broad channel street raising phase 2

23 MARCH 2017

Broad Channel Streets and Bulkheads Reconstruction

West 14th Road – West 19th Road1|

ENGINEERING, DESIGN AND RELATED CONSULTANT SERVICES FOR

RECONSTRUCTION OF WEST 14th – 19th

BOROUGH OF QUEENS

NYCDDC PROJECT ID. HWQ1182B

March 23, 2017

PRESENTATION

23 MARCH 2017



Agenda

Introduction

Understanding the Need for this Project

Concept of a Shared Street

Proposed Design

Anticipated Project Challenges

Private Property Restoration

Understanding of Critical Schedule Elements

Closing

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introduction

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Project SynopsisA keen understanding of rising sea Levels, substandard infrastructure, and the community

Low Lying Property and Streets (most built

before Legal Grade established 1945)

Substandard Storm Drainage System

Rising Sea Levels (expected to rise an

additional 4 to 24 inches for next 20 years)

Parking Constrictions

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understanding the need for the project

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Existing FloodingSea level rise of any amount is affects to the Broad Channel community

MHW + 1 MHW + 5

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Goals, Needs, WantsDeveloping the scope, and prioritizing the elements of this reconstruction project

Goals

Needs

Wants

Reduce frequency and severity of flooding within the public space Preserve the family-oriented residential feel of the community Restore the ecology along the coastline

Raise elevation of public space (streets) Install new public infrastructure (water, sewer, storm, sanitary) Harden coastal line Mitigate impact to private homes and property Install water, storm, and sanitary sewers

Consider aesthetics, ensure the project materials are consistent with community

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concept of a shared street

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Innovative way to approach street raising

• Raise the entire public space to an elevation that takes into account historical flooding elevations and future climate change projections

• Create a single surface where pedestrians, bicycles, and automobiles share the space and interact

• R.O.W. is ADA compliant

• Special zone for visually impaired

• Single bi-directional moving lane with pullover zones to allow vehicle passing

Re-thinking street design and flood mitigation on narrow residential streets

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Innovative way to approach street raising

RBA Technical Memo


NYC Climate Change Report

Other Publications

• Living Streets

• ACOE Coastal Risk Reduction

• NYS GOSR NYRCR Plan

• NYC Special Initiative for Rebuilding and Resiliency (SIRR)

• NACTO Urban Street Design

• FHWA, Shared Streets

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Innovative way to approach street raisingRe-thinking street design and flood mitigation on narrow residential streets

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23 MARCH 2017



Innovative way to approach Street raisingRe-thinking street design and flood mitigation on narrow residential streets

23 MARCH 2017




23 MARCH 2017



Innovative way to approach Street raising

FHWA Guidance


No ramps, slopes, or ADA impediments

West 14th Street

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proposed design

23 MARCH 2017



Basic Street Elements

Pull Over Zones at Fire Hydrants

Bulkhead at End of Roadway Distinctive Raised

Entrance and Signage

Shared Cross Section at a single elevation with variations in pavement materials and patterns to highlight dominant uses

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Basic Cross SectionTypical cross section of proposed elements

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Utility Infrastructure

• Water

• Storm sewer

• Sanitary Sewer

• Outfall to Jamaica Bay

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Bulkhead / WaterfrontHardened waterfront protection

• Similar in nature to the shorelines proposed under Phase 1

• Bulkhead built to the 100-year FEMA floodplain elevation

• Provides protection against coastal flooding and storm surge

• Prevents natural marsh migration and may create seaward erosion

Bulkhead / WaterfrontHardened waterfront protection

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Alternative Bulkhead / Living ShorelineCombination of hardened shoreline and Living Shoreline

• Resilient against storm surge

• Natural wave attenuation, decreasing effect of storm surge

• Improves water quality

• Marshes trap sediment from tidal waters allowing them to grow as sea level rises

• Consistent with existing ecology of Jamaica Bay

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private property restoration

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Private Property RestorationWood Stairs (23 West 14th Street)

• Decks Preserved

• Stairs Modified

• Restore similar surface in front of home

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Private Property RestorationWood Stairs (23 West 14th Street)

• Ornaments / Special features will have to be removed prior to private property construction

• Standard material will be rebuilt (such as chain link fence)

• Stairs Modified

• Provide options for surface restoration in front of homes

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Private Property MitigationWood Stairs (23 West 14th Street)

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anticipated project challenges

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Construction Means and MethodsRe-thinking waterfront construction options/techniques

Phase 1 Cofferdam Smaller Cofferdam for Site Specific Work

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PermittingUnderstanding agency requirements specifically DOT, DEP, DEC, and ACOE

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understanding of critical schedule

elements

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Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun

Schedule

NTP

Mass Mailing 2 (80%)

CB One-On-One

CB Meeting

Draft Consent Letter

Bid Documents

Advertise for Bid

2016 2017

23 MARCH 2017



questions

broad channel street raising phase 2

Engineering