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Home My WebLink About20260099 " h O M Federal Emergency Management Agency ff« 4 Washington, D.C. 20472 December 23, 2025 RECEIVED CERTIFIED MAIL IN REPLY REFER TO: JAN 13 2026 RETURN RECEIPT REQUESTED Case No.: 25-08-0056P WELD COUNTY Community Name: Weld County,CO COMMISSIONERS The Honorable Perry L.Buck Community No.: 080266 Chair,Weld County Board of Commissioners Effective Date of 1150 O Street This Revision: May 21, 2026 P. O.Box 758 Greely,CO 80632 Dear Perry Buck: The Flood Insurance Study(FIS)report and Flood Insurance Rate Map(FIRM)for your community have been revised by this Letter of Map Revision(LOMR).Please use the enclosed annotated map panels revised by this LOMR for floodplain management purposes and for all flood insurance policies and renewals issued in your community. Additional documents are enclosed that provide information regarding this LOMR.Please see the List of Enclosures below to determine which documents are included.Other enclosures specific to this request may be included as referenced in the Determination Document.If you have any questions regarding floodplain management regulations for your community or the National Flood Insurance Program(NFIP)in general,please contact the Consultation Coordination Officer for your community.If you have any technical questions regarding this LOMR,please contact the Director,Mitigation Division of the Department of Homeland Security's Federal Emergency Management Agency(FEMA)in Denver,Colorado,at(303)235-4814,or the FEMA Mapping and Insurance eXchange 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, David N.Bascom,Acting Director Engineering and Modeling Division National Flood Insurance Program I Resilience List of Enclosures: Letter of Map Revision Determination Document Annotated Flood Insurance Rate Map Annotated Flood Insurance Study Report cc: Dawn Anderson Caitlin McDaniel,P.E.,CFM Floodplain Administrator Floodplain Mapping Program Manager Weld County Colorado Water Conservation Board Michelle Iblings,P.E.,CFM Kevin Houck,P.E.,CFM Vice President Chief,Watershed and Flood Protection Section Drexel,Barrell&Company Colorado Water Conservation Board Marta Blanco Castano,GISP,CFM cc:PL(OE/MN/AAPDA) Flood Mapping Program Assistant OEM(RR), Pw(ci/KH/DO) 2026-0099 Colorado Water Conservation Board O 1/2o/26 CoMKv on 0l/26/26 Page 1 of 4 Issue Date: December 23,2025 Effective Date:May 21,2026 Case No.: 25-08-0056P LOMR-APP OiyAART,144, Federal Emergency Management Agency °U Washington, D.C. 20472 "AND St LETTER OF MAP REVISION DETERMINATION DOCUMENT COMMUNITY AND REVISION INFORMATION PROJECT DESCRIPTION BASIS OF REQUEST CULVERT 1 D HYDRAULIC ANALYSIS Weld County GRADING FLOODWAY Colorado UPDATED TOPOGRAPHIC DATA COMMUNITY (Unincorporated Areas) COMMUNITY NO.: 080266 IDENTIFIER Weld CR 66&CR 41 Intersection Improvements APPROXIMATE LATITUDE AND LONGITUDE: 40.465,-104.679 SOURCE: OTHER DATUM: NAVD88 ANNOTATED MAPPING ENCLOSURES ANNOTATED STUDY ENCLOSURES TYPE:FIRM* NO.:08123C1533F DATE:November 30,2023 DATE OF EFFECTIVE FLOOD INSURANCE STUDY:September 26,2024 TYPE:FIRM NO.:0812301535E DATE:January 20,2016 PROFILES:55P and 55P(a) FLOODWAY DATA TABLE:23 Enclosures reflect changes to flooding sources affected by this revision. *FIRM-Flood Insurance Rate Map FLOODING SOURCE AND REVISED REACH Eaton Draw-From approximately 2,180 feet downstream of Weld County Road 66 to approximately 2,730 feet upstream of