Presentation Transcript

1. Floodplains and Permitting in Charlotte/Mecklenburg Waller Lunch and Learn June 22, 2012
2. Overview Floodplain Basics & Background Floodplains in Charlotte-Mecklenburg Flood Insurance Floodplain Permitting
3. Watersheds “Top of the hill” Charlotte - 5% of land area is within a floodplain
4. What is a Floodplain ? Floodplains are those areas commonly inundated by flooding. Floods result when water runoff exceeds the capacity of stream and river channels or lake basins. FEMA Map Drains One Square Mile Area
5. What is 100- Year Flood? A flood that has a 1% (1in 100) chance of occurring in any year.
6. “Regulated” Floodplains vs. “100+1’ Flood Lines” “100+1’ Flood Line” or “Building Restriction Floodline” or “Stormwater Elevation Line” Smaller Creeks (less 1 sq. mi.) 100-year+1ft - Subdivision Ordinances No Flood Insurance Required
7. Government Hierarchy Department of Homeland Security FEMA – Federal Emergency Management Agency (Created in 1979) NFIP – National Flood Insurance Program Created 1969 Housed under FEMA NCEM – North Carolina Emergency Management - Guidance Charlotte/Mecklenburg/Towns
8. National Flood Insurance Program 1- Guide future development away from flood hazard areas; 2- Require that new and substantially improved buildings be constructed to resist flood damage; 3- Provide homeowners with financial assistance after floods, especially after smaller floods that do not warrant federal disaster aid, and; 4- Transfer some of the costs of flood losses from the taxpayers to the property owners.
9. Background: Floodplains Evolution of Floodplain Maps & Regulations 1978 – First Charlotte Ordinance and Maps 2002 -NC Floodplain Mapping – 99 Counties 2004– FEMA published updated Maps 2009 – Charlotte maps reformatted to meet NC Mapping Grid 2012 and beyond – New Floodplain Maps
10. Charlotte/Mecklenburg City/County Joined NFIP in late 1970’s Administered by Zoning Dept until early 1980’s County Engineering took over in early 1980’s County Storm Water Created- 1994
11. New Floodplain Maps Revised Floodplain Elevations and Widths Briar, Little Sugar, McAlpine, McMullen Creeks Preliminary Maps Complete Overall, Floodplain Widths and Depths Going Down Maps for Other Creeks Will Follow
12. 2016 2014 2013
13. Sources of Floodplain Information (Maps) POLARIS (Mecklenburg County Website) 3D Flood Zone Application (Storm Water Services Website) Paper FIRM Maps (FEMA, County Storm Water Services) Subdivision Recorded Maps (Flood Info could be outdated if maps have changed)
14. Mecklenburg County Floodplains Higher Standards Two Floodplains - FEMA (Existing Land Use) Floodplain - Community (Future Land Use) Floodplain Wider “Floodway” (Very Restricted) Areas Improvements/Additions to Floodprone Buildings(cumulative requirement) Access to buildings during a flood (Driveway Requirements) Parking Lot Requirements
15. Existing Landuse:
16. Future Landuse(ultimate buildout):
17. Major Regulations Impacting Buildings New Construction Lowest Floor and Mechanical Equipment 1’ Above Future Flood Level Very Restricted Development in “FEMA Floodway” and “Community Encroachment” Areas
18. Improvements/Additions to Floodprone Buildings Substantial Improvement One Improvement over 50% of Building Value or Two Improvements within a 10-year Period, Each Over 25% of Building Value
19. Flood Insurance Required if Building Footprint Located in FEMA Floodplain and Mortgage Not Required if Building in Community Floodplain Rate Based on Difference Between Lowest Floor and FEMA Flood Elevation
20. Flood Insurance (Cont.) Anyone Can Buy Flood Insurance in Charlotte-Mecklenburg CRS – 25% Discount in Charlotte 20% Discount Mecklenburg & Pineville Flood Insurance Requirement Can Be Removed With FEMA Letter (LOMA, LOMR-Fill) LOMA, LOMR-Fill - Shown on 3D FloodZoneWebsite
21. Floodprone Buildings FEMA (Existing Land Use) Floodplain 4000 +/- buildings 700 +/- flood into living space Most Built Before Floodplain Maps (Pre- 1978)
22. Floodplain Information on POLARIS
23. POLARIS Does Not Show Community Encroachment Area or FEMA Floodway Encroachment Area (Additional Restrictions Apply) Shows Community Floodplain and FEMA Floodplain
24. 1. Click on “Parcel Info” 2. When the Parcel Info Appears, Scroll Down to the Bottom 3. Click On “Floodplain, Zoning & Watershed Info”
25. Clicking Here Will Take You to 3DInteractiveFlood Zone Mapping Site That Provides More Detailed Floodplain Information.
26. 3D FloodZone Interactive Mapping Website http://mapserver. mecklenburgcountync.gov/3dfz/
27. Permitting in the Floodplain
28. Permitting in the Floodplain
29. When is a Floodplain Development Permit (FDP) Required? A Floodplain Development Permit is requiredfor all proposed development in the floodplain.Development means “any manmade change to improved and unimproved real estate, including, but not limited to, buildings or other structures, mining, dredging, filling, grading, paving, excavating or drilling operations.”
30. Broad Definition of Development Examples of Development Include: Road Crossings or Culverts Residential Subdivisions Waste Water Treatment Facilities Stream Restoration Projects Greenways Commercial Development
31. Two Types Floodplain Development Permits (FDP’s) General Floodplain Development Permit (GFDP). Created to enable review of development projects with no impact to be streamlined . Individual Floodplain Development Permit (IFDP). Covers all other projects that do not qualify as GFDP.
32. General FDP General Floodplain Development Permit is for maintenance projects or underground utilities not changing the topography. Project manager is required to notify the Floodplain Administrator in advance.
33. General FDP Utility infrastructure (poles, sewer manholes, vent pipes, underground utilities, etc.), sign poles, non-solid fences
34. Examples of GFDP General farming, pasture, horticulture, forestry, wildlife sanctuaries, gardens, lawns, landscaping
35. Examples of GFDP On-grade driveways, trails, sidewalks, boardwalks, roads and road maintenance; storm drainage system construction, repairs and maintenance
36. Individual Floodplain Development Permit (IFDP) – FLOOD FRINGE REVIEWS For any development inside the Community Floodplain that does not qualify for GFDP. Requires IFDP application, Check Sheet, grading and erosion control plans and payment of review fee.
37. Individual Floodplain Development Permit (IFDP) – FLOODWAY REVIEWS Includes all requirements for floodplain development and A flood study (No-Rise Certificate) that shows impact of proposed development on 100 year water surface elevation.
38. FDP Application Form
39. Number of IFDPs Approved YEAR      FDPs ISSUED2006               1112007                702008                202009                142010                232011                132012                14

