The URL can be used to link to this page

Browse Search

Home My WebLink About20231289.tiffFederal Emergency Management Agency CERTIFIED MAIL RETURN RECEIPT REQUESTED Mike Freeman Chair, Weld County Board of Commissioners 1150 O Street Greeley, CO 80631 Dear Mike Freeman: Washington, D.C. 20472 April 26, 2023 IN REPLY REFER TO: Case No.: 22-08-0777R Community Name: Weld County, CO Community No.: 080266 104 RECEIVED MAY 0 4 2023 WELD COUNTY COMMISSIONERS 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 (FIS) 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 Denver, at (303) 235-4830, or the FEMA Mapping and Insurance eXchange (FMIX) toll free at 1-877-336-2627 (1-877-FEMA MAP). Additional information about the NFIP is available on our website at https://www.fema.gov/flood-insurance. 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: The Honorable Gary Lebsack Mayor, Town of Johnstown Tom Parko Jr. Director of Planning Weld County Diana Aungst, CFM, AICP Planner II Mary Wohnrade, P.E. Wohnrade Civil Engineers, Inc Kevin Houck, P.E., CFM Chief, Watershed and Flood Protection Section Colorado Water Conservation Board Terri Fead, P.E., CFM Floodplain Mapping Coordinator Colorado Water Conservation Board Marta Blanco Castano, GISP, CFM Flood Mapping Program Assistant Colorado Water Conservation Board common's Co',i— ors O5 /10/23 CC'.0 M(RQ),pi..(m t. /DIAr PW(CH/ER/DD) 05 /AV/23 2023-1289 Page 1 of 6 Ilssue Date: April 26, 2023 (Case No.: 22-08-0777R I CLOMR-APP Federal Emergency Management Agency Washington, D.C. 20472 CONDITIONAL LETTER OF MAP REVISION COMMENT DOCUMENT COMMUNITY INFORMATION PROPOSED PROJECT DESCRIPTION BASIS OF CONDITIONAL REQUEST COMMUNITY Weld County Colorado (Unincorporated Areas) FILL EXCAVATION GRADING BRIDGE FLOODWAY 1D HYDRAULIC ANALYSIS UPDATED TOPOGRAPHIC DATA COMMUNITY NO.: 080266 IDENTIFIER Riverbend Estates P.U.D. APPROXIMATE LATITUDE 8 LONGITUDE: 40.317, SOURCE: USGS QUADRANGLE DATUM: NAD -104.910 83 AFFECTED MAP PANELS TYPE: FIRM' NO.: 08123C1683E DATE: January 20, 2016 TYPE: FIRM NO.: 08123C1684E DATE: January 20, 2016 " FIRM - Flood Insurance Rate Map FLOODING SOURCE AND REACH DESCRIPTION Little Thompson River - from just upstream of County Road 17 to approximately 1,200 feet downstream of County Road 15 PROPOSED PROJECT DESCRIPTION Flooding Source Proposed Project Location of Proposed Project Little Thompson River Fill Placement, Excavation, and Grading From just upstream of County Road 17 to approximately 3,070 feet downstream of County Road 15 New Pedestrian Bridge At approximately 1,200 feet upstream of County Road 17 SUMMARY OF IMPACTS TO FLOOD HAZARD DATA Flooding Source Effective Flooding Proposed Flooding Increases Decreases Little Thompson River No Floodway Floodway Yes None Zone A Zone AE Yes Yes No BFEs' BFEs Yes None Zone X (unshaded) Zone X (shaded) Yes None BFEs - Base (1 -percent -annual -chance) Flood Elevations COMMENT This document provides the Federal Emergency Management Agency's (FEMA's) comment regarding a request fora 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) 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. .(;/1 .44/ Patrick "Rick" F. Sacbibit, P.E., Branch Chief Engineering Services Branch Federal Insurance and Mitigation Administration 22-06-0777R 104 Page 2 of 6 I Issue Date: April 26, 2023 (Case No.: 22-08-0777R I CLOMR-APP pATt7Aj 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: 080250 Name: Town of Johnstown, Colorado AFFECTED MAP PANELS TYPE: FIRM NO.: 08069C1410G DATE: January 15, 2021 TYPE: FIRM NO.: 08069C1420G DATE: January 15, 2021 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.feme.govtflood-insurance. -A Patrick "Rick" F. Sacbibit, P.E., Branch Chief Engineering Services Branch Federal Insurance and Mitigation Administration 22-08-0777R 104 Page 3 of 6 (Issue Date: April 26, 2023 Na.:(Case 22-08-0777R I CLOMR-APP a _ O Federal Emergency Management Agency Washington, D.C. 20472 {gNAS 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 reflecting the existing conditions. The table below shows the changes in the base flood water -surface elevations (WSELs). Base Flood WSEL Comparison Table Flooding Source: Little Thompson River Base Flood WSEL Change (feet) Location of maximum change Proposed vs. Maximum increase None Not Applicable Existing Maximum decrease None Not Applicable 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/flaod-insurance. C:;/—,./4/ Patrick "Rick" F. Sacbibit, P.E., Branch Chief Engineering Services Branch Federal Insurance and Mitigation Administration 22-08-0777R 104 Page 4 of 6 Ilssue Date: April 26, 2023 (Case No.: 22-08-0777R I CLOMR-APP QE4p� RRT, Federal Emergency Management Agency ° Washington, D.C. 20472 Fl9ND SAS 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 maybe accessed at https://www.fema.gov/flood-maps/change-your-flood-zone/paper-application-forms/mt-2. • The detailed application and certification forms listed below maybe required if as -built conditions differ from the proposed plans. If required, please submit new forms, which maybe 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. 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, 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, 0.2 -percent -annual -chance floodplain and floodway boundary delineations shown on the submitted work map and how they tie-in to the base, 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. • 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 and any BFE establishment along the Little Thompson River. 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. (/' -41 Patrick "Rick" F. Sacbibit, P.E., Branch Chief Engineering Services Branch Federal Insurance and Mitigation Administration 22-08-0777R 104 Page 5 of 6 'Issue Data: April 26, 2023 (Case No.: 22-08-0777R 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 fmal modifications to published flood information and maps maybe accessed at hltps://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: Colorado Water Conservation Board 1313 Sherman Street, Room 718 Denver, CO 80203 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. 41----,2-4/ Patrick "Rick" F. Sacbibit, P.E., Branch Chief Engineering Services Branch Federal Insurance and Mitigation Administration 22-08-0777R 104 Page 6 of 6 'Issue Date: April 26, 2023 Na.:(Case 22-08-0777R I CLOMR-APP Federal Emergency Management Agency 4r, e a a3 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: 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 A preliminary study is being conducted for Weld County. Preliminary copies of the revised FIRM and FIS report were submitted to your community for review on March 23, 2022, and may become effective before the revision request following this CLOMR is submitted. Please ensure that the data submitted for the revision ties into the data effective at the time of the submittal. 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. .(f.1 .41 Patrick "Rick" F. Sacbibit, P.E., Branch Chief Engineering Services Branch Federal Insurance and Mitigation Administration 22.08-0777R 104 Hello