138 SECTION 217 SPECIAL ROCK FILL
217.1 -DESCRIPTION : This work shall consist of furnishing and placing at the foot of embankments, inside or outside the neat line, where called for on the Plans or as directed by the Engineer, durable rock in accordance with the Specifications and in reasonably close conformity to the lines, grades, dimension and sections shown on the Plans
217.2 -MATERIALS : The rock for special rock fill shall meet the requirements speci fied in Subsection 704.5.
217.3 -CONSTRUCTION METHODS : Where possible, the material shall be handled as ordinary rock embankment as prescribed in subsection 207.7.3; however, if the location for the special rock fill is not accessible to ordinary placing, the material may be placed by other methods. Foundatio n trenches and other necessary excavations shall be excavated by the Contractor, in accordance with the applicable provision of 212, and approved by the Engineer before the placing of the special rock fill is begun. Unless otherwise shown on the Plans or directed by the Engineer, the rock fill shall extend approximately two ( 2) feet below the bed of the stream.
217.4 -METHOD OF MEASUREMENT : The quantity of work done will be measured in cubic yards of " Special Rock Fill", complete in place and accepted, determined by the method of average end areas.
217.5 -BASIS OF PAYMENT : The quantity, determined as provided above, will be paid for at the contract unit price bid for this item, which price and payment shall be full compensation for furnishing all the material and doing all the work prescribed in a workmanlike and acceptable manner, including all labor, tools, equipment, and incidentals necessary to comple te the work.
217.6 -PAY ITEM : ITEM DESCRIPTION UNIT 217001 -* Special Rock Fill Cubic Yard
* Sequence number
139 SECTION 218 SLOPE AND FOUNDATION PROTECTION
218.1 -DESCRIPTION : This work shall consist of the construction of revetments of stone or concrete, with or without engineering fabric, to prevent erosion of slopes or banks, or to protect foundations, a t places indicated on the Plans or where designated by the Engineer, all in accordance with these Specifications and in reasonable close conformity with the lines, grades, dimension, and cross sections shown on the Plans.
218.2 -MATERIALS : Materials shall meet the requirements specified in the following Sub -sections of
MATERIALS SUBSECTION Cement for Grout 701.1 or 701.3 Engineering Fabric for Erosion Control 715.11 Gabions 715.23 Reinforcement 709.3, 709.4 Sand for Grout 702.1.1 through 702.1.5 and 702.6, or 702.2 Shot Rock 704.8 Stone for Gabions 704.3 Stone for Riprap 704.2
The stone for crushed rock slope protection shall meet the requirements of Subsection 704.6, Class 7, except that of subsection 704.6.3 shall not apply . Acceptance for Gradation of Class 7 aggregate shall be by visual inspection; a written explanation of the manufacturing process shall be provided if requested by the Engineer. Class 7 from a non -approved source, shall not exceed a weighted loss of thirty percent (30%) when subjected to five cycles of the Sodium Sulfate Soundness Test, will be acceptable. An alternate to this gradation shall be AASHTO size No. 1. Certified test data from the producer showing the AASHTO No. 1 material meets the gradation requirements of subsection 703.4. Stone for foundation protection shall conform to the requirements of riprap stone, except for size and shape.
CONSTRUCTION METHODS
218.3 -SLOPE PROTECTION : 218.3.1 -General: The slopes to be revetted shall reasonably conform to the lines, grades, dimensions, and cross sections as shown on the Plans, unless otherwise directed. The placing of riprap or grouted riprap shall start in a trench, the invert of which is parallel to and two ( 2) feet below the toe of the slope, and the trench shall be two ( 2) feet in width. The construction shall progress from the invert of the trench u p the slope to conform to the requirements specified.