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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br /> <br /> <br />111-6 <br /> <br />Figure IIl-4 <br /> <br />Bear Canyon Creek below <br />Gilpin, City of Boulder. <br />This was originally a slop- <br />ing drop, but the structure <br />has evolved into a vertical <br />drop, with riprap basin. <br /> <br />Figure 111-5 <br /> <br />Big Dry Creek at C-470, <br />rock size too small and <br />channel degrading. <br />