FLOOD06640 - Laserfiche WebLink

Home Browse Search

~~nmade obstructions in the study area include most of the bridges over ~derson and King Arroyos and their approach embankments. Table 1 lists descriptive structural data of bridges in the study arca. TABLEl BRI!lGES ACf(QSS JIJU<1\NSAS RlVER AND TJUBUTARIES La Junta, Colorado and Vicinity Flood Damage Reduction Measures. Levees have been con- structed slong the Arkansas River by local interest but are substan- dard in design and material. These levees are generally ineffective in preventing large floods and in same instances such as during the June 1965 flood, damages might have been less without the existance of these levees. Stream/Location DESCRIPTIVE DATA sectiotl Number Type of Structure ArkanllsaRiver Main Street 130 (Co. St. IIwyl09) Proposed La Junta Local Protection Proiect. The proposed La Junts local protection project co~tises protective measures on 1U1derson and King Arroyos to cotltrol floodflows having II frequency of occurrence of once in 100 years. Improvements on Anderson Arroyo ccnsists of Channelizing 3,700 feet of the arroyo above the tieback levees extending upstream from the Arkansas River Channelization Project. The 70-foot wide channel would have a capacity of 11,000 cubic feet per second (cfs). Improvemetlt of King ArrOYO consists of 5,190 feet of arroyo channelization tied into the concrete-lined section of the Arkatlsas River Channelizatiotl Project and tieback levees. The King Arroyo channel, designed to carry 7,200 cfs, would have a base width of 80 feet. The selected plan of improvement for the Arkansas River provides for channelization from Pueblo to a point near Las Animas. It would consist of 76 miles of improved atld straightened channel, levees, bank protective stabilizatiotl work and, landside interior drainage ditches. Design flows are those diSCharges having a prob- able frequency of once in 100 years, except in the La Junta urban area where the degree of protection would be raised to accommodate Standard Project Flood discharge and at the mouths of tributaries where th~ ~apacity would he designed to suit etltrance conditions. KitlqArroyo AT&SF Railway U.s. Hwy 50 3rdStreet 6th Street 2030 2050 2080 2130 14th Street 2210 (Not treated as a Anuerson Arroyo Pringle Ave lIT&SPRailway U.S.l!wy50 " 3030 3050 3070 Concrete Oeck, Conctete Girders, Concrete Bents Wood Cross Ties, Steel Girders, CotlcreteBents Concrete Deck, Concrete Girders, Concrete Betlts Concrete Deck, Steel Girders, eotlcreteBents Concrete Deck, COtlcreteGirders 48"Corrugated Het.<\lPipe bridge due to restricteu Wood Deck, Steel Truss Concrete Deck, Steel Girders,Conorete Betlts Concrete Deck, concrete Girders, Concrete Bcnts " Maximum Width of Opening(s) feet 1,3.20 m '" '" " floware.a) " no m Number "' Spans " , , , , , , ,