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<br />ORt\f1 <br /> <br />Klack <br /> <br />The Klack drains the majority of the east side of Breckenridge <br />above Ridge street. The capacity of the system of channels and <br />conduits is adequate to convey a slightly less than the 100-year <br />flood for the existing conditions. Under a full development <br />scenario, without detention, the capacity would be more on the <br />order of a 50-year flood. Therefore, development of new areas in <br />the basin should utilize detention to prevent increased downstream <br />flooding. Additionally, some improvements to the Klack itself <br />could be constructed to reduce the discharges it must convey. An <br />excellent project for the drainage would be to construct several <br />detention pond which would serve as both flood control and water <br />quality control facilities. To be of most benefit, it would be <br />good to locate one pond in the upstream reach of the Klack in the <br />vicinity of the Carter Park and the Elementary School and one or <br />two more in the open channel area between Briar Rose Lane and <br />Wellington Avenue. <br /> <br />The other major problem in the basin is the uncontrolled runoff <br />from the upper drainage area that flows toward Highland Terrace <br />near Washington Avenue. In its current situation, this flow does <br />not have a well defined drainage route. The proposed Gold Flake <br />II Subdivision would remedy this problem by collecting the flow and <br />providing a defined drainageway. The 1989 street projects will <br />include an inlet system that will have the capacity to discharge <br />this flow from Washington Avenue into the Klack. The final <br />component required for handling this drainage would be a suitable <br />conveyance system to bring the flow down the steep section between <br />Gold Flake and Highland Terrace. <br /> <br />Jones Gulch <br /> <br />Much of Jones Gulch is now conveyed in storm drains. The capacity <br />of this system was checked, and it is sufficient to convey the 100- <br />year flood. The most significant drainage problem on Jones Gulch <br />is the diversion structure designed to bypass low flows into a <br />portion of the original Jones Gulch. This structure is in poor <br />shape, consequently, the flow split during a major flood is <br />uncertain. It is possible that a large portion of a flood would <br />take the low flow channel route. If this occurs, considerable <br />damage to the Village could result since the storm drain that <br />conveys the low flow channel beneath the village is not designed <br />to handle high flows. The diversion structure should be repaired <br />so that is insures the proper flow splits during a major storm. <br /> <br />Lomax Gulch <br /> <br />The main concern with Lomax Gulch is similar to those expressed for <br /> <br />44 <br />