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425-15 SOIL CONSERVATION SERVICE SPECIFICATIONS GUIDE Excavation To the extent that it is needed, all suitable materials removed from the exca- vations shall be used in the construction of the earthfills. All surplus or unsuitable excavated material shall be disposed of at a suitable location or as specified. When the quantity of suitable material obtained from the excavation is not sufficient to construct the fill , additional material shall be obtained from the borrow area(s). The top six (6) inches of borrow areas and areas where } fill is to be placed shall be stripped and stockpiled. Stripping shall be performed just prior to excavation in order to reduce potential erosion. Fill All fill material shall be obtained from the required excavation and borrow area(s). Fill material shall contain no sod, brush, roots, or other perish- able materials. Rock particles larger than six (6) inches, where fill is not adjacent to structures, shall be removed. If fill is adjacent to a structure, the maximum rock particle size shall be three (3) inches. The fill shall be placed in approximately horizontal layers extending the entire length and width of the embankment. No fill shall be placed on a frozen surface. No ice, snow, or frozen material shall be incorporated in the fill . The material shall contain sufficient moisture to permit_satisfactory compaction. _ Compaction requirements for the fill are as follows: a. For fills less than 20 feet high at the low point on the centerline of the embankment, each layer of fill shall be compacted by routing the hauling and spreading equipment over the fill in such a manner that every point on the surface will be traversed by not less than one tread track of the loaded equipment traveling in a direction parallel to the main axis of the fill . Maximum thickness of each layer of fill is 12 inches. b. Adjacent to structures, compaction of fill shall be accomplished by means of manually directed power tampers or plate vibrators unless otherwise specified. Heavy equipment shall not be operated within two (2) feet of any structure. Compaction by means of drop weights operating from a crane . or hoist of any type will not be permitted. Other Wisconsin Construction Specifications which may be applicable are: 1. Clearing; 2. Excavation; 3. Earthfill ; 4. Concrete; 4A. Concrete; 7. Conduits: Concrete Pipe, Clay Pipe, and Asbestos - Cement Pipe; 10. Fencing; 11. Fertilizing, Seeding, and Mulching. USDA-SCS-Wisconsin Section IV Technical Guide 10/83