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Home My WebLink About20180486.tiffFederal Emergency Management Agency Washington, D.C. 20472 February 8, 2018 CERTIFIED MAIL RETURN RECEIPT REQUESTED The Honorable Steve Moreno Chairman, Weld County Board of Commissioners P. O. Box 758 Greeley, CO 80632 Dear Mr. Moreno: IN REPLY REFER TO: Case No.: 17-08-0838R Community Name: Weld County, CO Community No.: 080266 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 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 Denver, at (303) 235-4830, or the FEMA Map Information eXchange (FMIX) toll free at 1-877-336-2627 (1-877-FEMA MAP). Additional information about the NFIP is available on our website at Mips: iiwww. fema.gov/national-flood-insurance-program. Sincerely, Patrick "Rick" F. Sacbibit, P.E., Branch Chief Engineering Services Branch Federal Insurance and Mitigation Administration List of Enclosures: Conditional Letter of Map Revision Comment Document cc: The Honorable John Morris Mayor, City of Evans Mr. Tom Parko, Jr., M.A. Director of Planning Services Weld County Mr. Fred Starr Public Works Director City of Evans Mr. Joshua M. Hollon, P.E., CFM Senior Engineer HDR, Inc. corr►«.--anS oa. -a-I-/8' RECEIVED FEB 13 2018 WELD COUNTY COMMISSIONERS Ms. Jaclyn Michaelsen, P.E., CFM Ditesco, LLC C c : ()Ern CRis)/CA CFH) PLAN c mt rp) , pw(Tm) 2018-0486 Page 1 of 6 Issue Date: February 8, 2018 Case No.: 17-08-0838R CLOMR-APP ceAR om Federal Emergency Washington, Management Agency D.C. 20472 D s`� CONDITIONAL LETTER OF MAP REVISION COMMENT DOCUMENT COMMUNITY INFORMATION PROPOSED PROJECT DESCRIPTION BASIS OF CONDITIONAL REQUEST COMMUNITY Weld County (Unincorporated Areas) orate Colorado FILL HYDRAULIC ANALYSIS FLOODWAY UPDATED TOPOGRAPHIC DATA COMMUNITY NO.: 080266 IDENTIFIER Riverside Park Redevelopment APPROXIMATE LATITUDE AND LONGITUDE: 40.371, -104.681 SOURCE: USGS QUADRANGLE DATUM: NAD 83 AFFECTED MAP PANELS TYPE: FIRM* NO.: 08123C1543E DATE: January 20, 2016 TYPE: FIRM NO.: 08123C1727E DATE: January 20, 2016 TYPE: FIRM NO.: 08123C1731E DATE: January 20, 2016 * FIRM - Flood Insurance Rate Map FLOODING SOURCE AND REACH DESCRIPTION South Platte River — from approximately 1,070 feet upstream of 37th Street to approximately 1,400 feet downstream of U.S. Highway 85 PROPOSED PROJECT DESCRIPTION Flooding Source Proposed Project Location of Proposed Project South Platte River Fill Placement along the left overbank from approximately 2,060 feet upstream of 37th Street to approximately 3,930 feet downstream of U.S. Highway 85 SUMMARY OF IMPACTS TO FLOOD HAZARD DATA Flooding Source Effective Flooding Proposed Flooding Increases Decreases South Platte River Zone AE Zone AE Yes Yes BFEs* BFEs None Yes Zone X (shaded) Zone X (shaded) Yes Yes * BFEs - Base (1 -percent -annual -chance) Flood Elevations COMMENT This document provides the Federal Emergency Management Agency's (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 Map Information 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/national-flood-insurance-program. -(1,:i 414 Patrick "Rick' F. Sacbibit, P.E., Branch Chief Engineering Services Branch Federal Insurance and Mitigation Administration 17-08-0838R 104 Page 2 of 6 Ilssue Date: February 8, 2018 ICase No.: 17-08-0838R I CLOMR-APP Federal Emergency Management Agency <t..'' �� Washington, D.C. 20472 D sc` CONDITIONAL LETTER OF MAP REVISION COMMENT DOCUMENT (CONTINUED) OTHER COMMUNITIES AFFECTED BY THIS CONDITIONAL REQUEST CID Number: 080182 Name: City of Evans, CO AFFECTED MAP PANELS TYPE: FIRM NO.: 08123C1543E DATE: January 20, 2016 TYPE: FIRM NO.: 08123C1727E DATE: January 20, 2016 TYPE: FIRM NO.: 08123C1731E DATE: January 20, 2016 This comment is based on the flood data presently available. If you have any questions about this document, please