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<br />f' <br /> <br />'I <br /> <br />e <br /> <br />EXHIBIT <br /> <br />j ~D '-, <br /> <br /> <br />1. PROJECT: Florence, Colorado <br /> <br />SECTION 205 PROJECT FACT SHEET <br />Date: December 4, 2002 <br />Division: South Pacific <br />District: Albuquerque <br /> <br />Congressional District - 5th District - Joel Hefley <br />U.S. Senate - Ben Nighthorse-Campbell <br />U.S. Senate - Wayne A. Allard <br /> <br />2. Authority: .section 205 of the 1948 Flood Control Act, as amended. <br /> <br />3. Location of Study Area: The study\u-ea is located in the city of Florence along Oak Creek, <br />within Fremont County, Colorado. Florence is located along the Arkansas River, approximately 30 <br />miles northwest of Pueblo, Colorado. <br /> <br />4. Problem: Runofffrom the areas west of Florence (upstream) combine and flow to the east along <br />Oak Creek through the city. Tbe 100-year event peak flow of 16,000 cfs cannot be contained by the <br />existing Oak Creek channel and will overtop its banks to flood the surrounding areas. <br /> <br />1999 aerial photography was used to develop the number of parcels subject to flooding along Oak <br />Creek. FEMA Flood Insurance Rate Maps (effective date unknown) were used to delineate the 100_ <br />and 500-year floodplains. There were approximately 408 structures within the 500-year floodplain <br />and 292 structures within the 100-year floodplain. Local real estate agents were consulted to <br />determine the value of damageable property, type of construction (single or multiple story, <br />basements) to detennine an average value and mix of improvements. No topography was available <br />to estimate structure elevations, so an average stage for each event was applied to a location within <br />"the floodplain where most structures were concentrated for each cross section used, and structures <br />were elevated 0.5' within that location. Estimated annual damage is approximately $1,100,000. <br /> <br />tit <br /> <br />5. Alternative Plans considered: Alter.native plans that were considered include the construction <br />of a detention pond on Oak Creek west df the Minnequa Canal. The detention pond will be capable <br />of providing protection against the 100-year event by delaying the peak flow. Costs are estimated as <br />follows: <br /> <br />Item <br />Mobilization <br />Clear and Grub <br />Dewatering <br />Embankment Construction <br />Sub-excavation <br />Borrow <br />_Chimney & Toe Drain <br />"pillway <br />Non-enclosed Rip-rap <br /> <br />Florence Oak Creek Reservoir <br /> <br />Unit <br />Each <br />Acre <br />Each <br />CY <br />CY <br />CY <br />LF <br />Each <br />CY <br /> <br />Estimate <br />1 <br />10 <br />1 <br />900,000 <br />100,000 <br />1,000,000 <br />1,600 <br />1 <br />60,000 <br /> <br />Unit Price <br />$60,000.00 <br />$1,145.00 <br />$25,000.00 <br />$1.75 <br />$4.60 <br />$1.75 <br />$114.50 <br />$90,000.00 <br />$28.00 <br /> <br />Amount <br />$60,000.00 <br />$11,450.00 <br />$25,000.00 <br />$1,575,000.00 <br />$460,000.00 <br />$1,750,000.00 <br />$183,200.00 <br />$90,000.00 <br />$1,680,000.00 <br />