2004-013.C - Laserfiche WebLink

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No compensation will be allowed for such excavation and the Contractor shall include its cost in the prices bid . ' The materials of excavation shall include all materials encountered, such as clay, sand rock, marl , muck, gravel, boulders , heterogeneous fill materials , old timbers , or any combination of these . Any unforeseen obstacles ' such as buried trees or timbers, abandoned utilities, metal objects , concrete masses or any debris encountered shall be removed. All "materials of excavation" and " unforeseen obstacles " will be considered ' as incidental to construction and no additional compensation will be allowed. ' All roots, stumps, logs, limbs , boulders or any material which is not suitable for backfill material shall be removed from the site promptly as excavated and disposed of by the Contractor at his expense . 3 . Length of Trench to be Opened - The length of trench to be opened or the area g P g P of surface to be disturbed and unrestored at any time will be limited by the ' Engineer with regard to expeditious construction and the convenience of the Owner. Excavation shall not advance more than 100 feet ahead of the pipe laying without the consent of the Engineer. 4 . Sheeting and Bracing - The Contractor shall be responsible for properly supporting the sides of all trenches and excavations with timbers or other supports wherever necessary or required to properly safeguard the trenches , adjacent properties and structures and at restricted right-of-way . The cost of ' all necessary timber, sheeting and bracing whatsoever (left in place or removed), shall be included in the unit prices bid under force main installation. ' Portions of the timber sheeting driven below the elevation of the top of the pipe shall not be disturbed or removed . Timber sheeting and bracing shall be left in place if so ordered by the Engineer and/or where shown on the Plans to avoid undermining or otherwise endangering the work or adjacent structures . ' All sheeting left in place shall be cut off or driven at least 18 -inches below finished grade, unless otherwise ordered . tGreat care shall be exercised in the selection of sheeting and bracing of adequate design, type , size and strength. The adequacy of the timber used for all supporting and bracing purposes shall be the responsibility of the Contractor, who shall use only men of seasoned experience for this type of work. The sizes and lengths of the timber used shall conform closely to the needs of the work and oversizing as well as undersizing should be avoided . In placing and driving the sheeting , proper workmanship and ' equipment shall be used to achieve a true alignment and close contact of the sheeting boards . Timber sheeting shall be straight and sound; free from shakes , cracks, large or loose knobs and other defects impairing its C :\Down1oad\techspec-0250 Ldoc SC501 - 6