CHANCE FLOOD PROFILES ARE TOO CLOSE TO THE 1% ANNUAL CHANCE ELEVATION TO BE

SHOWN SEPARATELY

(LO

CAL

MEA

N S

EA L

EVEL

)

533P

(LO

CAL

MEA

N S

EA L

EVEL

)

534P


SHOWN SEPARATELY

(LO

CAL

MEA

N S

EA L

EVEL

)

535P


SHOWN SEPARATELY


SHOWN SEPARATELY

(LO

CAL

MEA

N S

EA L

EVEL

)

536P

534P

(LO

CAL

MEA

N S

EA L

EVEL

)

537P

FE

DE

RA

L E

ME

RG

EN

CY

M

AN

AG

EM

EN

T A

GE

NC

Y

FL

OO

D P

RO

FIL

ES

LEGEND

268P

TR

IB

UT

AR

Y 1 T

O A

IN

AK

O S

TR

EA

M

ELE

VA

TIO

N IN

F

EE

T (LO

CA

L M

EA

N S

EA

LE

VE

L)

STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH AINAKO STREAM

HA

WA

II C

OU

NT

Y, H

I

* DATA NOT AVAILABLE

LIM

IT

O

F S

TU

DY

1% ANNUAL CHANCE FLOOD

STREAM BED

CROSS SECTION LOCATION

*0.2% ANNUAL CHANCE FLOOD

*10% ANNUAL CHANCE FLOOD


535P538P

482P

(LO

CA

L M

EA

N S

EA

LE

VE

L)

536P539P

FE

DE

RA

L E

ME

RG

EN

CY

M

AN

AG

EM

EN

T A

GE

NC

Y

FL

OO

D P

RO

FIL

ES

LEGEND

270P

TR

IB

UT

AR

Y 2 T

O A

IN

AK

O S

TR

EA

M

ELE

VA

TIO

N IN

F

EE

T (LO

CA

L M

EA

N S

EA

LE

VE

L)


HA

WA

II C

OU

NT

Y, H

I


LIM

IT

O

F S

TU

DY


STREAM BED





537P540P

538P

(LO

CA

L M

EA

N S

EA

LE

VE

L)

538P541P

485P

(LO

CA

L M

EA

N S

EA

LE

VE

L)

539P542P

FE

DE

RA

L E

ME

RG

EN

CY

M

AN

AG

EM

EN

T A

GE

NC

Y

FL

OO

D P

RO

FIL

ES

LEGEND

273P

TR

IB

UT

AR

Y 3 T

O A

IN

AK

O S

TR

EA

M

ELE

VA

TIO

N IN

F

EE

T (LO

CA

L M

EA

N S

EA

LE

VE

L)

STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH ALENAIO STREAM

HA

WA

II C

OU

NT

Y, H

I


LIM

IT

O

F S

TU

DY


STREAM BED





480P540P543P

FE

DE

RA

L E

ME

RG

EN

CY

M

AN

AG

EM

EN

T A

GE

NC

Y

FL

OO

D P

RO

FIL

ES

LEGEND

274P

TIB

UT

AR

Y 4 T

O A

IN

AK

O S

TR

EA

M

ELE

VA

TIO

N IN

F

EE

T (LO

CA

L M

EA

N S

EA

LE

VE

L)


HA

WA

II C

OU

NT

Y, H

I


CO

NF

LU

EN

CE

W

IT

H

AIN

AK

O S

TR

EA

M

LIM

IT

O

F S

TU

DY


STREAM BED





1% ANNUAL CHANCE BACKWATER

EFFECTS FROM AINAKO STREAM

541P

TRIB

UTA

RY

544P

488P

(LO

CA

L M

EA

N S

EA

LE

VE

L)

542P545P

489P

(LO

CA

L M

EA

N S

EA

LE

VE

L)

543P546P

490P

(LO

CA

L M

EA

N S

EA

LE

VE

L)

544P547P

491P

(LO

CA

L M

EA

N S

EA

LE

VE

L)

545P548P

492P

(LO

CA

L M

EA

N S

EA

LE

VE

L)

546P549P

493P

(LO

CA

L M

EA

N S

EA

LE

VE

L)

547P

TRIB

UTA

RY4

TO

WAI

AKEA

TR

IBU

TAR

Y N

O. 3

A

550P

494P

(LO

CA

L M

EA

N S

EA

LE

VE

L)

548P551P

495P

(LO

CA

L M

EA

N S

EA

LE

VE

L)

549P552P

496P

(LO

CA

L M

EA

N S

EA

LE

VE

L)

550P553P

497P

(LO

CA

L M

EA

N S

EA

LE

VE

L)

551P554P

498P

(LO

CA

L M

EA

N S

EA

LE

VE

L)

552P555P

315

320

325 325

330 330

335 335

340 340

345 345

350 350

355 355

360 360

0 200 400 600 800 1000

ELEV

AT

ION

IN

FEE

T (

LOC

AL

MEA

N S

EA L

EVEL

)

STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MOHOULI STREET DRAINAGE

FED

ERA

L EM

ERG

ENC

Y M

AN

AG

EMEN

T A

GEN

CY

HA

WII C

OU

NT

Y, H

IFL

OO

D P

RO

FILE

S

TR

IBU

TA

RY

TO

MO

HO

ULI

ST

REE

T D

RA

INA

GE

286P

LIM

IT O

F S

TU

DY

LEGEND





STREAM BED


CO

NFL

UEN

CE

WIT

HM

OH

OU

LI S

TR

EET

*DATA NOT AVAILABLE

1% ANNUAL CHANCE BACKWATER EFFECTS

FROM MOHOULI STREET DRAINAGE

DR

AIN

AG

E

556P

2790

2795

2800 2800

2805 2805

2810 2810

2815 2815

2820 2820

2825 2825

2830 2830

2835 2835

0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600

ELEV

AT

ION

IN

FEE

T (

LOC

AL

MEA

N S

EA L

EVEL

)

STREAM DISTANCE IN FEET ABOVE LIMIT OF STUDY*

FED

ERA

L EM

ERG

ENC

Y M

AN

AG

EMEN

T A

GEN

CY

HA

WA

II C

OU

NT

Y,

HI

FLO

OD

PR

OFI

LES

UN

NA

MED

ST

REA

M N

O. 1

287P

A B C

LEGEND

0.2% ANNUAL CHANCE FLOOD




STREAM BED


*LIMIT OF STUDY APPROXIMATELY 500 FEETUPSTREAM OF 'AINAHUA ALANUI ROAD

THE 0.2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY

LIM

IT O

FS

TU

DY

557P

2805

2810

2815 2815

2820 2820

2825 2825

2830 2830

2835 2835

2840 2840

2845 2845

2850 2850

2600 2800 3000 3200 3400 3600 3800 4000 4200 4400 4600 4800 5000 5200

ELEV

AT

ION

IN

FEE

T (

LOC

AL

MEA

N S

EA L

EVEL

)


FED

ERA

L EM

ERG

ENC

Y M

AN

AG

EMEN

T A

GEN

CY

HA

WA

II C

OU

NT

Y,

HI

FLO

OD

PR

OFI

LES

UN

NA

MED

ST

REA

M N

O. 1

288P

D

LEGEND





STREAM BED



THE 0.2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY

0.2%, 1%, 2%, AND 10% ANNUAL CHANCE FLOOD PROFILES CONTAINED IN CHANNEL

558P

2815

2820

2825 2825

2830 2830

2835 2835

2840 2840

2845 2845

2850 2850

2855 2855

2860 2860

5200 5400 5600 5800 6000 6200 6400 6600 6800 7000 7200 7400 7600 7800

ELEV

AT

ION

IN

FEE

T (

LOC

AL

MEA

N S

EA L

EVEL

)


FED

ERA

L EM

ERG

ENC

Y M

AN

AG

EMEN

T A

GEN

CY

HA

WA

II C

OU

NT

Y,

HI

FLO

OD

PR

OFI

LES

UN

NA

MED

ST

REA

M N

O. 1

289P

E

F

LEGEND





STREAM BED


UPSTREAM OF 'AINAHUA ALANUI ROAD*LIMIT OF STUDY APPROXIMATELY 500 FEET

THE 0.2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TOTHE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY

THE 2% AND 0.2% ANNUAL CHANCE FLOOD PROFILES ARE TOO CLOSE TO THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY

UN

NA

MED

ST

REA

M N

O.

3C

ON

FLU

NEC

E O

F

LAN

IMA

UM

AU

ST

REA

MC

ON

FLU

NEC

E O

F U

PP

ER

559P

2840

2845

2850 2850

2855 2855

2860 2860

2865 2865

2870 2870

2875 2875

2880 2880

2885 2885

7800 8000 8200 8400 8600 8800 9000 9200 9400 9600

ELEV

AT

ION

IN

FEE

T (

LOC

AL

MEA

N S

EA L

EVEL

)


