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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 />outlet works will have to be inspected periodically and silt removed as required. <br /> <br />Two sections of this reach require some modification, however. The area <br />at station 213 + 00 and the section from Pecos Street to 96th Avenue are the two <br />sections requiring modification. <br /> <br />At some time in the past, a dam was constructed across the Niver Creek <br />main channel at approximately station 213 + 00 and the creek diverted into a by- <br />pass channel. The bypass channel has become the moin creek channel over the <br />years; however, for flows considerab Iy less than the 10-year flood flow, the water <br />will overtop the dam and both channels would function. The bypass channel is very <br />unsightly at present and has almost vertical side slopes in areas. These slopes are <br />susceptible to undercutting and sliding. It is recommended that the creek be re- <br />turned to its historic channel by constructi ng an interconnected series of gabion <br />drop structures at the location of the old dam. This structure will produce a cas- <br />cade which could become the focal point of a greenbelt in the future. <br /> <br />The section of channel between Pecos Street and 96th Avenue is quite <br />steep and contai ns a number of existi ng gab ion drop structures. The prab lem in <br />this section is that 96th Avenue parallels the creek on the north and the road <br />embankment is very steep. This road was completed in early 1974 and the embank- <br />ment slope has not grown over with vegetation to date. Vegetatian will never <br />cover the slope sufficiently to provide complete erosion control due to the fact <br />that maintenance of a grass cover is impossible. It is recommended that the <br />channel along 96th Avenue in this reach be protected with riprap. <br /> <br />Huran Street Crossing <br /> <br />The existing Huron Street culvert is adequate to pass the 10-year flood <br />flows; however, the 100-year flood wi II overtop the roadway. The consequences <br />of this overtopping are minor; therefore, the only recommended modification is <br />to provide riprap protection on the downstream side of the bridge. <br /> <br />111-11 <br />