Weld County Road 66. SUMMARY OF REVISIONS Flooding Source Effective Flooding Revised Flooding Increases Decreases Eaton Draw Floodway Floodway YES YES Zone AE Zone AE YES YES BFEs* BFEs YES YES Zone X(shaded) Zone X(shaded) YES YES *BFEs-Base(1-percent-annual-chance)Flood Elevations DETERMINATION This document provides the determination from the Department of Homeland Security's Federal Emergency Management Agency(FEMA) regarding a request for a Letter of Map Revision(LOMR)for the area described above. Using the information submitted,we have determined that a revision to the flood hazards depicted in the Flood Insurance Study(FIS)report and/or National Flood Insurance Program(NFIP)map is warranted. This document revises the effective NFIP map,as indicated in the attached documentation. Please use the enclosed annotated map panels revised by this LOMR for floodplain management purposes and for all flood insurance policies and renewals in your community. This determination is based on the flood data presently available.The enclosed documents provide additional information regarding this determination.If you have any questions about this document,please contact the FEMA Mapping and Insurance eXchange 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 our website at httbs://www.fema.qov/flood-insurance. David N.Bascom,Acting Director Engineering and Modeling Division National Flood Insurance Program I Resilience 25-08-0056P 102-I-A-C Page 2 of 4 Issue Date: December 23,2025 Effective Date:May 21,2026 Case No.: 25-08-0056P LOMR-APP Federal Emergency Management Agency ° Washington, D.C. 20472 t�--IND SEC4 LETTER OF MAP REVISION DETERMINATION DOCUMENT (CONTINUED) COMMUNITY INFORMATION APPLICABLE NFIP REGULATIONS/COMMUNITY OBLIGATION We have made this determination pursuant to Section 206 of the Flood Disaster Protection Act of 1973 (P.L.93-234)and in accordance with the National Flood Insurance Act of 1968,as amended(Title XIII of the Housing and Urban Development Act of 1968,P.L.90-448), 42 U.S.C.4001-4128,and 44 CFR Part 65. Pursuant to Section 1361 of the National Flood Insurance Act of 1968,as amended, communities participating in the NFIP are required to adopt and enforce floodplain management regulations that meet or exceed NFIP criteria. These criteria,including adoption of the FIS report and FIRM,and the modifications made by this LOMR,are the minimum requirements for continued NFIP participation and do not supersede more stringent State/Commonwealth or local requirements to which the regulations apply. 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. We provide the floodway designation to your community as a tool to regulate floodplain development.Therefore,the floodway revision we have described in this letter,while acceptable to us,must also be acceptable to your community and adopted by appropriate community action,as specified in Paragraph 60.3(d)of the NFIP regulations. COMMUNITY REMINDERS We based this determination on the 1-percent-annual-chance(base)flood discharges computed in the FIS for your community without considering subsequent changes in watershed characteristics that could increase flood discharges. Future development of projects upstream could cause increased flood discharges,which could cause increased flood hazards. A comprehensive restudy of your community's flood hazards would consider the cumulative effects of development on flood discharges subsequent to the publication of the FIS report