FLOOD08469 - Laserfiche WebLink

Home Browse Search

r YI-5 I r I I I r I ( I I 9. Reestablishing dparian vegetation in combination with, and with- out rock bank channel stabilization, is important. The enhance- ment of wildlife habitat shall be included. Wildlife habitat advantages to the community as a whole will be considered. REACH 1 - CHATFIELD TO COLUMBINE 10. The short-tel"m and long-term water quality and aquatic hdbitat irnpactsof the recommended plan <\re to be presefJted. The recommended alternati~e includes maintaining the existing channel alignment with riprap erosion protection in the vicinity of the gravel lakes. In other areas erosion protection would be provided by planting willows and other natural vegetation. The natural vegetation will enhance the recreation alternative which is to develop a regional park reserve. The regional park re~erve would pre~erve the natural river corridor by offering an undisturbed area for wildlife habitat and passive recreation u~e~. 11. All new or reconstructed bridges should be bui1twlth at least 2 feet of freeboard above the lOrJ-year water surface to reduce the probability of clogging by floatable debris. REACH 2 - COLUMBINE TO OXFORO The Corp5 of Engineers channel Improvement project includes a realignment of the e~istln9 channel, replacement of the UnIon Avenue drop structure and the Brown Ditch diversion at Co1l11T1bine Val1ey, and creatlng achanne 1 cap- able Of containing the lOQ-yearflood. F1oodplainlTIanagementwil1 prevent unwise development until the Corps project is completed. 12. Random, uncoordinated filling of the Channel withrubblf', trash materials or earth must be stopped immediately and enforced by the local governments. All channel bank modHicat10ns by individuah along the river should comply with the recorrrnended alignment, channel profile and cross ~ect ion reCorm1ended in this Phase B Ma~ter Pl an. REACH 3 . OXfORD TO BATES In thi~ reach the engineering alternative i> to maintain the natural chan- nel while providing erosion protf!dion at thf! outside of bends and where high velocities occur. Erosion protection would be provided by riprap and natural _egetat1on. floodp1ainmanagementwi11 reduce the likelihood that unwise development will result in increased future f1ooddamages. PhaseBP1an The pre 11m inar y eng ineering desi gn for ~he South Pl atte River i,; presented be 1 ow. The Q~erall recCKllllended rndS ter dra i naqeway plan for the South Platte River alSO inClude, a recreation plan wI1ich is presented inVo1(flle II. The recomrnended plJn was developed from the PhJse A report reccrnmf'nd a- tions based on cost effectivenf'ss, public input, meeting flood control needs, '11eeting regional recreation needs, public health and safety con- cerns, as well as the goals of the Urban OraiMge!< flood Control District and sponsors. The adopted plan and c1esigns are described in detail o~ the 45 drawings ~PP€nded to the repOrt. The drawings are full 22"x34" si ze at a scale of 1 inch to 200 feet and are avail Able for pr i nt i ng ~t the Di strict offi ces in ~n~er. Ple~se note th~t for each draOling there i~ <l narrative description given on the bac~ of tlJe preceding Mdwing. The general plan i~ describf'd following. REACH4.BATESTOCOLfAX The 1 imited structurdl improvements in this redch include ero~ion protec. tion u,i~g natural vegetation and riprap. Bridge impro_!!ments at the Evans Avenue bridge include the addition of a new bay on the left bank. Down~ stream of the Evans Avenue bridge, the floridaAvenuedamwouldber €'Illoved and the channel bottom allowed to de<rade. I~ediately downstream of the Evans Avenue bridge the chan~el 1'1; 11 b," widened a, OIell dS de",p",n",d. The f10rida Avenue dam, which is used todiv€rt irrigiltionwaterfortheOver- land Park Golf Course would be replaced by a new diversion upstream or by a wcllfle1dinthesamevicinity.