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. . . The current study incorporates the as-built physical improvements, within the project reach, associated with construction of a flood protection levee on the left bank of the Cache la Poudre River between Linden Street and Lincoln Avenue. 1.2 Previous Studies Since the effe.ctive FIS and Flood Insurance Rate Maps (FIRMs) for the COFC were published, two Letters of Map Revision (LOMRs) have been approved by FEMA on portions of the Cache la Poudre River through Fort Collins. The hydraulic analyses and documentation for both LOMRs were completed by Anderson Consulting Engineers, Inc. (ACE) in May 1999 [ACE 1999] and June 2001 [ACE 2001]. The LOMR studies were approved by FEMA in December 1999 and November 2001, respectively. Additionally, three Letter of Map Amendments (LOMAs) have been approved by FEMA with in the current study reach. Data supporting the January 2001 and August 2002 LOMAs was completed by JR Engine:ering, Inc. of Fort Collins, Colorado. Data supporting the October 2005 LOMA was submitted by Drexel- Barrel, Inc. of Boulder, Colorado. The 1999 LOMR documented hydraulic modeling, flood profiles, and floodplain mapping changes as a result of the Timberline Road and Bridge construction. Effective study limits for the 1999 LOMR extends from a point approximately 8,600 feet upstream of Horsetooth Road (Cross Section 201202) upstream to Lemay Avenue (Cross Section 221637). Letter of Map Change (LOMC) obtained from FEMA for the 1999 LOMR is provided in Appendix B.l.l. The 2001 LOMR documented hydraulic modeling, flood profiles, and floodplain mapping as a result of improvements made to a drop structure and boat chute locatt:d between U.S. Highway 287 Bridge and the B.N.R.R. Bridge. Effective study limits for the 2001 LOMR extend from the downstream side of the drop structure (Cross Section 230193) upstream to the upstream side of the Coy Ditch Diversion Dam (Cross Section 230472). The LOMC documentation from FEMA for the 2001 LOMR was incorporated into the 2005 Removal Action LOMR (see description below). The 2001 LOMA [FEMA Case No.: 01-08-153A] removed a portion of the property located at 301 East Lincoln Avenue from the 100-year floodplain associated with the Cache la Poudre River. A copy of the 2001 LOMA is presented in Appendix B.2.1. The 2002 LOMA [FEMA Case No.: 02-08-485A] removed a portion of the property located at 105 East Lincoln Avenue from the 100-year floodplain associated with the Cache la Poudre River. A copy of the 2002 LOMA is presented in Appendix B.2.2. The 2005 LOMA [FEMA Case No.: 05-08- 0658A] removed numerous lots in the Old Town North Subdivision from the 100-year floodplain associated with Dry Creek and the Cache la Poudre River Floodplains. A copy of the 2005 LOMA is presented in Appendix B.2.3. COFC2003-10 Oxbow FINAL LOMR.doc 1.4 ANdERSON CONsulTiNG EI'IGiNEERS, INC.