Pipe culverts Sample Clauses

Pipe culverts. Do not place or backfill pipe that meets any of the following conditions until the excavation and foundation have been approved in writing by the CO: (1) Embankment height greater than 6 feet at subgrade centerline. (2) Installation in a protected streamcourse. (3) Round pipe with a diameter of 48 inches or greater.
Sample 1
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Pipe culverts. The width of the pipe trench shall be sufficient to permit satisfactory jointing of the pipe and thorough tamping of the bedding material under and around the pipe. Where rock, hardpan, or other unyielding material is encountered, it shall be removed below the foundation grade for a depth of at least 300 mm or 4 mm for each 100 mm of fill over the top of pipe, whichever is greater, but not to exceed three-quarters of the vertical inside diameter of the pipe. The width of the excavation shall be at least 300 mm (12 inches) greater than the horizontal outside diameter of the pipe. The excavation below grade shall be backfilled with selected fine compressible material, such as silty clay or loam, and lightly compacted in layers not over 150 mm (6 inches) in uncompacted depth to form a uniform but yielding foundation. Where a firm foundation is not encountered at the grade established, due to soft, spongy, or other unstable soil, such unstable soil under the pipe and for a width of at least one diameter on each side of the pipe shall be removed to the depth directed by the Engineer and replaced with approved granular foundation fill material properly compacted to provide adequate support for the pipe, unless other special construction methods are called for on the Plans. The foundation surface shall provide a firm foundation of uniform density throughout the length of the culvert and, if directed by the Engineer, shall be cambered in the direction parallel to the pipe centerline. Where pipe culverts are to be placed in trenches excavated in embankments, the excavation of each trench shall be performed after the embankment has been constructed to a plane parallel to the proposed profile grade and to such height above the bottom of the pipe as shown on the Plans or directed by the Engineer.
Sample 1
Pipe culverts. Amend the description of subclause 5.1.1 to include groundwater drains.
Sample 1

Related to Pipe culverts

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  • Unbundled Copper Sub-Loop (UCSL) is a copper facility of any length provided from the cross-box in the field up to and including the end-user’s point of demarcation. If available, this facility will not have any intervening equipment such as load coils between the end-user and the cross-box.

  • Drainage Systems (1) Clear culvert inlets, outlets, and sediment catching basins. (2) Maintain waterbars, drainage dips, and other water diversion measures. (3) During active use, patrol and maintain functional drainage. (4) Repair damaged culvert ends.

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