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• <br />The Whitewater Course design incorporates three "U" drop structures made to <br />accommodate a variety of different in-stream users. These features provide a better boating <br />experience at the higher flow rates and therefore draw more boaters at those rates. Obviously, <br />very high flood flows are not considered as normal boating flows, but the course was designed to <br />withstand the impact of high flood flows. Each "U" drop is followed by a self-scouring pool. <br />These structures are designed to divert and control the flow at specific points to create surf <br />waves, rodeo holes, standing waves, eddies, and jets of water for squirt boating. As water flows <br />increase, these wave forms become larger, more powerful, and conducive to the sport of <br />whitewater rodeo, play-boating, and slalom racing. The structures included in the Whitewater <br />Park are massive structures built of large stone, grouted together with concrete, spanning the <br />entire channel and are anchored well into the bed and banks of the river. They are designed to <br />divert and control water to create whitewater boating features, particularly at high flows. These <br />structures function even if they are partially inundated, and work together in tandem to create the <br />desired features. (See Figure l.) <br />Ll <br />?? • i ?.,.;? <br />? y I ? • • ? . 4 ? _. ? y <br />?- <br />? <br />Figure 1. T'he U-structure is created from rock and grout laid in the riverbed for flow control and <br />the creation of a recreational boating feature. (Yampa River in Steamboat Springs.) <br />A plan view illustration of the U-structure is shown in Figure 2. This feature is used to <br />create a river wide "drop" and can be used to constrict lower flows to increase the velocity and <br />power of the water. By adjusting the gradient of the flow over the U-drop a wave or hydraulic <br />can be formed. The structure also features elevated wings that are positioned along both <br />• <br />-5-