Nor orth Sh Shor ore L Levee Cities of Aberdeen and Hoquiam - - PowerPoint PPT Presentation

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Nor orth Sh Shor ore L Levee Cities of Aberdeen and Hoquiam - - PowerPoint PPT Presentation

Apr 14, 2023 429 likes •677 views

Nor orth Sh Shor ore L Levee Cities of Aberdeen and Hoquiam Funding: Chehalis River Basin Flood Authority Design Team: KPFF Consulting Engineers Watershed Science & Engineering GeoEngineers Maul, Foster, & Alongi

slide-1
SLIDE 1

Nor

  • rth Sh

Shor

  • re L

Levee

Cities of Aberdeen and Hoquiam

Funding:

  • Chehalis River Basin Flood Authority

Design Team:

  • KPFF Consulting Engineers
  • Watershed Science & Engineering
  • GeoEngineers
  • Maul, Foster, & Alongi
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SLIDE 2

Existing C Conditions s – Flood Ri Risk

(Dec ecem ember er 10, 10, 20 2015 high t tide)

F Street in Aberdeen Riverside Avenue in Hoquiam

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SLIDE 3

Existing C Conditions s – Flood Ri Risk

(Janu nuary 4 4-5, 5, 2 2015 015 rainfall e event)

Conger Street in Aberdeen Oak Street in Aberdeen

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SLIDE 4

Existing C Conditions s – FE FEMA M Mapping

(Blue = = S Speci cial F Flood

  • od Hazard Area)
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SLIDE 5

Aberdeen a and Hoquiam c m currently p pay $ $1.78 millio illion in in annual N l NFIP p premiu iums (40.4% o

  • f

premiums ms paid i in Chehalis B Basin).

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SLIDE 6

Paid id NFIP c cla laim ims in in Aberdeen en a and Hoq

  • quiam t

m tot

  • tal $6.5

millio illion sin ince 1 1978 (7% o

  • f cla

laim ims p paid id in in the C Chehalis B Basin since 197 1978).

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SLIDE 7

Not

  • te: Trend s

shows on

  • ngoing l

los

  • ss
  • f NFIP c

coverage a e and t therefore le less p public licly ly a availa ilable le d data. Pos

  • ssible e

explanation

  • ns f

for

  • r trend:
  • Switch t

h to pr private e po policies es t that a t are e no not ba backed ed b by NFIP

  • Low pr

prices es a are enab e enabling cash sh tran ansa sactions w s witho hout need f t need for mortga gage

  • Sel

Seller ers are e act cting a as pr private l e lender enders

  • Low rea

eal es estate a e activi vity ( (ho homes a es are e pa paid off a and few ne new m mortgages) es)

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SLIDE 8

Living i in a Spec ecial Flood H Hazard Area ea

  • Properties are at risk for flooding. ($$$)
  • NFIP regulations add cost and complexity to development and

redevelopment.

  • Redevelopment: If cumulative value of improvements made to a structure over past

five years exceeds 50% of market value, structure must be brought into compliance with flood code. ($$$)

  • Flood insurance is mandatory with mortgages.
  • Rates are high and are increasing annually. ($$$)
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SLIDE 9

Living i in a Spec ecial Flood H Hazard Area ea

  • Properties are at risk for flooding. ($$$)
  • NFIP regulations add cost and complexity to development and

redevelopment.

  • Redevelopment: If cumulative value of improvements made to a structure over past

five years exceeds 50% of market value, structure must be brought into compliance with flood code. ($$$)

  • Flood insurance is mandatory with mortgages.
  • Rates are high and are increasing annually. ($$$)

ECONOMIC LOSS, STIFLED INVESTMENT, AND LOW PROPERTY VALUES

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SLIDE 10

Living i in a Spec ecial Flood H Hazard Area ea

  • Properties are at risk for flooding. ($$$)
  • NFIP regulations add cost and complexity to development and

redevelopment.

