Proven People... Proven Technology... Proven Results Digital Flood Insurance Rate Map Panel Management Module Katherine Hermann, CFM, Dewberry Ken Logsdon,

Proven People...Proven Technology...Proven Results

Digital Flood Insurance Rate Map Panel Management Module

Katherine Hermann, CFM, Dewberry

Ken Logsdon, Jr., Dewberry


DFIRM Updates Beyond MapMod

• Many DFIRMs and flood data were digitized in MapMod

• If restudies are needed in Risk MAP, updated DFIRMs need to have suffixes updated/advanced

• Additionally, new flood hazard data should be clipped into the countywide database


Traditional DFIRM Suffix Updates and Issuances• Suffixes are updated manually by reviewing

current effective and historical DFIRMs• Routing forms used for issuances are created

manually in a spreadsheet• Human analysis needed to determine which

communities are affected by stream restudies • Possibility of human error is higher when

evaluating revisions with larger numbers of panels


NC Floodplain Mapping Program• North Carolina / FEMA CTP agreement in 2000• Dewberry performs NCFMP QA/QC and Program

Management– Receive project data from 4 study contractors– Quality Review all Engineering Models and DFIRMs,

over 9,700 panels in North Carolina– Finalize all DFIRMs and DFIRM databases

• First statewide mapping effort is complete• Map maintenance program will issue maps via PMRs

in a statewide paneling scheme


Issue: How to improve efficiency? • First, a few considerations:

– NC map maintenance analyses stream restudies by a watershed-basis but must issue DFIRMs frequently along county boundaries

– NC map maintenance stream restudies are NOT clipped to county/community boundaries, all flood hazards must be shown across corporate limits

– Some panels can be issued preliminary and effective multiple times for different counties


Issue: How to improve efficiency?

• Investigated using countywide DFIRM databases– Looked at preliminary DFIRM databases– Use SDE to allow for versioning and date-

stamping of submitted data– Find a way to automate the processing

forms


Answer: Panel Management Module

• Develop a panel management module that will:– Visually review impacts of adjacent county

mapping initiatives– Auto-assign panel suffixes– Track DFIRM issuances and the data revised









Preliminary Issuance Management


Next Steps

• Begin to track: – Appeals and protests– CLOMRs and LOMRs– Graphical Errors – Other related product reviews, such as base

data


Summary

• Used to archive and track revised DFIRMs and flood hazard data

• Creates automated routing forms • Spatially updates panel suffixes with increased

quality• Allows users to see new flood hazards in a

regional or statewide view• Categorizes and tracks preliminary and

effective new flood hazard data


QUESTIONS?

Thank you!

Documents

Proven People... Proven Technology... Proven Results Digital Flood Insurance Rate Map Panel Management Module Katherine Hermann, CFM, Dewberry Ken Logsdon,