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<br />Works of Improvement <br /> <br />Floodway Control Structures <br /> <br />Drop structures out of the Highline, Settlers and Petersen Ditches will <br />have radial gates to control flows into Floodways 1 and 2. Floodway 1 <br />wi 11 have a 10-foot wide radial gilte and a 4-foot widesl ide gate at the <br />Highl ine Canal and at the Settlers Ditch" and a 14-foot gate out of the <br />Petersen Ditch. A 12-foot wide r~dial gate will inlet into Floodway 2 <br />from the Highline Canal and another one will inlet from the Settlers <br />Ditch. These gates are included in floodway costs. <br /> <br />There will be water control checks in the Highline Canal and Settlers <br />Ditch where Floodway I intersects and in all three canals where Floodway <br />2 intersects. These will be stop~log type checks so the canals can be <br />blocked to divert flows into the floodways if considered necessary by <br />the canal personnel. Capacities for these five water control checks (H- <br />I, S-l, H-2, S-2 and P-2) are shown in Table 3C. <br /> <br />Fencing and Seeding <br /> <br />Fencing will be a construction cost with specifications satisfactory to <br />the Soil Conservation Service and the Colorado Division of Wildlife. <br />Al-l -eens-t-r-uc-t-ten--areas--of-, the -f-leodways --wi 1,1 -be reseede<l-as -& -c-ens,truc- <br />tion cost to reduce erosion and sedimentation in the channels. Grass <br />plantings will be made that are selected for their contribution to <br />eros'ion control and wildlife habitat food and cover. <br /> <br />CANAL AND FlOODWAY INLETS <br /> <br />There wi II be 10 canal inlets into the Highl ine Canal. These drop <br />structures will be located on the natural waterways below the 10 flood-, <br />water retarding structures to prevent headcutting from ,prolonged princi- <br />pal spi llway discharge flows. <br /> <br />Canal inlets on waterways where bedload movement may take place will <br />have crests set to provide a debris basin to prevent sedimentation of <br />the cana I . <br /> <br />Capacity of canal inlet is the greater of the high-stage principal <br />spillway flow from the upstream dam or the lO~year frequency peak storm <br />runoff. Larger flows will be passed over earth spillway sections in the <br />collecting dikes and into the canal ,without damage to the drop structures. <br /> <br />41 <br />