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<br />The channel area ahould be seeded with a native graBS mixture and the <br />graaa should be mowed to a height of approximately 4 inches aeveral times each <br /> <br />(11) Station 21+95 t022+35-A48"x40' <;:ulvert (orequivatent) ahould <br />be inatalled at Poplar Street to convey Q25 . 90 cfs. <br /> <br />growlngseaaon. <br /> <br />(5) Sts.tion 13+10 to 13+S5-A 72" x 44".r<;:h <;:ulvert (or equivalent) <br />should be installed at Pine Street to <;:onvey Q25 . 135 cfs. <br /> <br />(12) Station 22+35 to 25+00 - A channel ahould be excavated with the <br />di=ensions recommended in Improvement (10). <br /> <br />..am~ <br /> <br />(I3l Station27+00to28+50-Tofurtherincreasethcaafetyofthe <br />cion dam, the spillway ahould be protected from erosion. A riprap lined <br />from the spillway crest to a point downstream from the toe of the dam is <br />mended. <br /> <br />de ten- <br /> <br />(6) Station 13+55 to 14+80 - A channel ahould be excavated with the <br />dimensions aa proposed in Improve~nt (4). <br /> <br />section <br /> <br />recom- <br /> <br />(7) Ststion 14+80 to 15+20 - Sediment accumulation ahould be clesned from <br />bene.th the bridge and a minimum clearance of 3 feet ahould be provided to <br />convey Q25 . 130 cfa. <br /> <br />(14) <br /> <br />Station41+30to41+70-Two48"x40'culverta <br /> <br />be installed st County Road 136 to <br />the road will need to be excavated <br /> <br />convey Q25 - <br />and regraded <br /> <br />175cfs. <br /> <br />(0< <br />". <br /> <br />equivalent) should <br />area south of <br /> <br />to obtain sufficient clearancc. <br /> <br />(8) Station 15+20 to 19+10 - A channel should be excavated with the aame <br />dimenaiona aa proposed in Improvement (4). <br /> <br />Pine Ridge Drainage <br /> <br />(9) Station 19+10 to 20+70 - A 72" x 44" x 160' arch culvert (or eql,livalent) <br />ahould bc installed at the Elm I Elbert Sreet intersection to cnvey Q25 . 130 ets. <br />The inlet will be located upatream ftom the alley between Puplar and Elm Streets. <br />This culvert will reducc flood damage potential to the residcncea at the inter- <br />section. Channel improvements on the Kennett Drainnge snd the Pine Ridge Drain- <br />age are necessary co convey all runoff to the new inlet location. <br /> <br />(15) Station 0+00 to 3+50 - A channel should he excavated leading to thc <br />inlet of the culvert which should be ins tel led for Improvement (9). The new <br />channel alignment will be located along the aouth aide of thc alley to prevent <br />flooding of residences at the Elm I Elbert Street interacction. The followin~ <br />channel size and propertiea are recommended: <br /> <br />Optionl,lOO-YearChannelDeaign <br /> <br />CapacitY-QIOO"226cfs <br />BottoOlWidth-7feet <br />Side Slopes - 4:1 (if possible) <br />hti.uted Depth - 2.3 feet <br /> <br />Optio" Z, 25-Ye~' C1.",u,,,l Design <br />with Drainage Easement <br />Capacity-Q25-90ds <br />Bottom Width - 4 feet <br />SideSlopes-4:l <br />Eatimated Depth - 2.0 feet <br /> <br />Capacity - QIOO - 115 cfa <br />Bottom Width - 5 feet <br />SideSlopes-4:lorflatter <br />Estimated Depth-1.9 feet <br /> <br />Option 2: 25-YcarChannelDesign <br />with Drainage Easement <br />Capacity - Q25 - 75 cfa <br />Bottom Width - 4 feet <br />SideSlopes-4:1 <br />Estimated D<!pth - 1.7 fect <br /> <br />(10) Station 20+70 to 21+95 - A channel should be excavated with the follow- <br />ing .i2e and properties: <br /> <br />Opti""l: lOC-YeatCI",""elDesig" <br /> <br />-61- <br /> <br />-62- <br />