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Home My WebLink AboutFDP201900013 Letter of Map Revision 2020-03-18Federal Emergency Management Agency CERTIFIED MAIL RETURN RECEIPT REQUESTED Mr. Jeffrey B. Richardson Albemarle County Executive 401 McIntire Road Charlottesville, VA 22902 Dear Mr. Richardson: Washington, D.C. 20472 March 18, 2020 IN REPLY REFER TO: Case No.: 20-03-0027R Community Name: Albemarle County, VA Community No.: 510006 104 We are providing our comments with the enclosed Conditional Letter of Map Revision (CLOMR) on a proposed project within your community that, if constructed as proposed, could revise the effective Flood Insurance Study report and Flood Insurance Rate Map (FIRM) for your community. If you have any questions regarding the floodplain management regulations for your community, the National Flood Insurance Program (NFIP) in general, or technical questions regarding this CLOMR, please contact the Director, Mitigation Division of the Federal Emergency Management Agency (FEMA) Regional Office in Philadelphia, Pennsylvania, at (215) 931-5512, or the FEMA Mapping and Insurance eXchange (FMIX) toll free at 1-877-336-2627 (I-877-FEMA MAP). Additional information about the NFIP is available on our website at b.aps://www.feina.L,,ov/national-flood-insurance-program. Sincerely, Patrick "Rick" F. Sacbibit, P.E., Branch Chief Engineering Services Branch Federal Insurance and Mitigation Administration Enclosure: Conditional Letter of Map Revision Comment Document cc: Mr. Frank V. Pohl, P.E., CFM Albemarle County Engineer Mr. Brian Roy Manager Woolen Mills, LLC Ms. Sheila S. Reeves, P.E., CFM Senior Project Engineer Timmons Group, Inc. I Page 1 of 5 1Issue Date: March 18, 2020 ICase No.: 20-03-0027R I CLOMR-APP I Federal Emergency Management Agency Washington, D.C. 20472 CONDITIONAL LETTER OF MAP REVISION COMMENT DOCUMENT COMMUNITY INFORMATION PROPOSED PROJECT DESCRIPTION BASIS OF CONDITIONAL REQUEST Albemarle County BRIDGE FLOODWAY Virginia GRADING HYDRAULIC ANALYSIS (Unincorporated Areas) UPDATED TOPOGRAPHIC DATA COMMUNITY COMMUNITY NO.: 510006 Woolen Mills Redevelopment APPROXIMATE LATITUDE AND LONGITUDE: 38.018.-78.457 IDENTIFIER SOURCE: Precision Mapping Streets DATUM: NAD 83 AFFECTED MAP PANEL TYPE: FIRM' NO.: 51003CO289D DATE: February 4, 2005 ` FIRM - Flood Insurance Rate Map FLOODING SOURCE AND REACH DESCRIPTION Moores Creek — from approximately 670 feet upstream of Railroad to approximately 170 feet downstream of Sewage Road PROPOSED PROJECT DESCRIPTION Flooding Source Proposed Project Location of Proposed Project Moores Creek New Bridge Approximately 840 feet upstream of Railroad Grading On the left overbank from approximately 730 feet upstream of Railroad to approximately 910 feet upstream of Railroad SUMMARY OF IMPACTS TO FLOOD HAZARD DATA Flooding Source Effective Flooding Proposed Flooding Increases Decreases Moores Creek Floodway Floodway None Yes Zone AE Zone AE Yes Yes Zone X (shaded) Zone X (shaded) Yes Yes COMMENT This document provides the Federal Emergency Management Agencys (FEMA's) comment regarding a request for a CLOMR for the project described above. This document is not a final determination; it only provides our comment on the proposed project in relation to the flood hazard information shown on the effective National Flood Insurance Program (NFIP) map. We reviewed the submitted data and the data used to prepare the effective flood hazard information for your community and determined that the proposed project meets the minimum floodplain management criteria of the NFIP. Your community is responsible for approving all floodplain development and for ensuring that all permits required by Federal or State/Commonwealth law have been received. State/Commonwealth, county, and community officials, based on their knowledge of local conditions and in the interest of safety, may set higher standards for construction in the Special Flood Hazard Area (SFHA), the area subject to inundation by the base flood). If the State/Commonwealth, county, or community has adopted more restrictive or comprehensive floodplain management criteria, these criteria take precedence over the minimum NFIP criteria. This comment is based on the flood data presently available. If you have any questions about this document, please contact the FEMA Mapping and Insurance eXchange (FMIX) tall free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the LOMC Clearinghouse, 3601 Eisenhower Avenue, Suite 500, Alexandria, VA 22304-6426. Additional Information about the NFIP is available on the FEMA website at https:llwww.fema.gov/national-flood-insurance-program. Patrick'Rick" F. Sacbibit, P.E., Branch Chief Engineering Services Branch Federal Insurance and Mitigation Administration 20-03-0027R 104 ' Page 2 of 5 ,Issue Date: March 18, 2020 JCase No.: 20-03-0027R I CLOMR-APP Federal Emergency Management Agency Washington, D.C. 20472 CONDITIONAL LETTER OF MAP REVISION COMMENT DOCUMENT (CONTINUED) COMMUNITY INFORMATION To determine the changes in flood hazards that will be caused by the proposed project, we compared the hydraulic modeling reflecting the proposed project (referred to as the proposed conditions model) to the hydraulic modeling used to prepare the Flood Insurance Study (FIS) (referred to as the effective model). If the effective model does not provide enough detail to evaluate the effects of the proposed project, an existing conditions model must be developed to provide this detail. This existing conditions model is then compared to the effective model and the proposed conditions model to differentiate the increases or decreases in flood hazards caused by more detailed modeling from the increases or decreases in flood hazards that will be caused by the proposed project. For this case, the modeling shows that the proposed project will cause increases in water surface elevations when compared with the existing conditions model without considering backwater effects from Riverra River. However, since flooding for the area of Moores Creek affected by the proposed projec is controlled by backwater effects from Riverra River, there will be no change in the Base Flood Elevations for Moores Creek when comparing the proposed conditions model with the existing conditions model and effective model. NFIP regulations Subparagraph 60.3(b)(7) requires communities to ensure that the flood -carrying capacity within the altered or relocated portion of any watercourse is maintained. This provision is incorporated into your community's existing floodplain management ordinances; therefore, responsibility for maintenance of the altered or relocated watercourse, including any related appurtenances such as bridges, culverts, and other drainage structures, rests with your community. We may request that your community submit a description and schedule of maintenance activities necessary to ensure this requirement. comment is based on the flood data presently available. If you have any questions about this document, please contact the FEMA Mapping and Insurance eXchange K) toll free at 1-877-336-2827 (1-877-FEMA MAP) or by letter addressed to the LOMC Clearinghouse, 3601 Eisenhower Avenue, Suite 500, Alexandria, VA 22304-6426. Tonal Information about the NFIP is available on the FEEMMA websi�te at https://vwwv.feme.gov/national4lood-insurance-program. Patrick"Rick" F. Sacbibit, P.E., Branch Chief Engineering Services Branch Federal Insurance and Mitigation Administration 20-03-0027R Page 3 of 5 Ilssue Date: March 18, 2020 (Case No.: 20-03-0027R I CLOMR-APP . a �w Federal Emergency Management Agency Washington, D.C. 20472 CONDITIONAL LETTER OF MAP REVISION COMMENT DOCUMENT (CONTINUED) COMMUNITY INFORMATION (CONTINUED) DATA REQUIRED FOR FOLLOW-UP LOMR Upon completion of the project, your community must submit the data listed below and request that we make a final determination on revising the effective FIRM and FIS report. If the project is built as proposed and the data below are received, a revision to the FIRM and FIS report would be warranted. - Detailed application and certification forms must be used for requesting final revisions to the maps. Therefore, when the map revision request for the area covered by this letter is submitted, Form 1, entitled "Overview and Concurrence Form," must be included. A copy of this form may be accessed at https://www.fema.gov/media-library/assets/documents/1343. - The detailed application and certification forms listed below may be required if as -built conditions differ from the proposed plans. If required, please submit new forms, which may be accessed at hops://www.fema.gov/media-library/assets/documents/1343, or annotated copies of the previously submitted forms showing the revised information. Form 2, entitled "Riverine Hydrology and Hydraulics Form." Hydraulic analyses for as -built conditions of the base flood, the 10-percent, 2-percent, and 0.2-percent-annual-chance floods, and the regulatory floodway, must be submitted with Form 2. Form 3, entitled "Riverine Structures Form. - A certified topographic work map showing the revised and effective base and 0.2-percent-annual-chance floodplain and floodway boundaries. Please ensure that the revised information ties in with the current effective information at the downstream and upstream ends of the revised reach and any tributaries. - An annotated copy of the FIRM, at the scale of the effective FIRM, that shows the revised base and 0.2-percent-annual-chance floodpla and floodway boundary delineations shown on the submitted work map