FED

ERA

L EM

ERG

ENC

Y M

AN

AG

EMEN

T A

GEN

CY

HA

WA

II C

OU

NT

Y,

HI

FLO

OD

PR

OFI

LES

UN

NA

MED

ST

REA

M N

O. 1

290P

LEGEND





STREAM BED


THE 0.2% ANNUAL CHANCE FLOOD PROFILE IS

ELEVATION TO BE SHOWN SEPARATELYTOO CLOSE TO THE 1% ANNUAL CHANCE

THE 0.2% ANNUAL CHANCE FLOOD PROFILE ISTOO CLOSE TO THE 1% ANNUAL CHANCE ELEVATION

TO BE SHOWN SEPARATELY

*LIMIT OF STUDY APPROXIMATELY 500 FEETUPSTREAM OF 'AINAHUA ALANUI ROAD 560P

2870

2875

2880 2880

2885 2885

2890 2890

2895 2895

2900 2900

2905 2905

2910 2910

2915 2915

9600 9800 10000 10200 10400 10600 10800 11000

ELEV

AT

ION

IN

FEE

T (

LOC

AL

MEA

N S

EA L

EVEL

)


FED

ERA

L EM

ERG

ENC

Y M

AN

AG

EMEN

T A

GEN

CY

HA

WA

II C

OU

NT

Y,

HI

FLO

OD

PR

OFI

LES

UN

NA

MED

ST

REA

M N

O. 1

291P

G H I

MA

MA

LAH

OA

HIG

HW

AY

LEGEND





STREAM BED


1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELYTHE 0.2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE

THE 0.2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO


LIM

IT O

F S

TU

DY

THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY

561P

505P

(LOCA

L MEA

N SE

A LE

VEL)

559P562P

506P

(LOCA

L MEA

N SE

A LE

VEL)

560P563P

2885

2890

2895 2895

2900 2900

2905 2905

2910 2910

2915 2915

2920 2920

2925 2925

2930 2930

3800 4000 4200 4400 4600 4800 5000 5200 5400 5600 5800

ELEV

AT

ION

IN

FEE

T (

LOC

AL

MEA

N S

EA L

EVEL

)

STREAM DISTANCE IN FEET ABOVE THE CONFLUENCE WITH UNNAMED STREAM NO. 1

FED

ERA

L EM

ERG

ENC

Y M

AN

AG

EMEN

T A

GEN

CY

HA

WA

II C

OU

NT

Y,

HI

FLO

OD

PR

OFI

LES

UN

NA

MED

ST

REA

M N

O. 3

294P

MA

MA

LAH

OA

HIG

HW

AY

LEGEND





STREAM BED


THE 2% AND 0.2% ANNUAL CHANCE FLOOD PROFILES ARE TOO CLOSE TO THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY

LIM

IT O

F FL

OO

DIN

G

E F

564P

2915

2920

2925 2925

2930 2930

2935 2935

2940 2940

2945 2945

2950 2950

2955 2955

2960 2960

5800 6000 6200 6400 6600 6800 7000 7200 7400

ELEV

AT

ION

IN

FEE

T (

LOC

AL

MEA

N S

EA L

EVEL

)


FED

ERA

L EM

ERG

ENC

Y M

AN

AG

EMEN

T A

GEN

CY

HA

WA

II C

OU

NT

Y,

HI

FLO

OD

PR

OFI

LES

UN

NA

MED

ST

REA

M N

O. 3

295P

G H I

LIM

IT O

F S

TU

DY

OV

ERFL

OW

LEGEND





STREAM BED


THE 2% AND 0.2% ANNUAL CHANCE FLOOD PROFILES ARE TOO CLOSE TO THE

1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY

565P

EL

EV

AT

IO

N IN

F

EE

T (L

OC

AL

T

ID

AL

D

AT

UM

)

FE

DE

RA

L E

ME

RG

EN

CY

M

AN

AG

EM

EN

T A

GE

NC

Y

FLO

OD

P

RO

FILE

S

LEGEND



STREAM BED




296P


HA

WA

II C

OU

NT

Y, H

I

UN

NA

ME

D T

RIB

UT

AR

Y T

O A

LE

NA

IO

S

TR

EA

M

CO

NF

LU

EN

CE

W

IT

H


AL

EN

AIO

S

TR

EA

M

1% ANNUAL CHANCE BACKWATER

EFFECTS FROM ALENAIO STREAM

(LO

CAL

MEA

N S

EA L

EVEL

)

563P566P

ELE

VA

TIO

N IN

F

EE

T (LO

CA

L T

ID

AL D

AT

UM

)

FE

DE

RA

L E

ME

RG

EN

CY

M

AN

AG

EM

EN

T A

GE

NC

Y

FL

OO

D P

RO

FIL

ES

LEGEND

297P


HA

WA

II C

OU

NT

Y, H

I

UN

NA

ME

D T

RIB

UT

AR

Y T

O A

LE

NA

IO

S

TR

EA

M




STREAM BED




(LO

CA

L M

EA

N S

EA

LE

VE

L)

564P567P

ELE

VA

TIO

N IN

F

EE

T (LO

CA

L T

ID

AL D

AT

UM

)

