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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 be at a ratio of 2H:1V. The dam crest <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 <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 B 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, <br />and will be paid for under item 15. <br />Measurement and Pavment <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 />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 />Measurement and Pavment <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 />8 <br />