for your community and could,therefore,establish greater flood hazards in this area. Your community must regulate all proposed floodplain development and ensure that permits required by Federal and/or State/Commonwealth law have been obtained. State/Commonwealth or community officials,based on knowledge of local conditions and in the interest of safety,may set higher standards for construction or may limit development in floodplain areas. If your State/Commonwealth or community has adopted more restrictive or comprehensive floodplain management criteria,those criteria take precedence over the minimum NFIP requirements. We will not print and distribute this LOMR to primary users,such as local insurance agents or mortgage lenders;instead,the community will serve as a repository for the new data. We encourage you to disseminate the information in this LOMR by preparing a news release for publication in your community's newspaper that describes the revision and explains how your community will provide the data and help interpret the NFIP maps. In that way,interested persons,such as property owners,insurance agents,and mortgage lenders,can benefit from the information. This determination is based on the flood data presently available.The enclosed documents provide additional information regarding this determination.If you have any questions about this document,please contact the FEMA Mapping and Insurance eXchange 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 our website at httos://www.fema.gov/flood-insurance. _� dv -- David N.Bascom,Acting Director Engineering and Modeling Division National Flood Insurance Program I Resilience 25-08-0056P 102-I-A-C Page 3 of 4 Issue Date: December 23,2025 Effective Date:May 21,2026 Case No.: 25-08-0056P LOMR-APP j 1- n Federal Emergency Management Agency U�u,` ,, Washington, D.C. 20472 LETTER OF MAP REVISION DETERMINATION DOCUMENT (CONTINUED) 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: Nicole Aimone Director,Mitigation Division Federal Emergency Management Agency,Region VIII Denver Federal Center,Building 710 P.O.Box 25267 Denver,CO 80225-0267 (303)235-4814 This determination is based on the flood data presently available.The enclosed documents provide additional information regarding this determination.If you have any questions about this document,please contact the FEMA Mapping and Insurance eXchange 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 our website at https://www.fema.uov/flood-insurance. David N.Bascom,Acting Director Engineering and Modeling Division National Flood Insurance Program I Resilience 25-08-0056P 102-I-A-C Page 4 of 4 Issue Date: December 23,2025 Effective Date:May 21,2026 Case No.: 25-08-0056P LOMR-APP O�YAT\14. Cit Federal Emergency Management Agency U4 I. Washington, D.C. 20472 LETTER OF MAP REVISION DETERMINATION DOCUMENT (CONTINUED) PUBLIC NOTIFICATION OF REVISION A notice of changes will be published in the Federal Register. This information also will be published in your local newspaper on or about the dates listed below,and through FEMA's Flood Hazard Mapping website at https://www.floodmaps.fema.gov/fhm/bfe_status/bfe_main.asp. LOCAL NEWSPAPER Name: Greely Tribune Dates: January 14,2026 and January 21,2026 Within 90 days of the second publication in the local newspaper, any interested party may request that we reconsider this determination. Any request for reconsideration must be based on scientific or technical data. Therefore,this