north carolina cts committee meeting #7 april 17, 2001

North Carolina CTS North Carolina CTS Committee Meeting #7Committee Meeting #7

April 17, 2001

Introduction and Welcome Introduction and Welcome

Scoping/Basin Plans

Status Updates:Status Updates:

Schedule for Schedule for Completing Basin Completing Basin

PlansPlans

White Oak

Lumber

Tar-Pamlico

Cape Fear

Neuse

Pasquotank

12/14/00

12/27/00

1/23/01

2/27/01

4/13/00

5/1/01 (Est.)

May 2001

May 2001

End of May 2001

End of May 2001

June 2001

June 2001

River Basin Draft Date Final Date (Est.)

Final Scoping Final Scoping MeetingsMeetings

Three separate meetings will be held to present the Draft Plan for the Neuse River Basin. Dates and locations include: April 23rd — Raleigh, NC April 24th — Goldsboro, NC April 25th — New Bern, NC

All impacted counties & communities invited

Provides final opportunity for input

Final Scoping Final Scoping MeetingsMeetings

Two separate meetings are planned for the Pasquotank River Basin. Proposed dates and locations include: May 17th — Elizabeth City, NC May 18th — Manteo, NC

Draft Plan for Pasquotank River Basin under preparation

After the Final After the Final MeetingsMeetings

Draft Basin Plan may be revised State’s Floodplain Mapping Contractor

will develop business and technical proposals

Basin Plan will be finalized and notification provided to all impacted counties and communities

Production phase will then begin

Flood Data andMapping Development


White Oak River White Oak River BasinBasin

Negotiations completed Delivery Order finalized Field survey of hydraulic

structures and streams completed Engineering analyses underway

Expected completion mid-May 2001

Lumber River BasinLumber River Basin


structures and streams underway Engineering analyses underway

First of three phases expected to be completed end of May 2001

Tar-Pamlico River Tar-Pamlico River BasinBasin




Cape Fear River Cape Fear River BasinBasin




LIDAR Surveys andDEM Development


Task 1 — LIDAR Data Task 1 — LIDAR Data Acquisition as of 4/10/01Acquisition as of 4/10/01

Watershed Concepts: Data collection is 100% complete

for the White Oak, Tar-Pamlico, Neuse, and Pasquotank River Basins

Greenhorne & O’Mara: Data collection is 90% complete for

the Lumber and Cape Fear River Basins

Task 2 — Generation Task 2 — Generation ofof

Bare-Earth DEMsBare-Earth DEMsWatershed Concepts

Task 2 — Generation Task 2 — Generation ofof

Bare-Earth DEMsBare-Earth DEMsGreenhorne & O’Mara

Task 3 — Generation Task 3 — Generation of TINs and Breaklinesof TINs and Breaklines

Watershed Concepts:

Green = Completed

Orange = In Progress

Blue = Approved Awaiting shipment

of new DOQQs from CGIA

Task 3 — Generation Task 3 — Generation of TINs and Breaklinesof TINs and Breaklines

Greenhorne & O’Mara: Breaklines for

Scotland, Hoke, Montgomery, Moore, and Richmond Counties are complete

TIN development has begun for 21 grids of the Lumber River Basin

LIDAR Quality Control Surveys

Selected Firms for RFQ #19-000018


Quality Control Quality Control SurveysSurveys

LIDAR quality control field work has been completed for the White Oak and Lumber River Basins

LIDAR quality control field work is in progress for the Tar-Pamlico,Cape Fear, and Neuse River Basins

DFIRM Graphic Specifications


NC DFIRM PrototypeNC DFIRM Prototype

North Carolina DFIRM prototype has been developed for review: Three colors Customized border, legend, and title block Customized map symbology 10,000’ x 10,000’ grid tiling “Statewide” mapping

One panel includes all communities/counties in that tile

DFIRM Database Specifications


NC DFIRM DatabaseNC DFIRM Database

North Carolina DFIRM database design underway: Incorporates FEMA’s standard DFIRM

database items Base map data DFIRM features

Enhanced features Field inventory H&H model input and results

Supports future map updates

Partnering


Information Technology Information Technology Requirements Analysis and Requirements Analysis and

Preliminary DesignPreliminary Design

User Requirements User Requirements AnalysisAnalysis

User Requirements Document produced in draft form Summarizes survey and interview

results Establishes set of functional and data

requirements Will serve as basis for system design

Review needed by CTS Committee Location is www.ncfloodmaps.com

http://www.ncfloodmaps.com/



Preliminary System Preliminary System DesignDesign

Preliminary System Design Document available in draft form by April 18th Builds on content of User Requirements

