Common use of Excavating Trenches Clause in Contracts

Excavating Trenches. Excavate trenches to the proper grade, depth, and width as follows: 1. Trench to Grade Ensure excavated trench bottoms are firm, free from boulders, and conform to the established grade. a. Backfill, according to Subsection 665.3.05.G, any part of the trench excavated below the established grade. Use Class I or Class II Soils (Section 810), and firmly compact the soil. b. Where the established grade of a trench is in rock, undercut the bottom of the trench by at least 6 in (150 mm), then backfill and compact according to Subsection 665.3.05.G. Conduct blasting operations strictly according to Subsection 107.12. c. Excavate trenches under pavement to grade as follows: 1) To remove the pavement, cut it at least 24 in (600 mm) wider than each trench edge to provide solid bearing for the pavement edges when replaced. Remove the pavement according to Section 444, except no separate payment will be made for sawed joints. 2) Directional Bore under existing sidewalks, curbs, gutters, and pavements according to Section 555. 3) Where possible, jack pipe under an existing pavement according to Section 615, except no separate payment will be made for jacking and boring pipe. 2. Minimum Trench Depth Excavate trenches to provide at least 48 in (1.2 m) cover depth from the pipe to the finished pavement surface, sidewalk, grass plot, etc. unless indicated otherwise on the Plans or by the Engineer. If any part of a gas main is to be placed in or under a new embankment, finish the embankment to at least a 2 ft (600 mm) plane above the pipe barrel before excavating the trench.

Excavating Trenches. Excavate trenches to the proper grade, depth, and width as follows: 1. Trench to Grade Ensure excavated trench bottoms are firm, free from boulders, and conform to the established grade. a. Backfill, according to Subsection 665.3.05.G, any part of the trench excavated below the established grade. Use Class I or Class II Soils (Section 810), and firmly compact the soil. b. Where the established grade of a trench is in rock, undercut the bottom of the trench by at least 6 in (150 mm), then backfill and compact according to Subsection 665.3.05.G. Conduct blasting operations strictly according to Subsection 107.12. c. Excavate trenches under pavement to grade as follows: 1) To remove the pavement, cut it at least 24 in (600 mm) wider than each trench edge to provide solid bearing for the pavement edges when replaced. Remove the pavement according to Section 444, except no separate payment will be made for sawed joints. 2) Directional Bore under existing sidewalks, curbs, gutters, and pavements according to Section 555. 3) Where possible, jack pipe under an existing pavement according to Section 615, except no separate payment will be made for jacking and boring pipe. 2. