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i <br /> rip-rap will be placed so that the crest of the spillway is 2 feet above the channel bottom. <br /> Upstream and downstream side slopes of the dam will beat a ratio of 2HAV. The dam crest j <br /> will be 12 feet long and will slope up to the top of the channel sides. The apron will be filled with <br /> loose, angular rock of the same dimension as that for the dam. The top of the apron will be <br /> level with the channel bottom. A 6 inch high sill will be placed along the downstream end of the j <br /> apron. Channel side slopes will be protected at each check dam by placing rip-rap from the toe; <br /> of the apron to the top of the dam. <br /> The completed channel will carry runoff to a 36 inch culvert under the county road. The sides <br /> of the channel and road embankment will be armored with angular rip-rap as shown in Drawing <br /> 4. The culvert discharges into Pond 15-P2 . The discharge point will be armored with angular <br /> riprap consisting of durable irregular rock having a minimum D-50 of 9 inches and a D- <br /> maximum of 18 inches. The armored slope will be centered below the point of discharge and <br /> will be 8 feet wide, 10 feet long, and 2 feet deep. Rip-rap must be keyed into the pond inslope <br /> on the downstream end. This key will consist of a trench 8 foot wide, 2 feet long, and 4 feet <br /> deep. <br /> Rip-rap will be imported and must be approved by the Project Manager prior to hauling to the <br /> site. <br /> Revegetation shall be completed according to specifications in 20.0 Revegetation, attached, j <br /> and will be paid for under item 15. <br /> i <br /> Measurement and Payment <br /> There will be no measurement for payment for Task#4. Payment for Task#4 will be reflected <br /> in a lump sum bid under Item 4 on the Bid Schedule. <br /> Task 5-Spillway Restoration - Pond 15-P2 <br /> I <br /> The emergency spillway on Pond 15-P2 will be lowered approximately three (3) feet, shaped, <br /> and lined with rip-rap (See Map 3). The final bottom elevation will be marked by the project <br /> Manager. The new lined spillway bottom will be 25 feet long and 3 feet below the current dam <br /> crest. The spillway side slopes will be sloped to 3:1. The spillway bottom, side slopes, and <br /> outslope shall be lined with riprap (total riprap thickness of 24 inches) as shown in drawing 3. <br /> Rip-rap material for the spillway must consist of durable irregular rock having a minimum D-50 <br /> of 6 inches and a D-maximum of 9 inches. Rip-rap will be imported and must be approved by <br /> the Project Manager prior to hauling to the site. <br /> I <br /> Measurement and Pavment j <br /> There will be no measurement for payment for Task#5. Payment for Task#5 will be reflected ; <br /> in a lump sum bid under Item 5 on the Bid Schedule. <br /> I <br /> i <br /> 8 <br /> i <br />