Document Establishes initial design parameters Enumerates options for future detailed

consideration Outlines potential implementation risks

Next Steps for IT Next Steps for IT ComponentComponent

Finalize User Requirements Document Finalize Preliminary System Design

Document Develop schedule and work content for

Detailed Design and Implementation Phase

Prepare and issue Delivery Order for next phase

Base Map Data Base Map Data Collection/Community Collection/Community

PartneringPartnering

Working Group Working Group Reports/Updates:Reports/Updates:

Higher Standards

Preliminary/Post-Preliminary/Post-Preliminary Processing forPreliminary Processing for

NC FISs and FIRMsNC FISs and FIRMs

Current FEMA Current FEMA ProcessingProcessing

Preliminary FIS and FIRM issued 30-day comment period Final Community Meeting Publication of proposed flood

elevation determination in Federal Register and twice in local newspaper

Community notified by letter

(continued)

Current FEMA Current FEMA ProcessingProcessing

90-day appeal period initiated by second newspaper publication

Any appeal/protests resolved Letter of Final Determination issued

(establishes effective date of FIS and FIRM and begins 6-month compliance period

FIS and FIRM become effective; distributed by Map Service Center

Process typically requires 1 to 1½ years

6-Month Compliance 6-Month Compliance PeriodPeriod

To participate in the NFIP, communities must comply with Section 60.3 of the NFIP regulations

Section 60.2 requires that FEMA give communities 6 months to adopt/update ordinances that comply with Section 60.3 criteria.

Land Management and Use Land Management and Use CriteriaCriteria

YesYesYesYes60.3(d) & (e)

YesNoYesYes60.3(e)

NoYesYesYes60.3(d)

NoNoYesYes60.3(c)

NoNoNoYes60.3(b)

NoNoNoNo60.3(a)

V Zones

Floodways

BFEs100-Year Flooding

Land-Use Classificati

on

Type of Flood Hazard InformationShown on FIRM

Compliance withCompliance with60.3 Criteria60.3 Criteria

Most North Carolina communities have adopted 60.3(d)- and 60.3(e)-level model ordinances even without a floodwayand V zones

Most NC community ordinances specify that they apply as of the date of initial community NFIP map and “to any subsequent revisions”

For these communities, current ordinances will be adequate, and 6-month compliance period will not be needed

Others will have to update ordinances

Post-Preliminary Processing for Post-Preliminary Processing for NC Counties in More than 1 NC Counties in More than 1

BasinBasin Majority of Phase I North Carolina

counties located in more thanone basin

Engineering for basins will not be completed at the same time

Engineering for portions of counties may be completed as much as a year before the other portions (longer for counties located partially in Phase II basins)

Post-Preliminary Processing for Post-Preliminary Processing for NC Counties in More than 1 NC Counties in More than 1

BasinBasin Method of post-Preliminary

processing must: Meet all statutory and regulatory

requirements for due process Reduce time frames as much as

possible Be cost effective

Recommended Recommended MethodMethod

Issue a Preliminary when the basin is completed, but include only the portion of the county in the basin

Initiate the 90-day appeal period for the Preliminary

When the other basin(s) are complete, issue a revised Preliminary(s) that includes the rest of the county and proceed with 90-day appeal period


If a basin affects only a portion of a panel, the Preliminary will be issued for all panels affected by the basin

For portion of panel not affectedby basin, base map informationwill be shown but not flooding information—Note on FIRM will refer users to effective map for flood hazard information in that area


To Expedite Processing: Schedule news releases to take place

within 1 week of issuance of the Preliminary

With Preliminary, notify community that 90-day appeal period will begin with the second news release and that the Final Meeting will be conducted during the first month of issuance of Preliminary

(continued)


To Expedite Processing: Thorough outreach should reduce number

of technical appeals and protests, thus making it safe to initiate the appeal period prior to the final meeting

When the basins for other parts of county are completed, use the same process

(continued)


To Expedite Processing: When State initiates engineering and

mapping for subsequent basins, give priority to areas within the basin that will complete the county

When last Preliminary for county is issued, provide notice of the appeal period and provide the effective date of the FIS and FIRM to begin the 6-month compliance period (continued)


To Expedite Processing: 6-month compliance period and last 90-

day appeal period will run concurrently Final Meeting will be conducted during

first month of issuance of Preliminary FIRM

Appeals will be processed on acase-by-case basis, depending onextent of area affected

(continued)


To Expedite Processing: Approach for counties partially in

Phase II basins will be more flexible If time lag might be more than a year,

effective information for portion in Phase II might be digitized and used to develop the initial county FIS and FIRM

When Phase II basin is complete, a revision would be processed


Final maps will become effective within approximately 7 months after issuance of final Preliminary for the county as compared to 1 to 1½ years with FEMA’s standard process


For 7 of the counties that are split between basins, Watershed Concepts is going to make complete county submissions.

