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<br />380 203.10 Presplitting. When presplitting is designated in the Contract, the top of the rock slope <br />381 will be established by the Engineer. The Contractor shall drill the bore holes along the slope line, <br />382 maintain the drill holes at the angle designated in the Contract, and ensure that all drill holes aze <br />383 in the same plane. The diameter, spacing, and loading of presplit holes :>hall result in a neat <br />384 break. The presplitting holes shall be drilled for the full depth of the ledge. <br />385 <br />386 The initial presplitting of each geological formation shall be accomplished utilizing a 100 foot <br />387 test section. After drilling, loading, and shooting this test section, the material shall be removed <br />388 so the Engineer can determine if The diameter, spacing, and loading of the presplit holes are <br />389 adequate to give an acceptable backslope. If the results aze determined acceptable by the <br />390 Engineer, the presplitting may continue throughout the geological formation using those methods <br />391 and procedures. If the presplitting is determined unsatisfactory, the Contractor shall make <br />392 adjustments in the spacing, diameter, loading, or a combination thereof of the presplit holes <br />393 utilizing another test section. <br />394 <br />395 Presplitting holes shall be loaded with explosives in accordance with the manufacturer's <br />396 recommendations. The cost of presplitting shall be included in the contract unit price for rock <br />397 excavation. <br />398 <br />399 203.11 Blading, Blading shall consist of famishing motor graders of the specified horsepower <br />400 rating, with operators, for shaping roadway, shoulders, or other azeas as designated by the <br />401 Engineer. <br />402 <br />403 When scarifying is specified the motor grader shall be equipped with an ittdependently operated <br />404 "V" type scarifier and attachments. <br />405 <br />406 203.12 Dozing. Dozing shall consist of famishing crawler-type tractors of the specified <br />407 horsepower rating, complete with operators and bulldozer blades. Rippers, if specified, will not <br />408 be measured and paid for separately, but shall be included in the work. <br />409 <br />410 203.13 Method of Measurement. Items paid for by volume will not tie remeasured but will <br />411 be the quantities designated in the Contract. Exceptions will be made when field changes are <br />412 ordered or when it is determined that there aze discrepancies on the plans im an amount of at least <br />413 plus or minus two percent of the plan quantity. <br />414 <br />415 (a) Excavation. When payment is specified on a volume basis, all accepted excavation and <br />416 borrow will be measured in its original position by cross-sectioning the area excavated. <br />417 These measurements will include authorized excavation of rock, shale, muck, or other <br />418 unsuitable material. All accepted stripping will be measured in stockpiled locations by cross- <br />419 sectioning. <br />420 <br />421 When the excavation conforms to the staked lines and grades, the original cross-sections and <br />422 the staked sections shall be used for the determination of volumes excavated. Volumes will <br />423 be computed from the cross-sections by the average end area or other acceptable method. <br />424 <br />3-10 <br />G \1011001000Z1AVieporl5\KP\Tacnniwl Speufiwtion5 Coc FeEruary 3, 2006 <br /> <br /> <br />1 <br /> <br /> <br />1 <br /> <br /> <br />i <br /> <br /> <br /> <br /> <br />1 <br />1 <br /> <br /> <br /> <br />