Laserfiche WebLink
There will be no measurement for payment of Task 3, Rock Check Dams. Payment for this <br /> Task will be reflected in a lump sum bid under Item 3 on the Bid Schedule. This lump sum bid <br /> will cover all costs for excavating, hauling, placing and placing the rip-rap material as described <br /> in these specifications. <br /> Task 4 <br /> Drainage Repair and Construction: <br /> A large gully has formed on the lower end of the steep riprap channel where the drainage <br /> transitions between rock and an earth lined channel. Approximately 2:50 feet of rip rap channel <br /> will need to be constructed or repaired as indicated on Drawing 1, Slone Drainage Course Cross <br /> Section and Plan View. <br /> Drainage Dimensions: A channel no steeper than 3H:1 V being eight(8)foot wide, eight(8)foot <br /> jh dfain��l will be constructed from the end of the existing rip rap channel to the <br /> bottom portion of the slope as located by the PROJECT MANAGER. <br /> 0 <br /> Drainage Rock Sizing: The bottom of the drainage channel will be lined WW4 a minimum 30" <br /> depth of riprap. Using on site materials, the riprap sots will consist of a combination <br /> of 20%minimum 4'diameter rock, 40%minimum 2'to 3' diameter rock and 40% 12"to 18" <br /> diameter rock. <br /> Sa <br /> Drainage Rock Placement: The 4'diameter rock be keyed into the; bottom constructed <br /> 3H:1V channel through excavation placement xten oveoun ore than 30" Ngh- Le <br /> S,aiid-placed every 20' in slope length. The 12"to 18"diameter rock will be placed and compacted <br /> 01 into the bottom of the excavated channel. The 2'to 3' diameter rock will then be placed over the <br /> smaller rock to fulfill the 30" minimum riprap depth requirement. Placement will be such that o <br /> voids will be eliminated to the best extent possible with rock contacting rock. Side slopes te-the <br /> constructed channel will be at a maximum 3HAV slope. Side slope riprap will extend up the <br /> sides of the constructed channel to a minimum 4'height. <br /> Material excavated as a result of drainage course construction may be:excavated and hauled to <br /> or graded against the excavated bench cuts as noted on the drawing. Prior to depositing or <br /> grading excavated material against the excavated bench cuts, existing vegetation and soils to a <br /> 24"depth will be graded off and stockpiled. Stockpiled vegetation and soils will be evenly <br /> redistributed over the deposited material from drainage course construction upon completion of <br /> earthmoving procedures. <br /> If any trash is encountered during excavation for channel construction, trash will be hauled off to <br /> the nearest County approved landfill site. <br /> Measurement and Payment <br /> The constructed channel will be measured to the nearest linear foot. Measurement for payment <br /> will consist of physically measuring the length of the channel. Payment for this task will be paid <br /> for at the prices established in Item 4 of the Bid Schedule per linear foot installed. Such <br /> payment shall be considered full compensation for all labor, materials„ equipment and all other <br /> items necessary and incidental to the construction of the channels to the specifications, <br /> -9- <br />