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<br />. <br /> <br />coefficient. <br />rainfall. and <br />in acres. <br /> <br />I is the average intensity of <br />A is the contributing basin area <br /> <br />27. "Storm or floodwater runoff channel" means a <br />floodpla in. <br /> <br />28. "Significant change" means a change in a <br />water surface profile of 0.5 feet or more for <br />a continuous distance of at least 500 feet. a <br />change of floodplain boundary effecting 5 or <br />more acres. a change in flood velocity of 2.0 <br />feet per second or more at any cross- section. <br />or a potential for damage to property greater <br />than $500 due to a change in water surface <br />elevations or velocities. <br /> <br />29. <br /> <br />"Water surface profileD <br />shows the relationship <br />elevation of the top of <br />the streambed with the <br />along the stream channel. <br /> <br />means a graph which <br />between the vertical <br />flowing water and of <br />horizontal distance <br /> <br />. <br /> <br />30. "Work map" means the document used during <br />the hydraulic analysis which typically shows a <br />greater level of detail or information than <br />the published or final flooded area map. <br /> <br />B. Terms Defined bv Statutes. Any term used in <br />these Floodplain Designation and Approval Rules <br />that is not defined herein but is defined in <br />Sections 37-60-101. 37-87-102. or 24-65.1-103, <br />C.R.S., is used with the meaning given therein. <br /> <br />. <br /> <br />-7- <br />