AMENDMENTS TO CHAPTER 50: FLOODPLAIN DEVELOPMENT

Transcription

1 AMENDMENTS TO CHAPTER 50: FLOODPLAIN DEVELOPMENT PART I: 2018 FLOOD MAP IMPLEMENTATION PART II: STRATEGIES TO IMPROVE THE CITY S COMMUNITY RATING SYSTEM SCORE

2 NATIONAL FLOOD INSURANCE PROGRAM (NFIP) CREATED WITH TWO GOALS IN MIND: 1. TO PROVIDE FLOOD INSURANCE FOR STRUCTURES AND CONTENTS IN COMMUNITIES THAT ADOPT AND ENFORCE AN ORDINANCE OUTLINING MINIMAL FLOODPLAIN MANAGEMENT STANDARDS. 2. TO IDENTIFY AREAS OF HIGH AND LOW FLOOD HAZARD AND ESTABLISH FLOOD INSURANCE RATES FOR STRUCTURES INSIDE EACH FLOOD HAZARD AREA.

3 FLOOD INSURANCE RATE MAPS (FIRM) FIRST MAPS IN DES MOINES WERE ISSUED IN CURRENT MAPS (EFFECTIVE MAPS) FOR POLK COUNTY DATED WARREN COUNTY MAPS HAD RECENT REVISION IMPLEMENTED IN MAPS CAN BE REVISED BY PROCESS CALLED LETTER OF MAP REVISION (LOMR) OR LETTER OF MAP AMENDMENT (LOMA).

4 FLOOD INSURANCE RATE MAPS (FIRM) NEW MAPS (REFERRED TO AS PRELIMINARY MAPS) PUBLISHED IN 2015 LOCAL MUNICIPALITIES WERE GIVEN APPEAL PERIOD TO PROVIDE COMMENTS TO FEMA (DES MOINES HAD TWO APPEALS) REVISED PRELIMINARY MAPS PUBLISHED IN 2018 EFFECTIVE DATES SET FOR WARREN COUNTY (NOVEMBER 16, 2018) AND POLK COUNTY (FEBRUARY 1, 2019)

5 2018 FIRM S - IMPACTS TO PROPERTY OWNERS PROPERTIES LOCATED WITHIN THE SPECIAL FLOOD HAZARD AREA (SFHA): 2,500+ PROPERTIES BEING ADDED OR PARTIALLY ADDED TO THE SFHA: 812 PROPERTIES BEING REMOVED OR PARTIALLY REMOVED FROM THE SFHA: 538 NUMBERS ARE ESTIMATED BASED ON GIS RECORDS AND PAST MAILING LISTS

6 CURRENT MAP FOUR MILE CREEK PROPOSED MAP

7 CURRENT MAP FAIRGROUNDS PROPOSED MAP

8 COMMUNITY RATING SYSTEM (CRS) OVERVIEW THE NFIP COMMUNITY RATING SYSTEM (CRS) WAS IMPLEMENTED IN 1990 AS A VOLUNTARY PROGRAM FOR RECOGNIZING AND ENCOURAGING COMMUNITY FLOODPLAIN MANAGEMENT ACTIVITIES EXCEEDING THE MINIMUM NFIP STANDARDS. UNDER THE CRS, FLOOD INSURANCE PREMIUM RATES ARE DISCOUNTED TO REWARD COMMUNITY ACTIONS THAT MEET THE THREE GOALS OF THE CRS, WHICH ARE: (1) REDUCE FLOOD DAMAGE TO INSURABLE PROPERTY; (2) STRENGTHEN AND SUPPORT THE INSURANCE ASPECTS OF THE NFIP; AND (3) ENCOURAGE A COMPREHENSIVE APPROACH TO FLOODPLAIN MANAGEMENT.

9 COMMUNITY RATING SYSTEM (CRS) SCORING GOAL TODAY THE CRS USES A CLASS RATING SYSTEM TO DETERMINE FLOOD INSURANCE PREMIUM REDUCTIONS. CLASSES ARE RATED FROM 10 (WORST) TO 1 (BEST). A COMMUNITY ACCRUES POINTS TO IMPROVE ITS CRS CLASS RATING AND RECEIVE INCREASINGLY HIGHER DISCOUNTS. POINTS ARE AWARDED FOR ENGAGING IN CREDITABLE ACTIVITIES.

