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DocuSign Envelope ID:07A4359F-6D47-4987-B1F1-BF667ACBB3BA <br /> RIPRAP - 313700 <br /> B. Stone riprap shall be placed in a manner that will not damage geotextile or other facilities. Riprap <br /> shall not be dropped from a height exceeding three feet. <br /> C. The quantity of small stones shall be kept as low as possible,sufficient only to fill the voids between <br /> the larger stones. Care shall be taken that this small material is well distributed throughout the <br /> mass and not allowed to segregate or form pockets of small stone. All bridging shall be broken <br /> down. Large interstices, or open channels, or voids shall be filled by chinking or otherwise <br /> manipulating the stones. <br /> D. The finished riprap surface shall in general conform to the slope lines shown on the Drawings. No <br /> objectionable, hazardous, or unsightly projections above the general place surface will be <br /> permitted. <br /> E. The tolerance in riprap thickness in place shall be-0 to+0.3 feet. <br /> 3.5 CONSTRUCTION OF GROUTED RIPRAP <br /> A. Grouted rock riprap shall constructed upon the prepared foundation using hand placement and <br /> the stone shall be set or placed are close together as is practicable in order to reduce the voids <br /> to a minimum. Construction of riprap on slopes shall begin at the bottom and shall progress <br /> upward in approximately horizontal layers. <br /> B. When rock riprap is constructed in layers,the layers shall be thoroughly tied together with large <br /> stones protruding from one layer into the other. <br /> C. The standard depth of rock riprap shall be 18 inches, unless otherwise indicated or directed. <br /> Rock riprap shall have an average depth for each 25 square feet of not less than the depth <br /> indicated on the Drawings or as directed by the ENGINEER, or the standard depth required in <br /> these Specifications. <br /> D. Each stone shall be bedded with the depth perpendicular to the surface upon which it is set.The <br /> length shall be placed as directed by the ENGINEER and each main stone shall be placed against <br /> the adjoining stones with sides and ends in contact.The stone shall be placed in such a manner <br /> as to stagger all joints as far as it is possible. <br /> E. After chinking and filling, the voids between the stones shall be completely filled with grout. <br /> Care shall be take to prevent earth or sand from filling the spaces between the stones before <br /> the grout is poured. <br /> F. This grout shall be mixed either in a one-bag mixer or larger,for not less than 1-1/2 minutes, or <br /> it may be mixed by hand in a watertight box of sufficient capacity to accommodate a batch of at <br /> least one bag of cement. Hand mixing shall be continued in a manner and for a period <br /> satisfactory to the ENGINEER. <br /> G. Immediately before pouring the grout, the stones shall be wetted by sprinkling. The grout shall <br /> be carefully poured into the voids between the stones. This work shall begin at the lower <br /> portions of the riprap and progress upward. The entire bottom line of voids shall be filled with <br /> grout before the next line of voids above is poured. The pouring of the grout shall be <br /> accomplished by the use of vessels of adequate size and shape. Broadcasting, slopping, or <br /> Orange County Solid Waste Drainage Repairs DAA 2200365/TRC 017055.0000.0000 <br /> Drainage Repair Project November 2023 <br /> Orange County, INC 313700-3/4 <br />