and how they tie-in to the base and 0.2-percent-annual-chance floodplain and floodway boundary delineations shown on the current effective FIRM at the downstream and upstream ends of the revised reach, as well as any tributaries. - As -built plans, certified by a registered Professional Engineer, of all proposed project elements. - A copy of the public notice distributed by your community stating its intent to revise the regulatory floodway, or a signed statement by your community that it has notified all affected property owners and affected adjacent jurisdictions. - Documentation of the individual legal notices sent to property owners who will be affected by any widening or shifting of the base floodplain along Moores Creek. his comment is based on the flood data presently available. If you have any questions about this document, please contact the FEMA Mapping and Insurance eXchange (FMIX) toll free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the LOMC Clearinghouse, 3601 Eisenhower Avenue, Suite 500, Alexandria, VA 22304-6426. Additional Information about the NFIP is available on the FEMA website at https!/lwww1fe�ma�.gow/national-flood-insurance-program. Patrick "Rick" F. Sacbibit, P.E., Branch Chief Engineering Services Branch Federal Insurance and Mitigation Administration 20-03-o027R 104 ' Page 4 of 5 1Issue Date: March 18, 2020 Case No.: 20-03-0027R I CLOMR-APP Federal Emergency Management Agency Washington, D.C. 20472 CONDITIONAL LETTER OF MAP REVISION COMMENT DOCUMENT (CONTINUED) COMMUNITY INFORMATION (CONTINUED) DATA REQUIRED FOR FOLLOW-UP LOMR (continued) - FEMA's fee schedule for reviewing and processing requests for conditional and final modifications to published flood information and maps may be accessed at https://www.fema.gov/forms-documents-and-software/flood-map-related-fees. The fee at the time of the map revision submittal must be received before we can begin processing the request. Payment of this fee can be made through a check or money order, made payable in U.S. funds to the National Flood Insurance Program, or by credit card (Visa or MasterCard only). Please either forward the payment, along with the revision application, to the following address: LOMC Clearinghouse Attention: LOMR Manager 3601 Eisenhower Avenue, Suite 500 Alexandria, Virginia 22304-6426 or submit the LOMR and fee using the Online LOMC portal at: https://hazards.fema.gov/femaportal/onlinclomc/signin After receiving appropriate documentation to show that the project has been completed, FEMA will initiate a revision to the FIRM and FIS report. Because the flood hazard information (i.e., base flood elevations, base flood depths, SFHAs, zone designations, and/or regulatory floodways) will change as a result of the project, a 90-day appeal period will be initiated for the revision, during which community officials and interested persons may appeal the revised flood hazard information based on scientific or technical data. This comment is based on the flood data presently available. If you have any questions about this document, please contact the FEMA Mapping and Insurance eXchange TMIX) toll free at 1-877336-2627 (1-877-FEMA MAP) or by letter addressed to the LOMC Clearinghouse, 3601 Eisenhower Avenue, Suite Soo, Alexandria, VA 22304-6426. dditional information about the NFIP is available on the FEMA website at https://www.fema.gov/national-flood-insurance-program. Patrick'Rick" F. Sacbibit, P.E., Branch Chief Engineering Services Branch Federal Insurance and Mitigation Administration 20-03-0027R 104 I Page 5 of 5 Ilssue Date: March 18, 2020 (Case No.: 20-03-0027R I CLOMR-APP P` Federal Emergency Management Agency ° Washington, D.C. 20472 ttrj) 0 CONDITIONAL LETTER OF MAP REVISION COMMENT DOCUMENT (CONTINUED) I COMMUNITY INFORMATION (CONTINUED) COMMUNITY REMINDERS We have designated a Consultation Coordination Officer (CCO) to assist your community. The CCO will be the primary liaison between your community and FEMA. For information regarding your CCO, please contact: Ms. Janice Barlow Director, Mitigation Division Federal Emergency Management Agency, Region III One Independence Mall, Sixth Floor 615 Chestnut Street Philadelphia, PA 191064404 (215) 931-5512 comment is based on the flood data presently available. If you have any questions about this document, please contact the FEMA Mapping and Insurance eXchange X) toll free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the LOMC Clearinghouse, 3601 Eisenhower Avenue, Suite 500, Alexandria, VA 22304-6426. lional Information about the NFIP is available on the FEMA website at https://www.fema.gov/national-flood-insurance-program. Patrick 'Rick' F. Sacbibit, P.E., Branch Chief Engineering Services Branch Federal Insurance and Mitigation Administration 20-03-0027R