Laserfiche WebLink
Baeser Bend -The 20' wide Baeser Bend notch has one inlet monitoring cross section set about 50' <br />back from the river. Also, one other cross section has been extended across the bottomland just <br />upstream of the levee cut. <br />Above Brennan -The Above Brennan site, which had an existing inlet that flooded at 13,000 cfs prior to <br />construction, now has an excavated outlet. An existing outlet was widened and cut down to correspond <br />to a flooding elevation of 13,000 cfs. One cross section has been set across the outlet to monitor any <br />future changes. In addition, three river cross sections have been extended across the bottomland. Only <br />one of these cross sections was surveyed in 1998. Due to large amounts of debris and vegetation, it was <br />not possible to survey the other two cross sections. <br />Johnson Bottom - A 200' wide levee breach was constructed at the lower end of Johnson-4 in 1998. <br />One monitoring cross section has been set across the length of that cut. Also, a bottomland monitoring <br />cross section was set from the downstream inlet monitoring benchmark across the bottomland to identify <br />deposition in the bottomland. Results of the 1998 post-runoff bottomland cross section survey were not <br />included in this report. The results were not accurate. <br />Leota Bottom -Two levee cuts were made along the Leota bottomland, referred to as L-7 (or the upper <br />cut) and L-7A (or lower spillway). The levee cuts were 350' and 600' in length for the L-7 and L-7A cuts, <br />respectively. One monitoring cross section was established across each cut. No bottomland monitoring <br />cross sections were set across the bottomland. The Leota bottomland is too expansive to monitor <br />appropriately. <br />Old Charlie Diked -The 100' wide Old Charlie Diked levee notch has one cross section across the <br />opening. There were no feasible locations to set any bottomland monitoring cross sections. Two years of <br />data are available for this opening. A natural levee breach, which occurred early in runoff season 1997, <br />has made the constructed levee opening kind of an outlet versus an inlet. It actually functions as both <br />depending on the flow magnitudes. The specific flooding discharge of the upper breach in not known. <br />i 2-2 <br />