Spreading Awareness Through HAZUS - Outreach Efforts in New London, CT

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1 Spreading Awareness Through HAZUS - Outreach Efforts in New London, CT Amol Daxikar, GISP, CFM & Erin Howell, GISP, CFM Thursday, June 13, 2013

2 Agenda Introduction Project Location Prescoping and Initial Stakeholder Meeting Basemapping and Data Preparation HAZUS Level 2 Risk Assessment and Risk Point Analysis Comparison and Reporting of Results 2

3 Introduction The main objective of the study was to determine the potential economic loss associated with coastal flooding FEMA s HAZards United States (HAZUS) tool is designed to produce loss estimates for use by federal, state, regional and local governments and private enterprises in planning for risk mitigation, emergency preparedness, response and recovery HAZUS includes capabilities to analyze earthquakes, floods and hurricane winds 3

4 Project Location City of New London Land area of 6.97 square miles 11.3 miles of shoreline Town of Groton, City of Groton, Groton Long Point Association, Noank Fire District Land area of 28.9 square miles 55 miles of shoreline 4

5 Project Location 5

6 Hurricane Irene and Sandy FEMA Statewide Financial Assistance Individual Assistance Total Individual & Households Program Total Housing Assistance Total Other Needs Assistance Public Assistance Total Public Assistance Hurricane Irene (DR-4023) $9.5M $8.8M $0.7M $44.9M Hurricane Sandy (DR-4087) $13.3M $12.3M $1.0M $4.0M Emergency Work $24.2M $3.7M Permanent Work $19.0M $0.3M 6

7 Initial Stakeholders Meeting An initial coordination meeting was held on May 6 th, 2010 at Groton Town Hall Annex in Town of Groton This meeting was attended by the representatives from FEMA, STARR, CT DEEP, Town of Groton and City of New London STARR representative provided a detailed presentation that covered the scope and objectives of the Risk Assessment project 7

8 Basemapping and Data Preparation HAZUS analysis can be performed on 3 different levels depending on the amount of input data provided by the user 8

9 Basemapping and Data Preparation HAZUS Level I uses only the default data provided with the software HAZUS Level 2 analysis can be used to determine flood hazard and measurement of exposure using a combination of default and detailed information HAZUS level 2 gives the user flexibility when deciding the types of data to be used. 9

10 Basemapping and Data Preparation The datasets used by STARR varied in some instances Flooding information generated from July 8, 2011 Effective Flood Insurance Study August 5, 2013 Revised Flood Insurance Study Using the Flood Information Tools (FIT), CHAMP/WHAFIS results along with elevation data were used to develop an input dataset that is compatible with the HAZUS model 10

11 Datasets received from the communities Groton Communities Parcel Database Zoning Number of Floors Year Built Value Size Building Footprint Location of structures Outline used to determine lowest adjacent grade (LAG) Submarine Base New London No detailed data was received from the City of New London. All analysis was performed using Census information 11

12 Basemapping and Data Preparation Using information received from the community in parcel database format a HAZUS User Defined Facility (UDF) dataset was developed The UDF provides a more refined loss estimation The UDF consists of the more detailed structural data 12

13 Basemapping and Data Preparation The UDF database includes attributes such as Occupancy Class, First Floor Elevation, Building Material, Foundation type, Number Year Built, Structure value, Number of Floors, Square Footage, Latitude and Longitude, etc The UDF was then associated with the building footprints provided by the Town The next slide shows an example of the UDF dataset Occupancy Classes 13

14 Basemapping and Data Preparation HAZUS LABEL Occupancy Class RES1 RES3A RES3B RES3C RES3D RES3E RES3F RES4 COM1 COM2 COM3 COM4 COM6 COM7 COM8 COM10 IND1 IND3 EDU1 GOV1 REL1 Single Family Dwelling Multi-Family Dwelling - Duplex Multi-Family Dwelling Units Multi-Family Dwelling Units Multi-Family Dwelling Units Multi-Family Dwelling Units Multi-Family Dwelling Units Temporary Lodging (Hotel) Retail Trade Wholesale Trade Personal and Repair Service Business/Professional/Technical Services Hospital Medical Office/Clinic Entertainment & Recreation Parking Heavy Industrial Food/Drugs/Chemical Schools/Libraries Gerneral Services Church/Membership Organizations 14

15 HAZUS Level 2 Risk Assessment After the engineering analysis was complete for New London County, STARR proceeded with using the Flood Hazard Data This included a detailed model evaluation to estimate the depth of flooding along with the appraiser data for structure values & census information A two step review was completed for both towns 15

16 HAZUS Level 2 Risk Assessment Level 2 analysis using historic flood hazard information and census data Level 2 analysis using detailed engineering data along with census data For the Town of Groton, building specific data was used to provide a more detailed analysis 16

