Julie Eaton, PE Frank Ricciardi boston.gov/departments/public-works/climate-resilient-design-standards-and-guidelines Katie Choe, CCM Chief Engineer/Director of Construction Management City of Boston- Public Works Department Julie Eaton, PE Frank Ricciardi Lead Resiliency Engineer Vice President & Discipline Leader Weston & Sampson Weston & Sampson

PUBLIC REALM, PRIVATE DEVELOPMENT Why design standards focus so much on what will be private projects What developers are already doing (raising everything up, self protection) Constrained rights-of-way – issue with ownership – how do we leverage, protect behind coastal properties Guidance on what the City wants to see to accept designs – co-benefits and public assets

Take advantage of the investments and opportunities happening today to get the best outcome for tomorrow Protection for the ROW (because sponsored by PWD) but really for all projects happening in the flood zone Redirect investments and flood protection already in the projects due to insurance and finance requirements to serve a wider public benefit while meeting or exceeding property protection and enhancing overall project

(A COMPLEMENTARY APPROACH) TAKING ACTION TODAY (A COMPLEMENTARY APPROACH) Take incremental action while planning long-term solutions Manage projects with multiple jurisdictions and private owners Maintain mobility and access, protect critical transportation

FOUR SAMPLE FLOOD BARRIER TYPES FLOOD BARRIER DESIGN CONSIDERATIONS CLIMATE DESIGN ADJUSTMENTS Clearly stating what you are designing for – 2070 levels (about 4 feet – 3 + 1 ft freeboard) with adaptation for another 2 feet Helping you select what barrier or treatment is most appropriate Included samples of what we are seeing most often Not proscriptive, but shows what will make things smoother going through City approval process Forefront O&M requirements

SAMPLE FLOOD BARRIERS VEGETATED BERMS HARBORWALK FLOOD BARRIER RAISED ROADWAYS TEMPORARY FLOOD BARRIERS Note: All samples assumed a barrier height of 4 ft. for 2070 flood protection

CLIMATE DESIGN GUIDELINE COMPONENTS CLIMATE DESIGN LOAD ADJUSTMENTS CONCEPT FOR FLOOD BARRIER DESIGN Design ► permitting strategy ► additional feasibility studies ► increase reliability ► incremental adaptation and timeline ► value creation, social impact, equity, & co-benefits O&M Barrier Selection Clearly stating what you are designing for – 2070 levels (about 4 feet – 3 + 1 ft freeboard) with adaptation for another 2 feet Helping you select what barrier or treatment is most appropriate Included samples of what we are seeing most often Not proscriptive, but shows what will make things smoother going through City approval process Forefront O&M requirements Cost

CLIMATE DESIGN ADJUSTMENTS FOCUS ON USEFUL LIFE OF INFRASTRUCTURE GOAL: DESIGN FOR MIN. 2070 CONDITIONS WITH ABILITY TO GET 2+ MORE FT. FLOOD PROTECTION IN FUTURE 2030 2035 2050 2060 2070 2100 BASELINE FOCUS ON USEFUL LIFE OF INFRASTRUCTURE CLIMATE PROJECTIONS TAKEN FROM PREVIOUS STUDIES

CLIMATE DESIGN ADJUSTMENTS PROBABILITY OF FLOODING DEPTH OF FLOODING FLOOD DURATION WAVE LOADING CURRENT VELOCITIES Flooding during the March 2, 2018 Nor’easter at Langone Park & Puopolo Playground

DESIGN CONSIDERATIONS

SAMPLE VEGETATED BERM BARRIER

SAMPLE VEGETATED BERM BARRIER

SAMPLE HARBORWALK (SEAWALL) BARRIER

SAMPLE HARBORWALK (SEAWALL) BARRIER

IN-PROGRESS HARBORWALK (SEAWALL) BARRIER Flood protection cross-section – elevated boardwalk REAL WORLD APPLICATION: LANGONE & PUOPOLO

SAMPLE RAISED ROADWAY BARRIER Option 1 Consider options to reduce to one-way traffic and add bike lanes, meet Complete Streets Standards

SAMPLE RAISED ROADWAY BARRIER Option 1

SAMPLE RAISED ROADWAY BARRIER ► Sidewalk gutters (debris, stormwater runoff) ► Snow removal problems ► Poor lighting and personal safety ► Accidents more deadly ► Vehicle emission pipes at head level of pedestrians (poor air quality ) ► ADA compliance ► Emergency accessibility ► Business and community health

SAMPLE RAISED ROADWAY BARRIER Option 2 Consider options to reduce to one-way traffic and add bike lanes, meet Complete Streets Standards

SAMPLE RAISED ROADWAY BARRIER Option 2

REAL WORLD APPLICATION: MIAMI BEACH SAMPLE RAISED ROADWAY Streets flood due to regular rainfall as well as storm events Raised streets are not a coastal barrier MB plan to raise everything up—not just roadways REAL WORLD APPLICATION: MIAMI BEACH

O&M AND COST CONSIDERATIONS NOT JUST BARRIER OPERATIONS AND MAINTENANCE CONSIDERATIONS! Case Study: Stormwater management for raised roadways in Sunset Harbor, Miami Beach, FL ► energy costs for pump stations and system redundancy ► reassigned or new staff (or contractors) to maintain the new pump stations, generators, treatment systems, and utilities associated with stormwater management ► new O&M equipment needed for stormwater management ► operations management support ► staff training Elevated roads and pump station

O&M AND COST CONSIDERATIONS NOT JUST WATER! SNOW & ICE! Source: Boston_January 2015_Shutterstock_Svitlana Pimenov

DEPLOYABLE FLOOD BARRIER Design Considerations for the Site ► Barrier extent/connection to site ► Available open space (deployment or storage) ► Accessibility ► Terrain conditions ► Offsite impacts Design Considerations for the Product ► Physical Characteristics ► Structural Properties ► Operational Requirements ► Industry Warranty, Certification, Testing Not intended for long-term use Manpower/equipment available before/during/after storm (Competing needs and demands) Lead time False Alarm Costs Reliability and consequences of failure OPERATIONAL CAPACITY

DEPLOYABLE FLOOD BARRIER DEPLOYABLE FLOOD BARRIER

BUILDING A RESILIENT BOSTON PIC Currently Controls Applicability of Resilient Design Requirements for Projects PWD Working with BPDA on Incorporating Standards into Design Review Process PWD Developing City Policy to Ensure Consistent Implementation PWD Sharing Standards with Neighboring Cities https://www.boston.gov/departments/public-works/climate-resilient-design-standards-and-guidelines

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