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Home My WebLink About20201735 Ver 2_21-04-1636R_104_City_20220303 Page 1 of 7 CLOMR-APP Issue Date: February 16, 2022Case No.: 21-04-1636R Federal Emergency Management Agency Washington, D.C. 20472 CONDITIONAL LETTER OF MAP REVISION COMMENT DOCUMENT COMMUNITY INFORMATIONPROPOSED PROJECT DESCRIPTIONBASIS OF CONDITIONAL REQUEST DAMBASE MAP CHANGES City of Boiling Spring Lakes 1D HYDRAULIC ANALYSIS Brunswick County FLOODWAY North Carolina COMMUNITY UPDATED TOPOGRAPHIC DATA COMMUNITY NO.: 370453 APPROXIMATE LATITUDE & LONGITUDE: 34.046, -78.037 IDENTIFIER Construction/Reconstruction SOURCE: Other (ArcGIS) DATUM: NAD 83 AFFECTED MAP PANELS TYPE: FIRM*DATE: 6/2/2006 NO.: 3720207900J TYPE: FIRMDATE: 6/2/2006 NO.: 3720208900J * FIRM - Flood Insurance Rate Map TYPE: FIRMDATE: 8/28/2018 NO.: 3720218000K TYPE: FIRMDATE: 8/28/2018 NO.: 3720218100K TYPE: FIRMDATE: 8/28/2018 NO.: 3720219000K TYPE: FIRMDATE: 8/28/2018 NO.: 3720219100K FLOODING SOURCE(S) AND REACH DESCRIPTION See Page 2 for Additional Flooding Sources Allen Creek - From the confluence of Liliput Creek to a point approximately 1.45 miles upstream of George II Highway SE. PROPOSED PROJECT DESCRIPTION Flooding SourceProposed ProjectLocation of Proposed Project Series of dams to be constucted on Allen Creek, Clear Pond, and Pine Allen CreekDam Repair Lake in the City of Boiling Spring Lakes. SUMMARY OF IMPACTS TO FLOOD HAZARD DATA Flooding SourceEffective FloodingProposed FloodingIncreasesDecreases Allen CreekZone AEZone AEYesYes Zone X (shaded)Zone X (shaded)YesYes FloodwayFloodwayYesYes BFEs*BFEsYesYes * BFEs - Base (1-percent-annual-chance) Flood Elevations COMMENT 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) 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. Additional Information about the NFIP is available on the FEMA website at https://www.fema.gov/flood-insurance. Engineering Services Branch Federal Insurance and Mitigation Administration21-04-1636R 104 Page 2 of 7Issue Date: February 16, 2022Case No.: 21-04-1636R CLOMR-APP Federal Emergency Management Agency Washington, D.C. 20472 CONDITIONAL LETTER OF MAP REVISION COMMENT DOCUMENT (CONTINUED) COMMUNITY INFORMATION (CONTINUED) ADDITIONAL FLOODING SOURCES AFFECTED BY THIS CONDITIONAL REQUEST FLOODING SOURCES AND REACH DESCRIPTION Clear Pond - From the confluence with Allen Creek to a point approximately 0.5 miles upstream of E Boiling Spring Road. Pine Lake - From immediately upstream of E Boiling Spring Road to a point approximately 0.5 miles upstream of E Boiling Spring Road. PROPOSED PROJECT DESCRIPTION Flooding SourceProposed ProjectLocation of Proposed Project Series of dams to be constucted on Allen Creek, Clear Pond, and Pine Clear PondDam Repair Lake in the City of Boiling Spring Lakes. Pine Lake SUMMARY OF IMPACTS TO FLOOD HAZARD DATA Flooding SourceEffective FloodingProposed FloodingIncreasesDecreases Clear PondZone AEZone AEYesNone BFEs*BFEsNoneYes Pine Lake Zone AZone AYesYes * BFEs - Base (1-percent-annual-chance) Flood Elevations 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) 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. Additional Information about the NFIP is available on the FEMA website at https://www.fema.gov/flood-insurance. Engineering Services Branch Federal Insurance and Mitigation Administration 21-04-1636R 104 Page 3 of 7Issue Date: February 16, 2022Case No.: 21-04-1636RCLOMR-APP Federal Emergency Management Agency Washington, D.C. 20472 CONDITIONAL LETTER OF MAP REVISION COMMENT DOCUMENT (CONTINUED) OTHER COMMUNITIES AFFECTED BY THIS CONDITIONAL REQUEST CID Number: 370295Name: Brunswick County (Unincorporated Areas), NC AFFECTED MAP PANELS TYPE: FIRMDATE: 8/28/2018 NO.: 3720219000K TYPE: FIRMDATE: 8/28/2018 NO.: 3720219100K TYPE: FIRMDATE: 8/28/2018 NO.: 3720310100K TYPE: FIRMDATE: 8/28/2018 NO.: 3720310200K TYPE: FIRMDATE: 8/28/2018 NO.: 3720311100K TYPE: FIRMDATE: 8/28/2018 NO.: 3720311200K 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) 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. Additional Information about the NFIP is available on the FEMA website at https://www.fema.gov/flood-insurance. Engineering Services Branch Federal Insurance and Mitigation Administration 21-04-1636R 104 Page 4 of 7Issue Date: February 16, 2022Case No.: 21-04-1636R 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. The table below shows the changes in the BFEs: BFE Comparison Table Flooding Source: Allen CreekBFE Change (feet)Location of maximum change Existing vs. Maximum increase2.1Immediately upstream of Alton Lennon Drive Maximum decrease0.0None Effective Proposed vs. Maximum increase0.0None Maximum decrease2.9Immediately upstream of Alton Lennon Drive Existing Proposed vs. Maximum increase0.5Immediately downstream of Alton Lennon Drive Maximum decrease2.9Immediately upstream of Alton