FLOOD06000 - Laserfiche WebLink

Home Browse Search

East l04t.h Avenue The East 104th Avenue at Staticnj)3+90 at. present has no cul- vert at the point where the proposed First (~reek channel crosses the road\/ay. A new bridge has been provided uncler the roadway to pass the 100-~rear flow without overtopping. ThiC I,nclge ",ill have two spans of 36.0' each wit.h a height of 8.0'. Ripra~ rl~olection is provided on the bed to protect. the bridge foundations. !.,,-~~~state Hi~~ 76 The highway at Station l71+40 ba" five CMP's of varying sizes whictl have to be dismantled. To pass thE 1()O-year flow without over- topping the highway, a new box culvert bridge has been provided. This will consist of four barrels each 14.0' , ]0.0'. Suit.able upstream and down~;tream transitions have been provided al_ong with rip rap as shown in t.he drawing. The upstream bed in a length of l]O feet has been steepen- ed and provided with riprap. In te r ~ ta te Highway ~Lt-,)-.2'}l.Ei"-fl_~an~Ll. .)~ r.a~"J,Il.8.s~~.l7,I~~(I...h3 In this reach the First Creek has. wlcle flood pLain. The creek will be channelized to carry the 100-year fL()~ a. shown in the drawings. First Creek in this reach is crossed by Havana Street at Station 187+80, the Burlington Ditch at Station 203+40 and the O'Brian Canal at Station 216+40. New structures are needed at these locations. Havana St reet The Havana Street. crossiIlg h;lS no ogerlings under the roadway at pl"esent. It is propose(1 to provide a hri,dge at the crossing to pass lhe ],OO-year f'low without overtopping. ~rhp bridge will have two spans each of 35.0' with a depth of 8.5!. 'file roadway will not be raised. In order to keep the invert of t.he bridge at E.I. 5,086.0, the upstream bed of the channel will be st.eepened for a length DE ]]0 feet and provided with a 1.5' drop as shown in the drawing. for obtaining proper flow condi tions upstream and dOvlIlstream trans i ti ems ]];:tve been provided. II [-5