FE

DE

RA

L E

ME

RG

EN

CY

M

AN

AG

EM

EN

T A

GE

NC

Y

FL

OO

D P

RO

FIL

ES

LEGEND

298P


HA

WA

II C

OU

NT

Y, H

I

UN

NA

ME

D T

RIB

UT

AR

Y T

O A

LE

NA

IO

S

TR

EA

M

AK

OLE

A R

OA

D




STREAM BED




(LO

CA

L M

EA

N S

EA

LE

VE

L)

565P568P

ELE

VA

TIO

N IN

F

EE

T (LO

CA

L T

ID

AL D

AT

UM

)

FE

DE

RA

L E

ME

RG

EN

CY

M

AN

AG

EM

EN

T A

GE

NC

Y

FL

OO

D P

RO

FIL

ES

LEGEND

299P


HA

WA

II C

OU

NT

Y, H

I

UN

NA

ME

D T

RIB

UT

AR

Y T

O A

LE

NA

IO

S

TR

EA

M

WILD

ER

R

OA

D




STREAM BED




(LO

CA

L M

EA

N S

EA

LE

VE

L)

566P569P

ELE

VA

TIO

N IN

F

EE

T (LO

CA

L T

ID

AL D

AT

UM

)

FE

DE

RA

L E

ME

RG

EN

CY

M

AN

AG

EM

EN

T A

GE

NC

Y

FL

OO

D P

RO

FIL

ES

LEGEND

300P


HA

WA

II C

OU

NT

Y, H

I

UN

NA

ME

D T

RIB

UT

AR

Y T

O A

LE

NA

IO

S

TR

EA

M




STREAM BED




(LO

CA

L M

EA

N S

EA

LE

VE

L)

567P570P

EL

EV

AT

IO

N IN

F

EE

T (L

OC

AL

T

ID

AL

D

AT

UM

)

FE

DE

RA

L E

ME

RG

EN

CY

M

AN

AG

EM

EN

T A

GE

NC

Y

FLO

OD

P

RO

FILE

S

LEGEND

301P


HA

WA

II C

OU

NT

Y, H

I

UN

NA

ME

D T

RIB

UT

AR

Y T

O A

LE

NA

IO

S

TR

EA

M




STREAM BED




LIM

IT

O

F S

TU

DY

(LO

CAL

MEA

N S

EA L

EVEL

)

568P571P

2800

2810

2820 2820

2830 2830

2840 2840

2850 2850

2860 2860

2870 2870

2880 2880

2890 2890

0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300

ELEV

AT

ION

IN

FEE

T (

LOC

AL

MEA

N S

EA L

EVEL

)


FED

ERA

L EM

ERG

ENC

Y M

AN

AG

EMEN

T A

GEN

CY

HA

WA

II C

OU

NT

Y,

HI

FLO

OD

PR

OFI

LES

UP

PER

LA

NIM

AU

MA

U S

TR

EAM

302P

LEGEND





STREAM BED


A

CO

NFL

UEN

CE

WIT

H

FLOODING CONTROLLED BY UNNAMED STREAM NO. 1

UN

NA

MED

ST

REA

M N

O.

1THE 2% AND 0.2% ANNUAL CHANCE FLOOD PROFILES ARE TOO CLOSE THE 1% ANNUAL CHANCE ELEVATION TO BE SHOWN SEPARATELY

THE 0.2% ANNUAL CHANCE FLOOD PROFILE IS TOO CLOSE TO THE


572P

516P

(LOCA

L MEA

N SE

A LE

VEL)

570P573P

517P

(LOCA

L MEA

N SE

A LE

VEL)

571P574P

518P

(LOCA

L MEA

N SE

A LE

VEL)

572P575P

519P

(LOCA

L MEA

N SE

A LE

VEL)

573P576P

224P224P520P

(LOCA

L MEA

N SE

A LE

VEL)

574P577P

224P365P521P

(LOCA

L MEA

N SE

A LE

VEL)

575P578P

3170

3180

3190 3190

3200 3200

3210 3210

3220 3220

3230 3230

3240 3240

3250 3250

3260 3260

7000 7100 7200 7300 7400 7500 7600

ELEV

AT

ION

IN

FEE

T (

LOC

AL

MEA

N S

EA L

EVEL

)


FED

ERA

L EM

ERG

ENC

Y M

AN

AG

EMEN

T A

GEN

CY

HA

WA

II C

OU

NT

Y,

HI

FLO

OD

PR

OFI

LES

UP

PER

LA

NIM

AU

MA

U S

TR

EAM

309P

M N O

LEGEND





STREAM BED


LIM

IT O

F S

TU

DY


THE 2% AND 0.2% ANNUAL CHANCE FLOOD PROFILES ARE TOO CLOSE TO THE

579P

Documents

HAWAII COUNTY, HAWAIIdlnreng.hawaii.gov › nfip › wp-content › uploads › sites › ... · hawaii county, hi * data not available confluence with ainako stream limit of study