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Home My WebLink AboutFDP202000037 Review Comments 2021-01-12NATIONAL FLOOD INSURANCE PROGRAM FEMA PRODUCTION AND TECHNICAL SERVICES CONTRACTOR Mr. Leonard Jackson, P.E. Project Manager Leonard Jackson Associates, LLC. 26 Firements Memorial Drive Pomona, NY 10970 Dear Mr. Jackson: January 12, 2021 IN REPLY REFER TO: Case No.: 21-03-0174P Community: Albemarle County, VA Community No.: 510006 316-AD This responds to your request dated October 29, 2020 that the Department of Homeland Security's Federal Emergency Management Agency (FEMA) issue a revision to the Flood Insurance Rate Map (FIRM) for Albemarle County, Virginia and Incorporated Areas. Pertinent information about the request is listed below. Identifier: North Pointe Development — Flat Branch Flooding Source: Flat Branch FIRM Panel Affected: 51003CO145D The data required to complete our review, which must be submitted within 90 days of the date of this letter, are listed on the enclosed summary. If we do not receive the required data within 90 days, we will suspend our processing of your request. Any data submitted after 90 days will be treated as an original submittal and will be subject to all submittal/payment procedures, including the flat review and processing fee for requests of this type established by the current fee schedule. The current fee schedule is available for your information on the FEMA Web site at https://www.fema.gov/flood-map-related-fees. FEMA receives a very large volume of requests and cannot maintain inactive requests for an indefinite period of time. Therefore, we are unable to grant extensions for the submission of required data for revision requests. If a requester is informed by letter that additional data are required to complete our review of a request, the data must be submitted within 90 days of the date of the letter. Any fees already paid will be forfeited for any request for which the requested data are not received within 90 days. LOMC Clearinghouse, 3601 Eisenhower Avenue, Suite 500, Alexandria, VA 22304-6426 PH: 1-877-FEMA MAP STARR II, under contract with the FEDERAL EMERGENCY MANAGEMENT AGENCY, is a Production and Technical Services Contractor for the National Flood Insurance Program 2 If you have general questions about your request, FEMA policy, or the National Flood Insurance Program, please call the FEMA Mapping and Insurance Exchange (FMIX), toll free, at 1-877-FEMA MAP (1-877-336-2627). If you have specific questions concerning your request, please contact your case reviewer, Mr. Wael Eltayeb, by e-mail at wael.eltgyeb&stantec.com or by telephone at (301) 982-2806, or the Revisions Coordinator for your request, Ms. Sonal Kulkarni, at sonal.kulkami&stantec.com or at (240) 542-3102. Sincerely, P � - Alex Haptemariam, P.E., CFM MT-2 Process Manager STARR II cc: Mr. Julian Bivins Planning Commission Liaison Ms. Kimberly Biasiolli Natural Resources Manager Natural Resources & Land Conservation Ms. Wendy C. Howard -Cooper Virginia Department of Conservation & Recreation Division of Dam Safety and Floodplain Management 316-AD NATIONAL FLOOD INSURANCE PROGRAM FEMA PRODUCTION AND TECHNICAL SERVICES CONTRACTOR Case No.: 21-03-0174P Summary of Additional Data Required to Support a Letter of Map Revision (LOMR) Requester: Mr. Leonard Jackson, P.E. Community: Albemarle County, VA Community No.: 510006 The issues listed below must be addressed before we can continue the review of your request. 1. The submitted Form 1, entitled "Overview & Concurrence Form," did not include the community official's signature. Please resubmit Application/Certification Form 1, entitled "Overview & Concurrence Form," Section D (copy enclosed). 2. Paragraph 65.6(a)(2) of the National Flood Insurance Program (NFIP) regulations states that to avoid discontinuities between revised and unrevised flood data, hydraulic analyses must have a logical transition between revised elevations of the base (1-percent-annual-chance) flood and those developed previously for areas not affected by the revision. Our review revealed that the post -project conditions hydraulic analyses along Flat Branch do not tie into the effective hydraulic analysis within 0.5 foot at the upstream end of the revised reach. Please provide revised post project conditions analyses for Flat Branch that tie into the effective hydraulic analysis within 0.5 foot, or within 0.0 feet if practical. 3. The HEC-RAS output shows negative surcharge at Cross Section 4125 of -0.10, respectively. Please revise the floodway analysis to eliminate all negative surcharges or explain why this is not necessary. 4. The following comments are based on our review of the post -project condition hydraulic analysis and the submitted topographic work map. Please provide an explanation for these discrepancies or make the appropriate changes and submit a revised work map that is certified by a registered professional engineer. a. The stream baseline is disconnected on the submitted digital work map. Please submit a revised digital work map that clearly shows stream baseline for the entire revision area. b. The floodway width at the upstream end of the revised reach do not adequately tie into the effective floodway width. Please extend the submitted topographic work map to show the tie-ins between the effective and revised boundary delineations of the regulatory floodway. c. Please extend the submitted topographic work map to show the tie-ins between the effective and revised boundary delineations of the base floodplain and 0.2-percent-annual-chance floodplain. LOMC Clearinghouse, 3601 Eisenhower Avenue, Suite 500, Alexandria, VA 22304-6426 PH: 1-877-FEMA MAP STARR II, under contract with the FEDERAL EMERGENCY MANAGEMENT AGENCY, is a Production and Technical Services Contractor for the National Flood Insurance Program 2 5. Please submit annotated Flood Insurance Rate Map (FIRM), at the scale of the effective FIRM affected by your revision request that show the revised boundary delineations of the base floodplain, 0.2-percent-annual-chance floodplain, and regulatory floodway shown on the submitted work map and how they tie into the boundary delineations shown on the effective FIRM at the downstream and upstream ends of the revised reach. 6. Please submit documentation of the individual legal notices that were sent to property owners who are affected by any increases in width and/or shifting of the base floodplain and/or increase in Base Flood Elevations. Legal notice may take the form of certified mailing receipts or certification that all property owners have been notified, with an accompanying mailing list and a copy of letter sent. Examples of individual notices can be found on pages 12 through 17 of the instructions for the MT-2 application/certification forms, which may be accessed at http://www.fema.jzov/librgUL/viewRecord.do?id=1493. 7. Please submit a copy of the public notice distributed by Albemarle County stating its intent to revise the regulatory floodway, or provide a statement that community officials have notified all affected property owners, in compliance with Paragraph 65.7 (b)(1) of the National Flood Insurance Program regulations. These notices must include the extent of revision, the changes to the regulatory floodway, and contact information for any interested parties. An example of public notice can be found in Figure 3 of the MT-2 instructions, which may be accessed at htq2://www.fema.gov/librgry/viewRecord.do?id=1493. Please send the required data directly to us at the address shown at the bottom of the first page attention to Mr. Wael Eltayeb, STARR II. For identification purposes, please include the case number referenced above on all correspondence. 316-AD