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ri <br />r <br />C. Subbase Material: Naturally or artificially graded mixture of natural or crushed <br />gravel, crushed stone, crushed slag, natural or crushed sand. <br />D. Drainage Fill: Washed, evenly graded mixture of crushed stone, or crushed or <br />uncrushed gravel, with 100 percent passing a 1 -1/2 in. sieve and not more than 5 <br />percent passing a No. 4 sieve. <br />E. Backfill and Fill Materials: Satisfactory soil materials free of clay, rock or gravel <br />larger than 2 in. in any dimension, debris, waste, frozen materials, vegetable and <br />other deleterious matter. <br />PART 3 - EXECUTION <br />3.01 EXCAVATION <br />06/07 <br />A. Excavation is Unclassified, and includes excavation to subgrade elevations <br />indicated, regardless of character of materials and obstructions encountered. <br />B. Unauthorized Excavation: Removal of materials beyond indicated subgrade <br />elevations or dimensions without specific direction. Unauthorized excavation, as <br />well as remedial work directed by Engineer, shall be at Contractor's expense. <br />C. Additional Excavation: <br />1. When unsuitable bearing materials are encountered at required subgrade <br />elevations, carry excavations deeper and replace excavated material as <br />directed by Engineer. <br />2. Removal of unsuitable material and its replacement as directed will be <br />paid on basis of contract conditions relative to changes in work. <br />D. Stability of Excavations: <br />1. Slope sides of excavations to comply with local codes and ordinances <br />having jurisdiction. <br />2. Shore and brace where sloping is not possible because of space <br />restrictions or stability of material excavated. <br />3. Maintain sides and slopes of excavations in safe condition until <br />completion of backfilling. <br />E. Shoring and Bracing: <br />1. Establish requirements for trench shoring and bracing to comply with local <br />codes and authorities having jurisdiction. <br />2. Maintain shoring and bracing in excavations regardless of time period <br />excavations will be open. Carry down shoring and bracing as excavation <br />progresses. <br />F. Dewatering: <br />1. Prevent surface water and subsurface or ground water from flowing into <br />excavations. <br />2. Do not allow water to accumulate in excavations. <br />02200 -2 03 -4197 <br />