letter will be effective only after the 90-day appeal period has elapsed and we have resolved any appeals that we receive during this appeal period. Until this LOMR is effective,the revised flood hazard determination presented in this LOMR may be changed. This determination is based on the flood data presently available.The enclosed documents provide additional information regarding this determination.If you have any questions about this document,please contact the FEMA Mapping and Insurance eXchange 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 our website at httns://www.fema.ciov/flood-insurance. David N.Bascom,Acting Director Engineering and Modeling Division National Flood Insurance Program I Resilience 25-08-0056P 102-I-A-C LOCATION FLOODWAY PA)ANNUAL CHANCE FLOOD WATER SURFACE ELEVATION (FEET NAVD88) CROSS WIDTH SECTION MEAN WITHOUT WITH SECTION DISTANCE' AREA VELOCITY REGULATORY INCREASE (FEET) (SQ. FEET) (FEET/SEC) FLOODWAY FLOODWAY A 685 306 566 2.5 4,649.1 4,649.1 4,649.4 0.3 B 942 167 269 5.2 4,649.4 4,649.4 4,649.8 0.4 C 2,440 611 322 4.1 4,652.4 4,652.4 4,652.4 0.0 D 3,474 83 350 11.4 4,668.2 4,668.2 4,668.2 0.0 E 4,564 133 567 7.0 4,675.5 4,675.5 4,675.6 0.1 F 5,408 141 872 4.6 4,680.9 4,680.9 4,681.2 0.3 G 6,499 180 1,345 3.0 4,689.0 4,689.0 4,689.0 0.0 H 7,488 169 584 6.8 4,690.6 4,690.6 4,691.0 0.4 I 8,315 196 700 5.7 4,694.5 4,694.5 4,695.0 0.5 J 8,917 140 371 10.7 4,699.5 4,699.5 4,699.5 0.0 K 9.432 419 1.710 2.3 4,702.9 4.702.9 4.703.1 0.2 L 10,260 262 554 7.2 4,705.0 4,705.0 4,705.3 0.3 M 10,752 499 891 4.5 4,706.7 4,706.7 4,707.1 0.4 REVISED N 11,252 247 758 5.3 4,708.7 4,708.7 4,708.7 0.0 DATA > 0 11,696 200 706 5.6 4,709.9 4,709.9 4,710.4 0.5 P 12,794 605 2,348 1.7 4,716.2 4,716.2 4,716.2 0.0 Q 13,761 260 805 5.0 4,716.7 4,716.7 4,716.8 0.1 R 14,319 272 877 4.6 4,718.1 4,718.1 4,718.5 0.4 S 15,597 270 944 4.3 4,721.7 4,721.7 4,722.1 0.4 T 16,479 253 905 4.4 4,724.4 4,724.4 4,724.9 0.5 U 17,310 292 1,032 3.9 4,726.5 4,726.5 4,726.9 0.4 ✓ 18,567 307 1,443 2.8 4,732.2 4,732.2 4,732.6 0.4 'Stream distance in feet above confluence with Cache La Poudre River REVISED TO REFLECT LOMR EFFECTIVE: May 21,2026 D FEDERAL EMERGENCY MANAGEMENT AGENCY FLOODWAY DATA w m WELD COUNTY, CO G' AND INCORPORATED AREAS FLOODING SOURCE: EATON DRAW 97 \ \ _ , , — \ \ \ , \ \ \ \ \\ r-r > \ \ e. \ ` \ \ \ \ \\ \\ \ \ \ 7> \ \ \ r L D. D 1\ \\ \\\ , l,. \ ) , I , \ 1 I , \ \ \ t -I=. 03 A .� - m o� m • 0 -1 v O • O -.... O COl 0 0 Cn O a) a) v v v v v CD CD a O 11) N o cm m C/i .. C.1 O 01 \ � t ,` ► m ,,\ m 0 71 m I D I I \\ _ I KIi - III I ► HI I ► 1 c e o C ► 0 o 0 o G7 Z ► D m ► D z z Z ► z z z z D > D c i \\ > ►= D_ c ► D ►ZmmC n ► m-00F00 \ 0 0a , CD O O -k — N) N) C(.) Cn O Cn O Cn O Cn O EMERGENCY MANAGEMENT AGENCY FLOOD PROFILES REVISED TO ELD COUNTY, CO REFLECT LOMR EFFECTIVE: May 21, 2021 INCORPORATED AREAS EATON DRAW 0 \ \ I I \ \ I \ \ \ 0 1 1 \ % \ \ \ 1 (;)- \ \\ \ \ 1 1 \\ \ LOCAL ACCESS ROAD 1 x 1 1 2J m 1 < 1 En 1 \ m 1 0 1 \ zi 1 m 1 0 1 © 1 1 11 \ \\ 1 1 1 \ \ 1 1 1 \ 1 \ Q1 4 1 1 \ 4 1 1, \ 1 1 1 I I I I I I I I I I u) NJo m 531 0 0 o v o r D 8' m Z Z z Z 0 Z C C Z m > > D C > 0 D > > > C) m m Z m m m m r- r 0 0 0 0 C -P -P -t -.I v v v -4 V -1 - N N W GJ .p 4 O U1 O U1 O U1 O C EMERGENCY MANAGEMENT AGENCY FLOOD PROFILES REVISED TO JELD COUNTY, CO REFLECT LOMR EFFECTIVE: May 21, 2G ID INCORPORATED AREAS EATON DRAW I NOTE: MAP AREA SHOWN ON THIS PANEL IS LOCATED WITHIN TOWNSHIP 6 NORTH, RANGE 65 WEST. Weld County Unincorporated Areas REVISED AREA 080266 3230000 FT JOINS PANEL 1535 ) I . 