  • Redevelopment: If cumulative value of improvements made to a structure over past

five years exceeds 50% of market value, structure must be brought into compliance with flood code. ($$$)

  • Flood insurance is mandatory with mortgages.
  • Rates are high and are increasing annually. ($$$)

ECONOMIC LOSS, STIFLED INVESTMENT, AND LOW PROPERTY VALUES BUILD LEVEE AND DRAINAGE IMPROVEMENTS, GET OUT OF SFHA

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SLIDE 11

No North S Shore L Levee  Remove 3 3,100 p 100 properties s from SFHA.

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SLIDE 12

Des esign & gn & Con

  • nstruct

ction P Proces ess

1. Surveying, Modeling, & Analysis

  • Aerial photography and photogrammetry
  • On-ground topographic surveying
  • Bathymetric surveying
  • Hydrologic and hydraulic modeling
  • Geotechnical investigation

2. First Phase of Public Outreach, Government & Agency Coordination 3. Develop Preliminary Design & Science Package, Submit to FEMA 4. Receive Conditional Letter of Map Revision (CLOMR) – Important! 5. Second Phase of Public Outreach, Government & Agency Coordination 6. Final Design, Permitting, & ROW Acquisition 7. Construction 8. Levee Certification & Letter of Map Revision (LOMR)  Protected Areas Change from SFHA to Zone X

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SLIDE 13

Des esign & gn & Con

  • nstruct

ction P Proces ess

1. Surveying, Modeling, & Analysis

  • Aerial photography and photogrammetry
  • On-ground topographic surveying
  • Bathymetric surveying
  • Hydrologic and hydraulic modeling
  • Geotechnical investigation

2. First Phase of Public Outreach, Government & Agency Coordination 3. Develop Preliminary Design & Science Package, Submit to FEMA 4. Receive Conditional Letter of Map Revision (CLOMR) – Important! 5. Second Phase of Public Outreach, Government & Agency Coordination 6. Final Design, Permitting, & ROW Acquisition 7. Construction 8. Levee Certification & Letter of Map Revision (LOMR)  Protected Areas Change from SFHA to Zone X We are here.

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SLIDE 14

Wor

  • rk Com

Completed ed

  • 1. Surveying, Modeling, & Analyses
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SLIDE 15

Wor

  • rk Com

Completed ed

  • 2. First Phase of Public Outreach, Government & Agency Coordination
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SLIDE 16

Wor

  • rk Com

Completed ed

  • 3. Develop Preliminary Design & Science Package, Submit to FEMA
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SLIDE 17

Wor

  • rk Com

Completed ed

  • 4. Receive Conditional Letter of Map Revision (CLOMR)
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SLIDE 18

Upc pcoming T g Tasks

  • 5. Second Phase of Public Outreach, Government & Agency Coordination
  • 6. Final Design, Permitting, & ROW Acquisition
  • 7. Construction
  • 8. Levee Certification & Letter of Map Revision (LOMR)  Protected Areas

Change from SFHA to Zone X

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SLIDE 19

In progress, funded through Chehalis River Basin Flood Authority and State Supplemental Capital Budget ($4.6 million).

Upc pcoming T g Tasks

*

  • 5. Second Phase of Public Outreach, Government & Agency Coordination
  • 6. Final Design, Permitting, & ROW Acquisition
  • 7. Construction
  • 8. Levee Certification & Letter of Map Revision (LOMR)  Protected Areas

Change from SFHA to Zone X *

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SLIDE 20

In progress, funded through Chehalis River Basin Flood Authority and 2018 State Supplemental Capital Budget ($4.6 million) $75 million needed -- 2019-2021 Biennium State Capital Budget request

Upc pcoming T g Tasks

*

  • 5. Second Phase of Public Outreach, Government & Agency Coordination
  • 6. Final Design, Permitting, & ROW Acquisition
  • 7. Construction
  • 8. Levee Certification & Letter of Map Revision (LOMR)  Protected Areas

Change from SFHA to Zone X ** * **

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SLIDE 21

Part of

  • f t

the TimberWorks s Master er P Plan

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SLIDE 22

Fry Cr Creek eek Pro roject Coordina nation: n: Future P Pump St Station

  • n
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SLIDE 23

Tha hank Y You

  • u

Kris Koski, PE City Engineer City of Aberdeen (360) 537-3218 kkoski@aberdeenwa.gov www.ezview.wa.gov/aberdeenfloodrelief