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<br />b. ~on~Residential <br /> <br />Commercial B~sinesses <br /> <br />Flood velocities through the inhabited portion of the Town of Erie range <br />from 1.9 to 4.7 feet per second and average 3.2 feet per second. To account <br />for potential damage resulting from velocity forces, the average velocity <br />head, equal to 0.2 feet, was added to the 100-year flood depths calculated <br />for each str~cture or dwelling. The adjustment was also used for Reach 4. <br /> <br />Office Buildings <br />c. Transportation Systems <br />d. Publiclltilities <br /> <br /> ,. Agdcultuul <br />2. Indirect Damages <br /> ,. Debris Removal <br /> ,. Loss " Sales <br /> ,. Loss " Rents <br /> ,. Loss " '"" Revenue <br /> .. Interest " Disaster Loans <br /> r. Miscellaneous Losses <br /> <br />The adjusted flood depths were then grouped into 1 foot increments for <br />each type of snucture for eaae of handling subsequent calculations of dollar <br />damages and to balance any errors inherenr in the method of collecting the <br />data. The results of this analysis are summarized in Table-6. <br /> <br />C. Direct Damage Determinations <br /> <br />It is recognized that the magnitude of the physical damages inflicted <br />and the va~ied economic losses associated with a major flood at Erie preclude <br />exact documentation of estimates in all categorios of flood damage. However. <br />it is believed the methods used to compile and correlatc dwnages have aChieved <br />a reasonable estimate of the total flood damages. <br /> <br />Residential - Prior to making the inventory of the structures ~n the <br />floodplain, local real estate agencies were contactcd to determine a base <br />price for the existing properties. Eleven homes currently on the market <br />and located throughout the floodplainareawero used by the survey team <br />as indicators to estimate tho markot val~es of the structures. <br /> <br />B. Flood Depth Determinations <br /> <br />Potential flood damages for structures "ith~n the study readtes "ere <br />estimated using depth-damage curVeS for structures and Contents developed <br />by the Federal Insurance Administration in 1914. A CurVe W4S developed lur <br />each type of str~cture. Th. value of the contents relative to the value of <br />the structure was assumed to be a ratio of 0.4 in the analysis. In a recent <br />survey, this ratio was found to be typical for the Denver Hetropolitan area. <br />Residential damages are summarized in Table-7 <br /> <br />Water surface profiles prepared in the hydraulic analysis were used to <br />delineate the 10-and IOO-yearfloodplainboundariesontopog.aphicmapsata <br />sealcofl"_200'. For Reach 2, field investigations were conducted by th.. <br />Colorado Water Conservation Board staff to inventory all struCtures within <br />the limits of the IOO-year noodplain to determine the location, u <e,type <br />of construction. relative value, and the 100-year flood depth relationship <br />for each structure. For Reach 4. the Weld County engineering staff provided <br />similar information for the damage analysis. <br /> <br />The depth of flooding relationship fo, the structures, which c. equal <br />to the diff"rence bet'~een th.. first-floor elevation and the '~.1ter s"dace <br />devadon, was cornputed fnr the 10- ,>nd lOO-year Hoods tor each .uucture <br />in the floodplain. <br /> <br />Non-Residential - The total value of non-residential property in the <br />floodplain of Reach 2 was estimated based on an average value for each of <br />the 27 non-residential structure. of $60,000 and a ratio of the value of <br />the contents to the value of the structure of 0.56. The percent damages for <br />non-residential damagcs for the 10- and tOO-year floods ~ere aa.umed to be <br />the s~e as found for residential property (9.7% and 27.0~ of the value of <br />the property, respectively). <br /> <br />-61- <br /> <br />-60- <br />