For these counties, the complete countywide Preliminary FIS and FIRM can be issued and the 6-month compliance period will begin as soon as the Preliminary is issued. The90-day appeal period will begin with the second Public Notice.

Preparation for Preliminary Preparation for Preliminary and Post-Preliminary and Post-Preliminary

ProcessingProcessing State and FEMA will begin

researching community ordinances to identify communities that will have to update their ordinances

DFIRM Production:DFIRM Production:Priority Listing of Priority Listing of

CountiesCounties

Phase I CountiesPhase I Counties

Engineering, mapping, and DFIRM production in the White Oak, Lumber, and Tar-Pamlico River Basins prioritized by county

Priority consideration given to (1) the anticipated impact of new mapping,(2) if the county is within multiple basins, and (3) contractor’s ability to complete county study by 09/30/2001

White Oak River White Oak River Basin Priority ListingBasin Priority Listing

1.Carteret

2. Onslow

3. Jones

Yes

No

No

Mid-July

Mid-July*

Mid-July*

Complete County?

Estimated Prelim. Date

*For the portion of the White Oak River Basin

County

Lumber River Basin Lumber River Basin Priority ListingPriority Listing

1.Columbus

2.Brunswick

3. Scotland

4. Robeson

5. Hoke

No

No

No

No

No

End of Sept*

End of Sept*

End of Sept*

End of Oct*

Mid-Sept*

Complete County?


*For the portion of the Lumber River Basin

County

Lumber River Basin Lumber River Basin Priority Listing Priority Listing

(cont’d)(cont’d)

6. Bladen

7.Montgomery

8. Richmond

9. Moore

No

No

No

No

Mid-Sept*

End of Aug*

End of Aug*

Mid-Sept*

Complete County?


*For the portion of the Lumber River Basin

County

Tar-Pamlico River Tar-Pamlico River Basin Priority ListingBasin Priority Listing

1. Edgecombe

2. Franklin

3. Pitt

4. Nash

5. Beaufort

Yes

Yes

Yes

Yes

Yes

Mid-Aug

Mid-Sept

Mid-Aug

Mid-Aug

End of Sept

Complete County?

Estimated Prelim. DateCounty

Tar-Pamlico River Tar-Pamlico River Basin Priority ListingBasin Priority Listing

6. Hyde

7. Warren

8. Halifax

9. Granville

10. Martin

11. Vance

Yes

No

No

No

No

No

End of Sept

End of Sept*

Mid-Oct*

Mid-Oct*

End of Oct*

End of Oct*

Complete County?


*For the portion of the Tar-Pamlico River Basin

County

Overall County Overall County PriorityPriority

12) Beaufort13) Hyde14) Warren*15) Halifax*16) Hoke*17) Granville*18) Martin*19) Vance*20) Bladen*21) Montgomery*22) Richmond*23) Moore*

1) Carteret2) Onslow*3) Columbus*4) Jones*5) Brunswick*6) Edgecombe7) Franklin8) Pitt9) Scotland*10) Nash11) Robeson*

*DFIRM production completed for only a portion of the county by September 30, 2001.

How Will Flood Elevation How Will Flood Elevation Data for Approximate Data for Approximate Areas Be Depicted onAreas Be Depicted onNorth Carolina FIRMs?North Carolina FIRMs?

How were Zone A Areas How were Zone A Areas on FEMA’s FIRMs on FEMA’s FIRMs

determined?determined? Designate a Special Flood Hazard

Area where FEMA has not determinedBase Flood Elevations Regulatory definition of Zone A in 44 CFR 64.3

Typically based on rudimentary calculations or other data source For example, regression equations and normal

depth computations; USGS floodprone quadrangle maps; hydric soils data

What is Approximate Study What is Approximate Study Method Method

for NC Flood Mapping Program?for NC Flood Mapping Program? Based on H&H analyses using DEMs

Regression equations for discharges HEC-RAS models for flood profiles

Key difference from Detailed StudyMethod—bridge geometry will not be surveyed and cross sections will not include bathymetric data Where bridge geometry is readily available, coding

of bridge geometry will be attempted

“Buildable” analyses—can be upgraded later to full detailed study

How can NC’s Flood Elevation How can NC’s Flood Elevation Data for Approximate Areas be Data for Approximate Areas be

used?used? Floodplain management Flood insurance policy rating

Rates are typically higher in A zones than in AE zones because risk is less well known

If BFE can be provided, rates are more actuarially based

How Will Flood Elevation DataHow Will Flood Elevation Datafor Approximate Areas will be for Approximate Areas will be

depicted on NC FIRMs?depicted on NC FIRMs?