17 July 18, 2011 Effective Flood Information CITY OF NEW LONDON 17

18 HAZUS Level 2 Risk Assessment Total Economic Loss for Full Replacement after damage was $28,108,000 The amount in damage ranged from $0 to $4,830,000 across the census blocks The amount of loss directly correlated to the areas that received the most structural damage 18

19 Land Use Categories The results include both residential and nonresidential parcels, as classified by the zoning codes provided by census tracts Non residential parcels included Commercial, Industrial, Agricultural, Religious, Government and Education classified structures 19

20 Residential Structures Damage 20

21 Economic Loss for Residential Structures 21

22 Building Damage by Land Use Category Building Stock Damage (Total Sq. Feet in Thousands) Residential Commercial Industrial Agricultural Religious Government Education 22

23 Full Replacement Cost by Land Use Category Economic Loss Full Replacement (in Thousands)

24 August 5, 2013 Revised Effective Flood Information CITY OF NEW LONDON 24

25 HAZUS Level 2 Risk Assessment Total Economic Loss for Full Replacement after damage was $40,618,000 (vs. $28,108,000 for previous effective data) which is 44% more The amount in damage ranged from $0 to $5,355,000 across the census blocks 25

26 Residential Structures Damage 26

27 Economic Loss for Residential Structures 27

28 Building Damage by Land Use Category Building Stock Damage (Total Sq. Feet)

29 Full Replacement Cost by Land Use Category Economic Loss Full Replacement ($ Thousands)

30 Comparison of Damage by Risk Assessments Effective Building Stock Damage (Total Sq. Feet) Prelim Building Stock Damage (Total Sq. Feet)

31 Comparison of Full Replacement Cost by Risk Assessments $45,000 $40,000 $35,000 $30,000 $25,000 Effective Economic Loss Full Replacement ($ Thousands) Prelim Economic Loss Full Replacement ($ Thousands) $20,000 $15,000 $10,000 $5,000 $0 31

32 July 8, 2011 Effective Flood Information TOWN OF GROTON AND BOROUGHS 32

33 HAZUS Level 2 Risk Assessment Total Economic Loss for Full Replacement after damage was $206,509,000 The amount in damage ranged from $0 to $31,103,000 across the Occupancy Classes 33

34 Land Use Categories The results include both residential and nonresidential parcels, as classified by the zoning codes provided by the City Non residential parcels included Commercial, Industrial, Agricultural, Religious, Government and Education classified structures 34

35 Residential Structures Damage 35

36 Economic Loss for Residential Structures 36

37 Total Economic Loss $300,000,000 Input Data Comparison $250,000,000 $200,000,000 $150,000,000 $100,000,000 $50,000,000 $0 Census Data ($206,509,000) User Defined Facilities ($279,832,989) 37

38 Building Damage by Land Use Category Building Stock Damage (Total Sq. Feet in Thousands) Residential Commercial Industrial Agricultural Religious Government Education 38

39 Full Replacement Cost by Land Use Category Economic Loss Full Replacement ($ Thousands) $250, $200, $150, $100, $50, $- 39

40 August 5, 2013 Revised Effective Flood Information TOWN OF GROTON AND BOROUGHS 40

41 HAZUS Level 2 Risk Assessment Total Economic Loss for Full Replacement after damage was $268,446,000 (vs. $206,509,000 for previous effective data) The amount in damage ranged from $0 to $36,383,000 across the Occupancy Classes 41

42 Residential Structures Damage 42

43 Economic Loss for Residential Structures 43

44 Total Economic Loss $700,000,000 Input Data Comparison $600,000,000 $500,000,000 $400,000,000 $300,000,000 $200,000,000 $100,000,000 $0 Census Data ($268,446,000) User Defined Facilities ($575,647,214) 44

45 Building Damage by Land Use Category Building Stock Damage (Total Sq. Feet in Thousands) Residential Commercial Industrial Agricultural Religious Government Education 45

46 Economic Loss Full Replacement by Land Use Category Economic Loss Full Replacement ($ Thousands)

47 Comparison of Damage by Risk Assessments Effective Building Stock Damage (Total Sq. Feet) Prelim Building Stock Damage (Total Sq. Feet)

48 Comparison of Full Replacement Cost by Risk Assessments $300,000 $250,000 Effective Economic Loss Full Replacement ($ Thousands) $200,000 $150,000 Prelim Economic Loss Full Replacement ($ Thousands) $100,000 $50,000 $0 48

49 Conclusions Updated SFHA and topographic data provide more accurate results User defined facilities provide more accurate structure information which provides more refined results City of New London July 8, 2011 Effective - $20.8M August 5, 2013 Revised Effective - $40.6M Town of Groton and Boroughs July 8, 2011 Effective - $206.6M August 5, 2013 Revised Effective - $268.4M Damage is consistent across different land use types Level 2 Risk Assessment combined with socio-economic study can better identify true localized community risks 49

50 Contact Amol Daxikar, GISP, CFM CDM Smith/STARR (617)