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How to Survive the Weather of the Future?. Sonal Sanghavi, P.E. Director Office of Environmental Design MDOT – State Highway Administration. NASTO Conference 06.12.12. PRESENTATION OBJECTIVES. Our 2011 Severe Storms Experience What did we Learn? Where do we need to Go?

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How to survive the weather of the future
How to Survive the Weather of the Future?

Sonal Sanghavi, P.E. Director

Office of Environmental Design

MDOT – State Highway Administration

NASTO Conference 06.12.12


Presentation objectives
PRESENTATION OBJECTIVES

  • Our 2011 Severe Storms Experience

  • What did we Learn?

  • Where do we need to Go?

    • Near-term Perspective

    • Long-term Perspective


Severe weather changes impacts
Severe Weather Changes & Impacts

Transportation Systems & Engineering must Adapt Assets for:


2011 hurricane irene tropical storm lee
2011 Hurricane Irene & Tropical Storm Lee

Allen’s Fresh Bridge MD 234,

Charles County Maryland


2011 hurricane irene tropical storm lee1
2011 Hurricane Irene & Tropical Storm Lee

MD 125 Baltimore County Maryland


2011 hurricane irene tropical storm lee2
2011 Hurricane Irene & Tropical Storm Lee

I 83 Near Northern Parkway,

Baltimore County Maryland


Unnamed storm in march 2011
Unnamed Storm in March 2011

US 40 over Patuxent River, Construction Project

Howard County, Maryland


How to survive the weather of the future

What Did We Find?

  • Flooding - most impact on infrastructure due to severe weather

  • All areas in Maryland face flood risks:

  • Flash floods in the stream valleys of Western Maryland

  • Urban and flash flooding in Central Maryland

  • Tidal flooding along the Chesapeake Bay, Maryland’s Coastal Bay and Atlantic coast, large river basin flooding along the Potomac and Susquehanna rivers.

  • Strategy to managing flooding –

  • Target Drainage Assets to ensure safe conveyance of water




Drainage asset management
Drainage Asset Management

Goal: Safe conveyance of stormwater to protect transportation infrastructure, community and the environment

  • Drainage Features – pipes, culverts, ditches, inlets, outfalls

  • Asset Management –

  • Inventory Inspections

  • Drainage Investigations & Assessments

  • Drainage Structures Repairs & Remediation

  • Outfall Channel Stabilization


Roadway embankment protection
Roadway Embankment Protection

Unstable Channels

US 40 in Allegany County, Maryland


Roadway embankment protection unstable urban streams
Roadway Embankment Protection Unstable Urban Streams

MD 139 in Baltimore County, Maryland


Roadway embankment protection failed pipe and outfall
Roadway Embankment ProtectionFailed Pipe and Outfall

US 301 in Charles County, Maryland

Failed 54” Pipe and Outfall


How to survive the weather of the future

Safe Stormwater Conveyance

US 220/I-68 in Allegany County


How to survive the weather of the future

Challenge – Flooding - Culvert Replacement

DA 245 Acre


How to survive the weather of the future

Challenge – Flooding - Culvert Replacement


Challenge utilities
Challenge– Utilities

1936 to now

Gas Line

Telephone Line


How to survive the weather of the future

Challenge - Blocked and Unstable Outfalls



Us 40 in cecil county outfall locations with high conveyance ratings
US 40 in Cecil County ConveyanceOutfall Locations with High Conveyance Ratings


What did we do our approach
What did we Do? ConveyanceOur Approach

Develop Strategies and Action Plan

Focus on Climate Change and Severe Weather

Phased and Multi-pronged Plan

Risk-based Approach

Information Sharing Sessions

Message - it is a local challenge and a global challenge

Share severe weather and climate change information

Share experiences and lessons learned across all business units

Planning – Engineering - Environment – Construction - Maintenance –Operations

Action Plan

What are the most critical assets?

What are the targeted actions – near-term and long-term ?


Highway system vulnerability
Highway System Vulnerability Conveyance

Infrastructure requiring further evaluation for impacts due to SLR

  • Prioritization of assets must consider emergency evacuation planning, resiliency and system redundancy

  • FEMA 100-Year Floodplain indicates 28% of SHA Structures (bridges to culverts) need further impact evaluation

  • State Maintained Roadways -

    103 miles in 500-year floodplains I 413 miles in 100-year floodplains

    Maryland is among the states most vulnerable to climate change. The fourth longest tidal coastline (behind only Florida, California and Louisiana), Maryland is the third state most vulnerable to SLR


  • Near term actions for drainage assets
    Near-Term Actions Conveyancefor Drainage Assets

    • Expand Drainage Asset Inventory

    • Expand Inspection and Maintenance Program

    • Continue Proactive Scour Program

      • Small Structures & Bridges

      • Inspections before & after storms (flood warnings)

    • Continue Drainage Investigation Program – 100 concerns/year

    • Dedicated Drainage Funds – need contingencies

    • Available Technical Expertise - over 45 Hydraulics Engineers

    • Proactive Contracting Measures –

      • On-Call Construction Contracts for small structures

      • On-Call Construction Contracts for drainage repairs/retrofits/emergency response

    • Larger capacity of New Stormwater Management Structures (extensive efforts under Bay Restoration-TMDL Program)


    Surviving the future weather key strategies
    Surviving the Future Weather ConveyanceKey Strategies

    Draw from prior experiences - Lessons Learned

    Consider Near-term and Long-term Perspectives

    Build Capacity to deal with Changing Conditions

    Prioritize the Most Vulnerable Assets

    Apply Risk-Management Methods and Tools

    Apply Ecosystem-based Approaches

    Use Best-Available Science


    How to survive the weather of the future

    Sonal Sanghavi, PE, Director Conveyance

    Office of Environmental Design

    MDOT - Maryland State Highway Administration

    410-545-8540

    ssanghavi@sha.state.md.us