north carolina floodplain mapping program becoming a cooperating technical state

NC Floodplain Mapping ProgramNC Floodplain Mapping Program

North Carolina

Floodplain Mapping Program

Becoming a

Cooperating Technical State


• Background

• Overview of NC Floodplain Mapping Program

• Overview of the Assessment / Scoping Process for the six (6) initial River Basins

• Questions and Answers

• Wrap Up

Topics for Today


Needs / Limitations Identified

• Hurricane Floyd revealed data and map limitations

• FEMA program – North Carolina receives on average one updated Flood Study for one county per year

• Only 10-25% of flood hazards in county are evaluated

• ~ 55% of NC FIRMs are at least 10 years old


Needs / Limitations Identified (continued)

• ~ 75% of NC FIRMs are at least 5 years old

• Many up-to-date maps are using 15-20 year old studies

• Many counties and communities have indicated that they do not have resources to take on responsibility


FEMA Flood Insurance Rate Maps in North Carolina

Mapped Areas• 100 Counties• 326 Municipalities

Not Mapped• 214 Municipalities


In response to these defined limitations, North Carolina has developed two strategies:

• Establishment of a statewide program to acquire, process and disseminate current, accurate, and detailed elevation data, flood studies, and maps.

• Establishment of North Carolina as a Cooperating Technical State (CTS) with FEMA.


Program Deliverables

• Up-to-date maps (Flood Insurance Rate Maps) being provided to state and local officials (Study Basin by Basin)

• Up-to-date elevation data being provided to state and local officials (2 Feet or Less Vertical Accuracy /95%)

• Reduction of time needed for reviewing and approving proposed changes to FIRM maps (~6-7 months)

• Notification and dissemination of information about new and revised maps being provided to local governments, insurance agents, and citizens


Program Deliverables (continued)

• On-going program for updating and maintaining FIRMs • Post-event mitigation activities being better equipped

and supported with timely updates to flood risk maps• Interoperable GIS• Dissemination of data and maps via the Internet• Next generation information architecture• E-gov• Develop real time prediction of flooding


Project Schedule

• 5 year statewide program

• 6 river basins completed by August 2002

• 3 river basins before September 2001

• State approval of program August 2000


Program Management

• Office of State Budget, Planning and Management– Center for Geographic Information & Analysis– Geodetic Survey

• NC Division of Emergency Management• Federal Emergency Management Agency


Estimated Project Costs

Component Priority Basins Statewide

Elevation and Base Data $9,000,000 $18,000,000

Flood Modeling and Maps 22,500,000 42,000,000

Project Management 1,500,000 1,500,000

TOTAL $33,000,000 $61,500,000

Non-recurring Management Costs 600,000

Recurring Management Costs 900,000


Overview of the Assessment / Scoping Process for the

first six River Basins


What Is Scoping?

• Researching/inventorying available elevation, flood hazard, and digital base map data

• Assessing adequacy of existing flood hazard data

• Receiving input from counties and communities

• Determining best method to update flood data


• Identifying data needs (DEMs, cross sections, base maps, etc.)

• Determining proposed scales and paneling scheme for DFIRM production

• Establishing priority levels

• Developing schedule

What Is Scoping? (continued)


• North Carolina will work closely with FEMA and FEMA’s Mapping Coordination Contractor, Dewberry & Davis LLC

• Process will involve 5 steps

How Will Scoping Be Accomplished?


State

State

FEMA

FEMA

KickoffMeeting with County/Local

Floodplain Administrators

MappingNeeds

Assessment

EffectiveFIS & FIRM Research

EvaluatePost-Floyd

Data

NCScoping

Database

Generate Initial

Scoping Package

InitialScoping Meetings

Develop Draft Basin Plans

Final Scoping Meetings

Finalize BasinPlans

Process for Scoping Six River Basinsin Eastern North Carolina

Prepare Delivery Orders& CTC

Mapping Activity

Agreements & Update

CTS Mapping

Agreement

Analysis and

Mapping

Step 1

Initial Research and Community

Coordination

Step 2

Initial Scoping Meeting

Step 3

Draft Basin Plans

Step 4

Final Scoping Meeting

Step 5

Final Basin Plans

SCOPING PRODUCTION

Questionnaire


• Today’s kickoff meeting—community questionnaire

• Complete Assessment of Community Mapping Needs (CTC Agreement)

• FEMA will research FIS/FIRM and other data for each community

• With FEMA, evaluate post-Hurricane Floyd data

Step 1 – Initial Research and Community Coordination


• Your response is very important!

• Information you provide will assist the State in developing Statewide inventory of flood mapping needs

• Have questions or need help completing the questionnaire?

– Call (877) 336-2627 (toll free)

Community Questionnaire


• Please send the completed assessment form (mail, fax, or e-mail) to Ken Taylor

– Submission information is contained in the questionnaire

• Digital version of questionnaire available (in MS Excel format)– E-mail request to [email protected]

• Please submit by September 29, 2000

Community Questionnaire (continued)


• Meetings in each county

• Present results of Step 1 research

• Ask for community input

• Meet individually with county and each community’s representatives

• Each county and community will be contacted to schedule the meeting

Step 2 – Initial Scoping Meetings


• Synthesize research and community input

• Draft basin plans will include:

– Comprehensive lists of flooding sources to be updated

– Counties for which DFIRMs will be produced

– Overall schedule

Step 3 – Draft Basin Plans


• Meetings held in each basin

• Two or three separate meetings may be held in larger basins

• All impacted counties and communities will be invited

• Present draft basin-wide plans

• Provide final opportunity for input

Step 4 – Final Scoping Meeting


• Final basin plans will be used to:

– Complete CTS Task Agreement with FEMA

– Develop Delivery Orders for our mapping contractor

– Develop CTC Mapping Activity Agreements with any counties or local communities

– Production phase will then begin

Step 5 – Final Basin Plans


White Oak3 counties

partially or entirelywithin basin

Tar Pamlico12 counties


Lumber7 counties


Neuse16 counties


Cape Fear15 counties


Pasquotank8 counties


September October November December January February

Basin

51 2 3 4

54321

1 2 3 4 5

1 2 3 4 5

1 2 3 4 5

1 2 3 54


• Engineering analyses and mapping completed on basin-wide basis

• Results “carved” into countywide DFIRMs

• Work conducted by State contractor

• Preliminary DFIRMs for three basins by August 2001

• Preliminary DFIRMs for other three basins by August 2002

What Happens After Scoping?

north carolina floodplain mapping program becoming a cooperating technical state

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