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Investigation <br />Task Description Cross Ref. <br />Contract Services Non -Labor <br />Year 1 Year 2 Year 3 Year 4 Yrs 5 -13 Cost <br />A. <br />Initial, Small Pulse Flow Test <br />0 <br />1 <br />G.P.S. Survey along the North Platte and Platte River to establish <br />benchmark monuments for vertical and horizontal control. <br />0 <br />2 <br />Monitor river stage and discharge at every North Platte River <br />bridae from Kevstone. NE to North Platte, NE. <br />0 <br />3 <br />Monitor river stage and discharge at every Platte River bridge from <br />North Platte, NE to Chapman, NE. <br />0 <br />4 <br />Monitor North Platte River stage at all segments where potential <br />flooding is a concern from Keystone, NE to North Platte, NE. <br />0 <br />Monitor Platte River stage at all segments where potential flooding <br />is a concern from North Platte. NE to Chapman. NE. <br />0 <br />6 <br />Calculate the safe channel capacity for all reaches of the North <br />Platte and Platte Rivers. <br />0 <br />B. <br />Testina of On -site Restoration Treatments <br />0 <br />1 <br />Select 4 of the 6 sediment study reaches between the J -2 return <br />channel and Chapman. NE. <br />0 <br />2 <br />Measure the initial channel bed, sandbar, and island topography at <br />each study site and the bed - material grain size distribution. Also, <br />document age and species of vegetation on sandbars and islands. <br />Accomplished by tasks I.C.1 -6 and II.A.4 -9. <br />0 <br />3 <br />Develop a plan to clear and lower a total of 16 to 20 acres of river <br />islands within the 4 study reaches. Consider blocking secondary <br />channels with river sand. <br />0 <br />4 <br />Obtain all necessary permits for clearing and lowering operations. <br />0 <br />5 <br />Clear vegetation from river islands, stock pile vegetation for <br />burning, and push island sand into the surrounding river channel. <br />$40,000 <br />40,000 <br />6 <br />Construct 2 woody debris piles in the river channel of each study <br />site to assist the river in buildina sandbars. <br />$5,000 <br />5,000 <br />7 <br />Measure the channel bed, sandbar, and remaining island <br />topography at each study site after the clearing and lower <br />operations. Accomolished by task I.C.6 <br />0 <br />8 <br />Install 2 time - lapsed cameras at each study site. Accomplished by <br />I C 4 <br />tasks I.C.4 &7. <br />0 <br />9 <br />If necessary, test the performance and effects of mechanically <br />constructing sandbars. <br />$40,000 <br />! <br />40,000 <br />10 <br />If necessary, test the performance and effects of redirecting river <br />velocities to erode veaetated islands. <br />$40,000 <br />40,000 <br />