South San Francisco Bay Shoreline Project Water 101 Academy, Session - - PowerPoint PPT Presentation

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South San Francisco Bay Shoreline Project Water 101 Academy, Session - - PowerPoint PPT Presentation

Jan 17, 2023 322 likes •503 views

South San Francisco Bay Shoreline Project Water 101 Academy, Session 3 April 1, 2020 Presented by: Sunshine V. Julian, Capital Engineering Manager 2 Agenda Shoreline Phase I Authorized Project B v a l l e y w a t e r. o r g

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South San Francisco Bay Shoreline Project

Water 101 Academy, Session 3 – April 1, 2020 Presented by: Sunshine V. Julian, Capital Engineering Manager

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v a l l e y w a t e r. o r g

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Agenda

  • Shoreline Phase I
  • Authorized Project
  • Project Need
  • Schedule
  • Shoreline Phase II
  • Feasibility Study

B

Alviso Post Office, 1983

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v a l l e y w a t e r. o r g

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v a l l e y w a t e r. o r g

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AL VISO WAST E WAT E R F ACIL IT Y

L E VE E

E c otone (tr ansitional habitat) T idal Habitat Re stor ation Union Pac ific Railr

  • ad Cr
  • ssing

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Ar te sian Slough Cr

  • ssing

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T IE S INT O ACCRE DIT E D L E VE E T IE S INT O ACCRE DIT E D L E VE E ADVANCE D WAT E R PURIF ICAT ION CE NT E R A18 A12 A13 A15 A14 A11 A9 A10

ML L W MT L MHW MHHW

NOT T O SCAL E

L e ve e

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E c otone

Authorized Project – Phase 1 (EIA 11)

1 2

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Authorized Project – Phase 1 (EIA 11)

Project Components Flood Risk Management

  • 4-miles of levee to protect from coastal flooding and rising seas
  • Manages flood risk for population of ~5,500, ~1,100 structures,

& regional wastewater facility Ecosystem Restoration

  • 2,900 acres of tidal wetlands including ecotone (transitional habitat)

Recreation

  • Provides key connections to San Francisco Bay Trail & viewpoints
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COMME RCIAL / INDUST RIAL MANUF ACT URING MOBIL E HOMEPARK HIGH T E CH/ R&D BUIL DINGS MOBIL E HOMEPARK SINGL E F AMIL Y/ MUL T I- F AMIL Y R E SIDE NT IAL SINGL E

  • F

AMIL Y RE SIDE NT IAL COMME RCIAL / INDUST RIAL L IBRARY Inte r me diate SL C Sc e nar io Inundation Map (YR50- 11.6ft NAVD88)

A18 A12

SR237

A16

ADVANCE D WAT E R PURIF ICAT ION CE NT E R WAST E WAT E R F ACIL IT Y F IREDE PART ME NT CHUR CH

Project Need – Flood Risks

E L ME NT ARY SCHOOL

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Project Need – Flood Risk Management

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Project Need - Recreation

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Photo by Judy Irving, Pelican Media

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Post-Project Recreation Access

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Ecotone & Levee Cross-Section

Upland Grassland Shallow Subtidal Sea Level Rise of 2.59 feet Projection for 2067 Intertidal Mudflat Existing Berm Low Marsh Middle Marsh High Marsh Low Marsh Middle Marsh High Marsh Intertidal Mudflat

15.2 feet high

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Existing Pond Engineered Levee 16 foot top width 3:1 Side Slope

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A12 A18 A9 A10 A11 A14 A15 A13 Reach 1 Reaches 2 & 3

First Phase Second Phase Third Phase

Alviso Wastewater Facility Reach 4 Reach 5

First Phase (2019-2023) Second Phase (2027) Third Phase (2032)

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Shoreline Phase I Schedule

  • July-November 2019:

Delivered fill for Reaches 1-3

  • December 2019:

Advertised Reaches 1-3 for Construction

  • April 2020:

30% design to be completed for Reaches 4-5

  • May 2021:

Complete design for Reaches 4-5

  • December 2021:

Advertise construction of Reaches 4-5

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Shoreline Phase II

Flood Risk Management Ecosystem Restoration Recreation

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Shoreline Phase II

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New Chicago Marsh, Alviso. Photo credit: Cris Benton

Questions

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