10 CRS SCORE - CITY OF DES MOINES CITY OF DES MOINES CURRENTLY A CLASS 7 COMMUNITY WITH 1,853 POINTS. THIS RESULTS IN A 15% PREMIUM REDUCTION FOR PROPERTIES IN A SPECIAL FLOOD HAZARD AREA (SFHA) AND A 5% PREMIUM REDUCTION FOR PROPERTIES NOT IN A SFHA. WITH 147 MORE POINTS, CLASS 6 COMMUNITY 20%/10% PREMIUM REDUCTION WITH 647 MORE POINTS, CLASS 5 COMMUNITY 25%/10% PREMIUM REDUCTION

11 CRS COMPARISONS TO OTHER COMMUNITIES AS OF MAY 1, 2018, THE STATE OF IOWA HAS 11 COMMUNITIES PARTICIPATING IN THE CRS PROGRAM ONE CLASS 5 COMMUNITY: CEDAR FALLS THREE CLASS 6 COMMUNITIES: CLIVE, CEDAR RAPIDS, AND IOWA CITY ONLY 13 COMMUNITIES NATIONWIDE WITH A RATING OF CLASS 4 OR HIGHER

12 BEST WAYS TO INCREASE CRS SCORE I. COMPENSATORY STORAGE REQUIREMENT II. III. INCREASE FREEBOARD REQUIREMENT ENCLOSURE LIMIT RESTRICTIONS IV. CUMULATIVE SUBSTANTIAL IMPROVEMENT TRACKING

13 ACTIVITY 432.A COMPENSATORY STORAGE REQUIRES NEW DEVELOPMENT TO PROVIDE COMPENSATORY STORAGE AT HYDRAULICALLY EQUIVALENT SITES. 195 POINTS FOR 1.5 : 1 RATIO (IMPROVEMENT)

14 ACTIVITY 432.A COMPENSATORY STORAGE PROTECTS ADJACENT PROPERTIES IN THE FLOODPLAIN

15 ACTIVITY 432.B FREEBOARD CITY OF DES MOINES ALREADY HAS A FREEBOARD REQUIREMENT OF ONE FOOT ABOVE BASE FLOOD ELEVATION (BFE). 275 POINTS FOR BFE +3 FEET WHEN COMBINED WITH A COMPENSATORY FILL REQUIREMENT, POINTS INCREASE TO 340. STANDARD LEVEE PROTECTION UTILIZES A 3 FREEBOARD FROM THE BASE FLOOD LEVEL.

16 ACTIVITY 432.G ENCLOSURE LIMIT RESTRICTIONS PROHIBITS ENCLOSURES BELOW THE BASE FLOOD ELEVATION (EXCLUDING CRAWL SPACES WITH APPROVED FLOOD VENTING). 240 POINTS FOR PROHIBITING ALL ENCLOSURES. PARTIAL CREDIT (100 POINTS) FOR ALLOWING ENCLOSURES LESS THAN 300 SQUARE FEET IN AREA. ADDITIONAL PARTIAL CREDIT (60 POINTS) FOR REQUIRING THE OWNER TO SIGN A NON- CONVERSION AGREEMENT.

17 ALL OTHER NEW CONSTRUCTION & SUBSTANTIAL IMPROVEMENTS BFE +3 LOWER RISK DETACHED ACCESSORY STRUCTURE FOR SINGLE-FAMILY OR TWO-FAMILY RESIDENTIAL USE (>300 SQUARE FEET) BFE HIGHER RISK DETACHED ACCESSORY STRUCTURE FOR SINGLE-FAMILY OR TWO-FAMILY RESIDENTIAL USE (<300 SQUARE FEET)

18 ACTIVITY 432.D CUMULATIVE SUBSTANTIAL IMPROVEMENT / DAMAGE TRACKING ENSURES THAT THE TOTAL VALUE OF ALL IMPROVEMENTS, ADDITIONS, REPAIRS, AND RECONSTRUCTION THAT IS PERMITTED OVER TIME DOES NOT EXCEED 50% OF THE VALUE OF THE STRUCTURE WITHOUT ELEVATING OR FLOODPROOFING SAID STRUCTURE. 40 POINTS FOR TRACKING OVER SPAN OF 5 YEARS. 80 POINTS FOR TRACKING OVER SPAN OF 10 YEARS.

19 RECOMMENDED ORDINANCE AMENDMENTS COMPENSATORY FILL REQUIREMENT AT 1.5 : 1 RATIO: FREEBOARD REQUIREMENT OF BFE +3 FEET: ENCLOSURE LIMIT RESTRICTION (>300 SF + NON-CONVERSION AGREEMENT): TRACK SUBSTANTIAL IMPROVEMENTS OVER SPAN OF 10 YEARS: 195 POINTS 340 POINTS 160 POINTS 80 POINTS (647 NEEDED FOR CLASS 5 RATING) 775 POINTS

20 POTENTIAL ECONOMIC IMPACTS HOW MUCH DOES IMPROVING FROM A CLASS 7 TO A CLASS 5 SAVE ME? $265 $442 AVERAGE ANNUAL SAVINGS FOR SFHA PROPERTIES: $177 / YEAR

21 QUESTIONS? SOURCES / PHOTO CREDITS: FEDERAL EMERGENCY MANAGEMENT AGENCY (FEMA.GOV) (FLOODSMART.GOV) COMMUNITY RATING SYSTEM (2017 CRS COORDINATOR S MANUAL) (CRSRESOURCES.ORG) IOWA DEPARTMENT OF NATURAL RESOURCES (IOWADNR.GOV) DES MOINES REGISTER (DESMOINESREGISTER.COM) URBAN DSM WEBSITE (URBANDSM.COM)