1-PERCENT-ANNUAL-CH *-E R FLOOD DISCHARGE CONTAINED IN STRUCTURE aCI ' \\N , 4716.2 t • Without Base Flood Elevation(BFE) Z,,,,a v.Ase �1 With BFE or Depth a,pe 4E,AO,,aM rE AIR r AE I SPECIAL FLOOD 4716.2 HAZARD AREAS Regulatory Roadway 0.2%Annual Chance Flood Hazard,Areas 1 i � r of l%annual chance flood with average r i depth less than one foot or with drainage d 10 areas of less than one square mile Profile BaSellne t Future Conditions i%Annual 1 f/11 ` Chance Flood Hazard , OTHER AREAS OF )' f p,yf�7 C/lry FLOOD HAZARD d '"` Area with Reduced Flood Risk due to Levee 111606 " 4715.9 A t ,. �`�" See Notes:,.a 8B• SCALE Imagery Source:NAIP 20,'. Map noie�ua,: jt a� Universal Trans erse MercatorNAD 1983 UTM Zone 13N Y V4 Western Hemisphere,Vertical Datum:NAVD 88 -' 1 Inch-500 feet 1:6,000 T � 0 250 500 1,000 4+709.9 w t Feet Meters I - ,0'7t• 0 62.5 125 250 ), /t : / o NATIONAL FLOOD INSURANCE PROGRAM e 1 Slit' `.RTE NAP -- c7 .,I C WELD COUNTY,COLORADO © 470;.i/ one Incorporated Areas © ii Profile v PANEL 1533 of 2250 LA1.! il Baseline ZONE C Panel Contains: -0 COMMUNITY NUMBER PANEL SUFFIX 0 4705.0 w ¢• GREE E,CI OF 080184 1533 F +716.7 ll w_ 0 WELD COUNTY 080266 1533 F :::rat ate D w'� LT- REVISED TO `+r REFLECT LOMR 4703.3 z EFFECTIVE: May 21,2026 VERSION NUMBER ZONE 2.6.4.6 MAP NUMBER AE �� t ,r' r`� I 08123C1533F �� MAP REVISED NOVEMBER 30,2023 1 \ La l Sand creek -""'- ttor� , .. "rawr . ' ' 1" ZONE LMr> , - i / f} A z LIMIT OF STIED' �r 6 i= 0_ �` AREA REVISED 16 f z —BY(L�OMR E —OTIVE: v i p 4732.2 "` cr J U LY 14, 2016 GI 4732.0 a tx, H.,�'i ` NOTE: MAP AREA SHOWN© THIS(PANEL - t ZONE �' ',`4, !- Y IS LOCATED WITHIN TOWNSHIPCYNORTH, AE i RANGE 65 WEST. r t ' 4481000m N r 473230 r'H ; �' € . 392 , .- ,,,-... , ....:,„. .-_.__. . 4 ,, 01, .rr**------:----: ---K-. ---=',:;-frr,i, ----— , Q + Weld County �' �[(1R 1 f , }i ,,,, t~+ Eaton Draw . I r El Unincorporated Areas f 4725.4 080266 �1 s a is I , ' Profile i 4 Baseline ©, REVISED 'fI 1, ` ' � 21 2 °`� I 14,'23.1 AREA 1 _ °x ,-Ti ) Culvert ( ' ,C. f r l Q i ZOMA',1 L ;Ili ' 4 fr 4721.7 i 4719'5 AE --,, - t ; : i.,'s - c - , sr., µ 1 :g: / ,` Without Base Flood Elevation(BFE) t ` mn�aeaes - With��' 1„:„.: . 11�� With BFE or Depth DE SPECIAL FLOOD '!' HAZARD AREAS Regulatory Floodway ' MIx 0.2%Annual Chance Flood Hazard,Areas f of 1%annual chance flood with average i depth less than one foot or with drainage 4480000mN ""'j-i Q 4716.7 i areas of less than one square mile •t Future Conditions 1/Annual ® ' I - Chance Flood Hazard t t ,, OTHERAREASOF tt FLOOD HAZARD — ','' Area with Reduced Flood Risk due to Levee r." I . See Notes.::.,.:, JOINS PANEL 1533 SCALE Imagery Source:NAIP 2023 A Map Praleptks: Universal Transverse MercatoeNAD 1983 UTM Zone 13N N Western Hemisphere Vertical Datum NAVD 68 i Inch-1,000 feet 112,000 0 500 1,000 2,000 Feet Meters THIS AREA SHOWN 0 ,25 250 500 NATIONAL FLOOD INSURANCE PROGRAM z AT A SCALE OF FLOOD ItvSDt,_ E itATE ,,l: Q e WELD COUNTY,COLORADO d i aaala�orpprareaamas CO z 1 " = 500' ON MAP2.3 PANEL 1535 DF 2250 ��j��j/� — C (SEE MAP INDEX FOR FIRM PANEL LAYOUT) �i� NUMBER 08123C1533 � C Panel Contains. COMMUNITY NUMBER PANEL SUFFIX 44 9000m t GREELEY,CITY OF 080184 1535 E Lu. 7 N C WELD COUNTY 080266 1535 E To REVISED TO o REFLECT LOMR z EFFECTIVE: May 21,2026 VERSION NUMBER 1.1.1.0 MAP NUMBER 08123C1535E EFFECTIVE DATE JANUARY 20,2016 Hello