Publish on the FIRM as BFEs Designate zones as AE Provide Statutory 90-day appeal

period As required by 42 USC § 4104[a] Appeals must be based on scientific

or technical data

How will BFEs in Approximate How will BFEs in Approximate Areas be distinguishable from Areas be distinguishable from

Detailed Areas? Detailed Areas? On FIRM:

No floodway or 500-year floodplain Considering alternate symbology for BFEs

In Flood Insurance Study Report: Profiles will have only 100-year profile Peak discharge table will only have

100-year discharge No Floodway Data Table Different methodology for determining BFEs

will be explained

What are the What are the Benefits of this Benefits of this

Approach?Approach? Elevation data for approximate areas

will be readily available for floodplain managers and flood insurance agents

Elevation data will carry more weight Communities will be required to follow

more stringent 60.3(c) requirements versus 60.3(b) “best available data” requirements

What are the potential What are the potential drawbacks of this drawbacks of this

approach?approach? Showing BFEs may imply higher

degree of accuracy than warranted

May result in more appeals Impacts time and cost

Why not show the Why not show the approximate flood approximate flood

elevations as “AFEs” and elevations as “AFEs” and treat them as “Best treat them as “Best

Available Data”?Available Data”? FEMA’s regulations and governing

statutes do not permit this. In order to portray the AFEs on the

FIRMs and treat them as “Best Available Data,” an extensive rulemaking process would be required. Scheduling does not permit this.

Local Contributions toLocal Contributions tothe NC Mapping Effortthe NC Mapping Effort

Potential Pilot forPotential Pilot forLOMA DelegationLOMA Delegation

Potential Pilot for Potential Pilot for LOMA/LOMR-F LOMA/LOMR-F

DelegationDelegation FEMA is considering delegation of

LOMA/LOMR-F issuing authority to engineers and surveyors

North Carolina Society of Surveyorshas volunteered to work with North Carolina Geodetic Survey ona potential pilot

FEMA’s CommunityFEMA’s CommunityRating System (CRS)Rating System (CRS)

CRS BackgroundCRS Background

Founded in 1990 and Codified in the Flood Insurance Reform Act of 1994

Flood insurance premiums are adjusted to reflect reduced risk resulting from activities that meet the three CRS goals: Reduce flood losses Facilitate accurate insurance ratings Promote awareness of flood insurance

BenefitsBenefits

Reduced flood insurance premiums for property owners

Enhanced Public Safety Reduction in damage to property, public

infrastructure, and human suffering Avoidance of economic disruption and losses Protection of the environment Allows a community to evaluate itself against a

nationally recognized benchmark Provides technical assistance in providing and

implementing activities

Benefits (cont’d)Benefits (cont’d)

Reduced Premiums Class 1 — 45% Class 2 — 40% Class 3 — 35% Class 4 — 30% Class 5 — 25%

Class 6 — 20% Class 7 — 15% Class 8 — 10% Class 9 — 5% Class 10 — n/a

CRS Recognized CRS Recognized ActivitiesActivities

18 recognized activities eligible forCRS credit points 300 Series Activities — Public information

activities 400 Series Activities — Mapping and regulatory

programs focused on new development 500 Series Activities — Damage reduction

programs where current development is at risk 600 Series Activities — Flood preparedness

programs, flood warning and levee and dam safety programs

Participating Participating CommunitiesCommunities

Communities receive a ranking between 1 and 10

9 is for the minimum amount of activities required to receive a reduced premium (5%)

As of October 1, 2000, there were 926 participating communities nationwide: 5 with a Class 10 rating 431 with a Class 9 rating 352 with a Class 8 rating 110 with a Class 7 rating 27 with a Class 6 rating 1 with a Class 3 rating

ParticipatingParticipatingNorth Carolina North Carolina CommunitiesCommunities

North Carolina currently has 74 participating communities that are Class 9 and lower, including: 44 Class 9 24 Class 8 4 Class 7 2 Class 6 (the Towns of Southern Shores

and Wrightsville Beach)

Action Items/Wrap UpAction Items/Wrap Up

north carolina cts committee meeting #7 april 17, 2001

Documents

cape fear river basinstask

final meetingsdraft

beginstatus updates

generation of tins

data collection

lidar data acquisition

welcome status updates

flood data