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North Carolina CTS Committee Meeting #9

North Carolina CTS Committee Meeting #9. June 19, 2001. Introduction and Welcome. Status Updates:. Scoping/Basin Plans. Phase I Scoping Schedule. Proposed Phase II Scoping Plan. Scoping in 5 central river basins planned to start October 1, 2001:

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North Carolina CTS Committee Meeting #9

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  1. North Carolina CTS Committee Meeting #9 June 19, 2001

  2. Introduction and Welcome

  3. Status Updates: Scoping/Basin Plans

  4. Phase I Scoping Schedule

  5. Proposed Phase II Scoping Plan • Scoping in 5 central river basins planned to start October 1, 2001: • First emphasis on Chowan, Roanoke, and Yadkin River Basins • 36 counties • 3 scoping teams • Catawba and New River Basins to follow • 15 counties • scoping teams tbd

  6. Status Updates: Flood Data andMapping Development

  7. G&O Status

  8. Watershed Concepts Status • White Oak Basin • Tar Pamlico Basin

  9. White Oak River Basin • Terrain: 100% Complete • Survey: 100% Complete • Hydrology: 50% Complete • Hydraulics: 33% Complete • Floodplain Mapping: 25% Complete • Sample DFIRMs presented at ASFPM

  10. White Oak River Basin

  11. Onslow County – Preliminary DFIRMs

  12. Tar-Pamlico River Basin • Field Survey: • Structure Surveys: 100% Complete • Cross Section Surveys: 50% Complete • High Water Mark Surveys: 15% Complete • H&H: • Hydrology: 10% Complete

  13. Revised Schedule • White Oak River Basin • DFIRM: August 30, 2001

  14. Status Updates: LIDAR Surveys andDEM Development

  15. Watershed Concepts — LIDARPre-Processing Status 6/08/01

  16. Watershed Concepts — Vegetation Removal Status 6/08/01

  17. G&O — Automated LIDAR Processing Status 6/08/01

  18. G&O — Bare Earth DEM Generation Status 6/08/01

  19. G&O — TIN GenerationStatus 6/08/01

  20. Status Updates: LIDAR Quality Control Surveys

  21. Quality Control Surveys

  22. Status Updates: DFIRM Specifications

  23. DFIRM Graphic Specifications • State has received FEMA’s comments on latest prototype • New prototype that incorporates final comments will be generated for inclusion in DFIRM Delivery Order

  24. DFIRM Database Specifications • Draft DFIRM database tables conceptualized for inventory, base mapping, and DFIRM mapping • Engineering judgement tables under discussion • Additional table definitions and documentation needed

  25. Status Updates: Program Funding/Partnering

  26. Information Technology Requirements Analysis, Preliminary System Design, Work Plan, and Delivery Order

  27. Higher Standards Draft Document

  28. Policy & Procedures Manual

  29. Purpose of the Manual • Consolidate information about the NC Flood Mapping Program in one location • Inform new staff about the program • Serve as a resource for future CTS projects

  30. Contents of the Manual • Two major units • Policies • Procedures • Appendices to include Mapping Activity Statements, a template for the basin plans, and templates for the Delivery Orders

  31. Policies Unit • Explanation of the process for raising and resolving programmatic issues and for establishing new policies • Flowchart depiction of the process • Policy establishment

  32. Procedures for Mapping Unit • Overview of the flood mapping process for North Carolina • Sections to describe the mapping components: • Scoping • Leveraging Existing Geospatial Data Resources • Production • Topographic Data Development • Flood Data Development • DFIRM Production • Quality Control Reviews

  33. Procedures for Mapping Unit(continued) • Post-Preliminary Processing • Data Dissemination and Archiving • Map Maintenance • Education/Outreach • Contracting Approach • Higher Standards • Flood Warning System • Post-Flood Verification • Partnerships • Funding

  34. Procedures for Mapping Unit(continued) • Where applicable, each of the sections will have two subsections for (1) Procedures and (2) Standards and Specifications

  35. Partnering/MOA

  36. Community Partnering • Cooperating Technical Partner MOA • GIS Data Sharing MOA

  37. Issue Discussion: Surface Water Mapping for DFIRMs

  38. Purpose • This issue paper is a discussion of the mapping and handling of surface water features and names as part of the DFIRM production for North Carolina.

  39. Background • The mapping of surface waters is desired to be comprehensive, accurate, and complementary of the other data layers that are part of the FMP and the Corporate Geographic Database.

  40. Existing Data Resources • Statewide 24k by River Basin • Statewide NHD24k by Cataloging Unit • FMP Breaklines 12k • Locally derived surface • The US Geographic Names Information System (GNIS) • Existing FIRMs and FIS contain surface water feature names

  41. Breaklines • It contains single, double, and centerlines for units 1 square mile and larger. • It does NOT contain all of the same linework as USGS Topo. • It is more accurate (1:12,000 and 1:4,800). • It is hydrologically corrected (dendritic network, flowing downhill). • It is topologically corrected (no dangles, except at network inputs and outfalls).

  42. Issue Discussion: Panel Numbering

  43. DFIRM Map Numbering System MM X SS LLLL PP SS = State FIPs code (37) MM = EN 1,000,000-ft coordinates LLLL = LRMP map numbers to include EN 100,000-ft coordinates and the EN 10,000-ft coordinates PP = place holders for additional EN 1,000-ft coordinates (00 for panels printed at 1"=500') X = panel suffix (“A” for initial edition)

  44. DFIRM Map Numbering System (Continued) • New DFIRM panels in North Carolina could either be compiled at 1”=1,000’, covering an area of 20,000 ft x 20,000 ft (20” x 20” maps); or the DFIRM panels could be compiled at 1”=500’, covering an area of 10,000 ft x 10,000 ft (20” x 20” maps).  • An additional 2-digits (both zeros) are held in reserve as a “place holder” in the event that future DFIRM panels may be printed at a larger scale, e.g., 1” = 250’, covering an area of 5,000 ft x 5,000 ft for which the 1,000 ft coordinates would either be 0” or 5."

  45. Issue Discussion: Potential Delegation of LOMCs

  46. Potential Delegation of LOMCs • On Friday June 15, 2001, the following individuals from NC visited D&D for a LOMC Introduction / Workshop • Gary Thompson (NCGS) • Kurt Sumner (Executive Director ACSM, National) • Tom Morgan (NCSS Representative on CTS) • Johnie Garrason (NCSS Member and Board Examiner for NC Engineers and Surveyors) • Richard Bennett (NCSS President) • Benji Brown (NCSS Member and City of Wilmington Representative) • Matt Miller (FEMA HQ) Teleconferenced in for a portion of the afternoon discussion

  47. Potential Delegation of LOMCs • The following topics were covered during the LOMC Introduction/Workshop • General LOMC Requirements • New LOMR-F Rule • Processing Cases with Special Considerations • Call Center Support • LOMA 2000 • Processing Workshop • Other Related Processing Issues • Where do we go from here?

  48. Action Items/Wrap Up

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