Laserfiche WebLink
<br />I <br /> <br />I <br /> <br />I <br /> <br />Table 23. Aggradation-Degradation Potentials for Fossil Creek and <br />Tributaries (Developed Conditions). <br /> <br />I <br /> <br />I <br /> <br />Reach <br />Description <br /> <br />Equilibrium <br />Slope <br />(ft/ft) <br /> <br />Potential <br />Depth of <br />Aggradation1 <br />(ft) <br /> <br />Fossil Creek; <br /> <br />I <br /> <br />Reach 1 <br /> <br />I <br /> <br />Reach 2 <br /> <br />Reach 3 <br /> <br />I <br /> <br />Taft Hill Road to Shields Street <br /> <br />0.0125 <br /> <br />Stable <br /> <br />Shields Street to Burns Trib. <br /> <br />0.0074 <br /> <br />-3.0 <br /> <br />Burns Trib. to Fossil Ridge Dr. <br /> <br />0.0018 <br /> <br />-5.3 <br /> <br />Reach 4 <br /> <br />Note: The lower part of Reach 3 is a pond which will experience aggradation. <br /> <br />I <br /> <br />Reach 5 <br /> <br />I <br /> <br />Reach 6 <br /> <br />Reach 7 <br /> <br />I <br /> <br />Reach 8 <br /> <br />Fossil Ridge Dr. to Lang Gulch 0.0027 -2.3 <br />Lang Gulch to CS RR Crossing 0.0024 -1.1 <br />CS RR Crossing to Hwy. 287 0.0025 -9.2 <br />Hwy. 287 to Fossil Creek Drive 0.0004 -0.6 <br />Fossil Creek Drive to Section 181 0.0015 -5.7 <br /> <br />I <br /> <br />Note; Due to the effects of the culverts of County Roads 13 and 34, a long- <br />term equilibrium slope analysis becomes inapplicable downstream of <br />Section 181 on Fossil Creek. <br /> <br />I <br /> <br />Burns Tr ibutary: <br /> <br />0.0030 <br /> <br />-13.02 <br /> <br />Reach 1 <br /> <br />I <br /> <br />Reach 2 <br /> <br />I <br /> <br />Smith Creek: <br /> <br />I <br /> <br />Reach 1 <br /> <br />Reach 2 <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />Above Shields Street <br /> <br />Shields Street to Fossil Creek <br /> <br />0.0040 <br /> <br />-8.8 <br /> <br />Above Shields Street <br /> <br />0.0053 <br /> <br />-3.9 <br /> <br />Shields Street to Lang Gulch <br /> <br />0.0057 <br /> <br />-3.5 <br /> <br />48 <br /> <br />Table 23 (continued) <br /> <br /> Reach <br /> Description <br />Lanq Gulch: <br />Reach 1 Above Shields Street <br />Reach 2 Shields St. to CS RR Crossing #4 <br />Reach 3 CS RR #4 to CS RR Crossing #3 <br />Reach 4 CS RR #4 to County Road 34 <br /> <br />Equilibrium <br />Slope <br />(ft/ft) <br /> <br />Potential <br />Depth of <br />Aggradation1 <br />(ft) <br /> <br />0.0038 <br /> <br />-13.02 <br /> <br />0.0064 <br /> <br />-2.3 <br /> <br />0.0030 <br /> <br />-8.2 <br /> <br />See following note. <br /> <br />Note: Reach 4 is too short to adequately be described by an equilibrium <br />slope analysis. Major problems are local scour at culvert outlets. <br /> <br />Reach 5 County Rd. 34 to Smith Creek 0.0039 -6.4 deg <br />Reach 6 Smith Creek to CS RR Crossing #2 0.0029 -6.8 <br />Reach 7 CS RR Crossing #2 to Pond 0.0014 -2.5 <br />Reach 8 Pond to CS RR #1 0.0048 -11.6 <br />Note: The occurrence of geologic controls will limit degradation in reaches <br /> 7 and 8. <br /> <br />Reach 9 <br /> <br />CS RR Crossing # 1 to Fossil Creek <br /> <br />-2.9 <br /> <br />0.0028 <br /> <br />Stanton Creek: <br /> <br />Reach 1 <br /> <br />Fossil Creek to Just Below County <br />Road 32 <br /> <br />-13.02 <br /> <br />0.0027 <br /> <br />1 A negative sign indicates degradation. <br /> <br />2 Degradation will be limited to a maximum of approximately 13 feet due to the <br />sloughing and failure of banks. <br />