contact the FEMA Map Information 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/national-flood-insurance-program. l :/41 Patrick "Rick" F. Sacbibit, P.E., Branch Chief Engineering Services Branch Federal Insurance and Mitigation Administration 17-08-0838R 104 ' Page 3 of 6 Ilssue Date: February 8, 2018 'Case No.: 17-08-0838R I CLOMR-APP A 7,+s�� Federal Emergency Management Agency Washington, D.C. 20472 °4 4 � 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 (refereed to as the proposed conditions model) to the hydraulic modeling used to prepare the Flood Insurance Study (FIS) (refereed 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: South Platte River BFE Change (feet) Location of maximum change Existing vs. Effective Maximum increase 0.1 approximately 1,400 feet downstream of U.S. Highway 85 Maximum decrease 0.8 approximately 3,360 feet downstream of U.S. Highway 85 Proposed vs. Existing Maximum increase None N/A Maximum decrease 0.4 approximately 1,400 feet downstream of U.S. Highway 85 Proposed vs. Effective Maximum increase None N/A Maximum decrease 0.8 approximately 3,360 feet downstream of U.S. Highway 85 This comment is based on the flood data presently available. If you have any questions about this document, please contact the FEMA Map Information 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/national-flood-insurance-program. --,2."li41f Patrick "Rick" F. Sacbibit, P.E., Branch Chief Engineering Services Branch Federal Insurance and Mitigation Administration 17-08-0838R 104 Page 4 of 6 'Issue Date: February 8, 2018 (Case No.: 17-08-0838R l CLOMR-APP A . 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 https://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. • An annotated copy of the FIRM, at the scale of the effective FIRM, that shows the revised base and 0.2 -percent -annual -chance floodplain 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 -built plans, certified by a registered Professional Engineer, of all proposed project elements. • Documentation of the individual legal notices sent to property owners who will be affected by any widening or shifting of the base floodplain along South Platte River. This comment is based on the flood data presently available. If you have any questions about this document, please contact the FEMA Map Information 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/national-flood-insurance-program. "1411 Patrick "Rick" F. Sacbibit, P.E., Branch Chief Engineering Services Branch Federal Insurance and Mitigation Administration 17-08-0838R 104 Page 5 of tissue Date: February 8, 2018 'Case No.: 17-08-0838R I CLOMR-APP Agency Federal Emergency Management 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 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 Map Information 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/national-flood-insurance-program. '44fri Patrick "Rich" F. Sacbibit, P.E., Branch Chief Engineering Services Branch Federal Insurance and Mitigation Administration 17-08-0838R 104 Page 6 of 6 Ilssue Date: February 8, 2018 (Case No.: 17-08-0838R I CLOMR-APP GSA. Federal Emergency Management oy Washington, D.C. 20472 Agency 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. Jeanine P. Petterson Director, Mitigation Division Federal Emergency Management Agency, Region VIII Denver Federal Center, Building 710 P.O. Box 25267 Denver, CO 80225-0267 (303) 235-4830 This comment is based on the flood data presently available. If you have any questions about this document, please contact the FEMA Map Information 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/national-flood-insurance-program. Patrick "Rick" F. Sacbibit, P.E., Branch Chief Engineering Services Branch Federal Insurance and Mitigation Administration 17-08-0838R 104 Hello