Lennon Drive Effective Flooding Source: Clear PondBFE Change (feet)Location of maximum change Existing vs. Maximum increase1.1Immediately upstream of E Boiling Spring Road Maximum decrease2.4Approximately 0.8 miles upstream of E Boiling Spring Road Effective Proposed vs. Maximum increase0.0None Maximum decrease3.0Immediately upstream of E Boiling Spring Road Existing Proposed vs. Maximum increase0.0None Maximum decrease2.4Approximately 0.8 miles upstream of E Boiling Spring Road Effective Flooding Source: Pine LakeBase Flood WSEL Location of maximum change Change (feet) Proposed vs. Maximum increase0.0None Existing Maximum decrease0.1Upstream of Pine Lake Dam Increases due to the proposed project that exceed those permitted under Paragraphs (c)(10) or (d)(3) of Section 60.3 of the NFIP regulations must adhere to Section 65.12 of the NFIP regulations. With this request, your community has complied with all requirements of Paragraph 65.12(a) of the NFIP regulations. Compliance with Paragraph 65.12(b) also is necessary before FEMA can issue a Letter of Map Revision when a community proposes to permit encroachments into the effective floodplain that will cause BFE increases in excess of those permitted under Paragraph 60.3(c)(10). NFIP regulations Subparagraph 60.3(b)(7) requires communities to ensure that the flood-carrying capacity within the altered or relocated portion of any 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. 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) 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. Additional Information about the NFIP is available on the FEMA website at https://www.fema.gov/flood-insurance. Engineering Services Branch Federal Insurance and Mitigation Administration 21-04-1636R 104 Page 5 of 7Issue Date: February 16, 2022Case No.: 21-04-1636R 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 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. 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/flood-maps/change-your-flood-zone/paper-application-forms/mt-2. required, please submit new forms, which may be accessed at https://www.fema.gov/flood-maps/change-your-flood-zone/paper- application-forms/mt-2, or annotated copies of the previously submitted forms showing the revised information. percent, 2-percent, and 0.2 percent annual chance floods, and the regulatory floodway, must be submitted with Form 2. 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 floodway boundary delineations shown on the submitted work maps and how they tie into 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. your community that it has notified all affected property owners and affected adjacent jurisdictions. floodplain and/or any BFE increases along Allen Creek, Clear Pond, and Pine Lake 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) 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. Additional Information about the NFIP is available on the FEMA website at https://www.fema.gov/flood-insurance. Engineering Services Branch Federal Insurance and Mitigation Administration 21-04-1636R 104 Page 6 of 7Issue Date: February 16, 2022Case No.: 21-04-1636R 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) written statement from the community Chief Executive Officer, an ordinance, or other legislation, must describe the nature of the maintenance activities, the frequency with which they will be performed, and the title of the local community official who will be responsible for ensuring that the maintenance activities are accomplished. maps may be accessed at https://www.fema.gov/flood-maps/change-your-flood-zone/status/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: North Carolina Emergency Management, Risk Management Attention: Scott Gentry, P.E., CFM 4218 Mail Service Center Raleigh, NC 27699-4218 or submit the LOMR using the Online LOMC portal at: https://hazards.fema.gov/femaportal/onlinelomc/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 (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://www.fema.gov/flood-insurance. Engineering Services Branch Federal Insurance and Mitigation Administration 21-04-1636R 104 Page 7 of 7Issue Date: February 16, 2022Case No.: 21-04-1636R CLOMR-APP Federal Emergency Management Agency Washington, D.C. 20472 CONDITIONAL LETTER OF MAP REVISION COMMENT DOCUMENT (CONTINUED) 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. Jacky Bell Director, Mitigation Division Federal Emergency Management Agency, Region IV Rhodes Building, 3005 Chamblee Tucker Road Atlanta, GA 30341 (770) 220-5406 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) 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. Additional Information about the NFIP is available on the FEMA website at https://www.fema.gov/flood-insurance. Engineering Services Branch Federal Insurance and Mitigation Administration 21-04-1636R 104