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<br />.' <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />, <br /> <br /> <br />Federal Emergency Management Agency <br />Washington, D.C. 20472 <br /> <br />CERTIFIED MAIL <br />RETURN RECEIPT REQUESTED <br /> <br />IN REPLY REFER TO: <br />Case No.: OI-08-220P <br /> <br />The Honorable Wellington E. Webb <br />Mayor, City and County of Denver <br />City and County Building <br />1437 Bannock Street, Suite 350 <br />Denver, CO 80202 <br /> <br />Community: City and County of Denver, CO <br />Community No.: 080046 <br />Panel Affected: 0008 C <br />Effective Date of J U L 0 5 2001 <br />This Revision: <br /> <br />102-I-C <br /> <br />Dear Mayor Webb: <br /> <br />This responds to a request that the Federal Emergency Management Agency (FEMA) revise the effective <br />Flood Insurance Rate Map (FIRM) for your community in accordance with Part 65 of the National Flood <br />Insurance Program (NFIP) regulations. In a letter dated April 24, 2001, Mr. Dick Leopoldus, President, <br />Oakwood Development, requested that FEMA revise the FIRM to show the effects of more detailed <br />topographic information and several projects along First Creek from 48th A venue to Himalaya Road and <br />along Tributary T (formerly First Creek Tributary) from Piccadilly Road to the confluence with First <br />Creek. <br /> <br />This revision incorporated channelization along First Creek from 48th A venue to approximately <br />1,600 feet upstream of the confluence with Tributary T and installation of a triple 8-foot by 2-foot <br />reinforced-concrete box culvert (RCB) 1,500 feet downstream of 48th Avenue; two golf-cart bridges, <br />both with an approximate span of200 feet, approximately 3,050 feet downstream and approximately <br />3,860 feet downstream of 48th Avenue; and twin 15-foot-4-inch by 10-foot-4-inch corrugated-steel <br />arch-pipe culverts under Himalaya Road, approximately 3,800 feet downstream of the confluence with <br />Tributary T. This revision also incorporated channelization along Tributary T from approximately <br />5,000 feet downstream to approximately 1,900 feet downstream of Piccadilly Road and installation ofa <br />double 6-foot by 2-foot RCB approximately 2,590 feet downstream of Piccadilly Road and a triple <br />IS-foot by 6-foot RCB approximately 4,700 feet downstream of Piccadilly Road. Fill was placed along <br />both banks of both First Creek and Tributary T throughout the entire project. The site is located in a <br />Special Flood Hazard Area (SFHA), an area that would be inundated by the flood having a I-percent <br />chance of being equaled or exceeded in any given year (base flood), designated on the effective FIRM as <br />Zone A, an SFHA with no Base Flood Elevations determined. This request follows up on a Conditional <br />Letter of Map Revision issued on December 22, 1999. <br /> <br />All data required to complete our review of this request were submitted with letters from Mr. Charles A. <br />McKnight, P.E., Vice President, Sellards & Grigg, Inc., and Mr. Leopoldus. <br /> <br />We have completed our review of the submitted data and the flood da1a shown on 1he effective FIRM. <br />We have revised the FIRM to modify the floodplain boundary delineations of the base flood along First <br />Creek from 48th Avenue to Himalaya Road and along Tributary T from Piccadilly Road to the <br />confluence with First Creek. As a result of the modifications, the widths of the SFHAs for both First <br />Creek and Tributary T increased in some areas and decreased in other areas. All increases in SFHA are <br />contained within the requestor's property. The modifications are shown on the enclosed annotated copy <br />