40. A Few Floodplain Development Scenarios

    Floodplain vs. Floodway Development
41. Scenario # 1 New Single Family Residence in Floodplain FEMA Floodplain Stream Centerline Community Floodway FEMA Floodway Floodplain Development Permit Required Proposed Single Family Residence Community Special Flood Hazard Area
42. Scenario # 2 New Single Family Home in Community Encroachment Area FEMA Floodplain Community Floodway Stream Centerline FEMA Floodway Area Proposed Single Family Home Community Special Flood Hazard Area
43. Scenario # 2 Single Family Home in the Community Encroachment Area FEMA Floodplain Community Floodway Stream Centerline Requirements Floodplain Development Permit Flood Study (<0.1’ Rise) FEMA Floodway Area Proposed Single Family Home Community Special Flood Hazard Area
44. Scenario # 3 Single Family Home in the FEMA Floodway FEMA Floodplain Community Floodway Stream Centerline FEMA Floodway Proposed Single Family Home Community Special Flood Hazard Area
45. Scenario # 3 Single Family Home in the FEMA Floodway FEMA Floodplain Community Floodway Stream Centerline Requirements Floodplain Development Permit Flood Study (0.00’ Rise) FEMA Floodway Proposed Single Family Home Community Special Flood Hazard Area

46. Violations

    Usually Involves Filling in Community Encroachment Area/FEMA Floodway Notice of Hearing – Corrective Actions 60 Days to Correct
47. David Love
48. Melonee Brock Tim Trautman

    Flood Mitigation Regulatory Staff

    Tim Ruane David Love Bill Tingle
49. QUESTIONS ??