Floodplain Mapping, Immediate needs information

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4/13/2020

2004 HURRICANE SEASON RECOVERY TEAM

North Carolina Floodplain Mapping Program

1.

Contact Information – Program Director

Mr. John Dorman

4719 Mail Service Center

Raleigh, North Carolina 27699 – 4719

(tele) 919-715-8000 ext 261 (fax) 919-715-0408

(email) john.dorman@ncmail.net

2.

Contact for Questions, Answers and Information -

Mr. John Dorman

4719 Mail Service Center

Raleigh, North Carolina 27699 – 4719

(tele) 919-715-8000 ext 261 (fax) 919-715-0408

(email) john.dorman@ncmail.net

3.

Program Description -

The North Carolina Floodplain Mapping Program (NCFMP) mission is to develop, maintain and disseminate current, accurate, digital flood hazard maps and reports for all of North Carolina. The NCFMP is administratively located in the North Carolina

Division of Emergency Management (DEM), Department of Crime Control and

Public Safety (CCPS). NCFMP is primarily responsible for two programs associated with flood hazards - (1) the statewide development, maintenance, and dissemination of digital Flood Insurance Rate Maps (DFIRMs) and relevant information, and (2) the development, maintenance and dissemination of a statewide, real-time flood inundation mapping and alert network.

The NCFMP is responsible for the statewide development, management, maintenance and dissemination of digital FIRMs for North Carolina. The primary purpose of

FIRMs is to graphically depict the horizontal boundaries, and vertical depth (base flood elevations) for the flooding that will occur during a 1.0% and 0.2% (100-year and 500-year) annual chance flooding event. These maps and supporting data is used by lenders, planners, developers, state and local emergency managers, and FEMA to mitigate and insure against future losses due to flooding. These maps and relevant geospatial and digital data are generated in both a digital and hardcopy form. In meeting the “dissemination of the digital maps” requirement, NCFMP has built and maintains a statewide database of digital geographic information and flood hazard information, now known as the North Carolina Floodplain Mapping Information

System (NCFMIS), web accessible at www.ncfloodmaps.com

.

The NCFMP is also responsible for the statewide development, maintenance and dissemination of real-time, digital flood inundation and flood forecast (flood warning) maps, relevant geospatial data, and reports. The Flood Warning Program, and associated web application, is a joint partnership between the NCFMP, the National

Weather Service (NWS), and the U.S. Geological Survey (USGS) to provide dynamic, digital flood inundation and flood forecast maps based on real-time stream

4/13/2020

2004 HURRICANE SEASON RECOVERY TEAM

North Carolina Floodplain Mapping Program gage and rainfall data. These maps and supporting data are used by the N.C.

Department of Transportation, state and local emergency managers, law enforcement agencies, FEMA, and the U.S. Army Corp of Engineers (USACE) to reduce the loss of life and property during flooding event.

In carrying out its primary responsibilities, the NCFMP facilitates, manage, quality controls, and/or coordinates all multi-level government and private-sector activities, outputs (deliverables) and outcomes associates with ten (10) separate, but interdependent, program components. These include: (1) mapping inventory and engineering needs assessment, (2) digital base map acquisition, (3) topographic data acquisition, (4) hydrologic and hydraulic engineering and modeling, (5) DFIRM panel generation, (6) DFIRM database generation, (7) post-preliminary map review,

(8) community and map user outreach and education, (9) information technology infrastructure (24x7, dynamic, GIS-enabled, relational database and interactive web applications), and (10) overall operational management and support.

4.

Scheduled Meetings -

Once funding is identified / secured for Phase III (Western North Carolina) engineering and mapping, FMP will begin scheduling meetings with each county and municipality to conduct mapping engineering needs assessments (scoping). This process and subsequent meetings will result in the development of River Basin Plans defining: (1) streams to be studied, (2) study methodology for each stream, (3) availability of local GIS data, and (4) current county and municipal flood-prevention ordinances. It is anticipated that these meetings will be scheduled in early May 2005.

5.

Current Accomplishments (Since December 2004) -

Delivery Order / contract signed for the acquisition of new digital aerial images

(orthophotography) for seventeen counties in Phase II and Phase III. These counties include – Martin, Northampton, Warren, Granville, Anson, Stanly,

Montgomery, Ashe, Watauga, Avery, Mitchell, Yancey, McDowell, Madison,

Swain, Rutherford, and Cleveland. Anticipated progressive delivery in three phases – end of June 2005, end of August 2005, end of November 2005. It is anticipated that by April 1, 2005, imagery for nine (9) of the seventeen (17) counties will have been acquired.

Delivery Order / contract signed for the acquisition of new digital elevation data for all of Phase III (7,037 square miles). Deliverables include: (1) 20-foot digital elevation models, (2) 50-foot hydrologically correct digital elevation model, (3) bare earth elevation data and breaklines, and (4) all-return elevation data. This information will be held to a 25 cm vertical accuracy standard. The deliverables will support: (1) floodplain mapping, (2) flood inundation mapping, (3) streambed mapping, (4) landslide mapping, and (5) production of new digital orthophotography. It is anticipated that by April 1, 2005, approximately 20 percent of the square area will have been acquired.

4/13/2020

2004 HURRICANE SEASON RECOVERY TEAM

North Carolina Floodplain Mapping Program

6.

Funds Expended / Encumbered -

Contracts have been signed and funds have been encumbered for the collection of elevation data and digital orthophotography. Tasks associated with Phase III (Western

North Carolina) are being supported by state appropriations – Hurricane Recovery

Funds).

7.

Issues / Problems -

Funding for Phase II (Yadkin, Watauga, New, Chowan River Basins) and Phase III

(French Broad, Broad, Hiawassee, Little Tennessee, Savannah) engineering and mapping has not been identified.

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