Laserfiche WebLink
<br /> <br />B. St"dyRuchDescription <br /> <br /> <br />The study ?each of Coal Creek is approxi~ately 4.4 miles in length and <br />extends from the confluence with Boulder Creek to a point a~proximately 0.8 <br />miles south of the developed portion of the Town of Erie. Figure_l (page J), <br />more accurately defines the limits of the study reach. <br /> <br />I <br />! <br />! <br />, <br />I <br />I <br />I <br /> <br />The ~ain channel is typically narrow and deep with steep banks. Vegeta- <br />tion along the banks includes grass, bushes and occasional trees which severely <br />limit the flow capacity of the channel. The overbank or floodplain areas <br />adjacent to the channel are primarily Cultivated land with the exception of the <br />Town of Erie and a small residential aubdivision at the lower cnd of thc study <br />reach. Photographs of typical conditions along the study reach, taken October <br />1, 1979,are included on pages 16through 18. The photographs may be located <br />by referring to the references line stations On the FlOOded Area Plates I <br />through 4. <br /> <br />Reference Line <br />Station 44+00 <br /> <br />The cbaanel exhibita a severe meanderinp, pattern upstream from the Town <br />of Erie. The top width of the channel ran~"s horn 30 to 50 f"d. At the <br />Union Pacifi" railroad bridge crossin& a man~ade channel has been constructed <br />whiCh has a bottom width of 80 feet. The channel is trapc~oi~al and was <br />originally built to reduce the flood ha~ard adjacent to town. At the north <br />end of Erie near tbe projection of Cheesman Street, the channel transitions <br />back to its narrvw meandering configuration. <br /> <br />Looking south from the road in <br />~estview Estate~ subdivision. <br /> <br />Homes are at right with opeo <br />pastU?C to th~ ~ast. <br /> <br />Obstructions to flood flows within the study reach are nomerOus. Road <br />and railroad eDbankmen~" cause significant d~ing effects which alter the <br />natoral path of major floods. The effects of these obstructions are detailed <br />in the hydra~lic analysis .portion of this st"dy. <br /> <br />-- <br /> <br />t <br /> <br />-^.,~ <br />, <br /> <br />-15- <br /> <br /> <br />Reference Line <br />Station 0+00 <br /> <br />From COllnty Line Road looking <br />southwest aCroSs grass hay field <br />toward Coal Cr~ek ch~nnel. <br /> <br />R~ference Line <br />Scat ion 72+00 <br /> <br />From Cou~ty Li~e RQad looking <br />east at th~ Burlington NQrth~rn <br />Railroad bridge. <br /> <br />-16- <br />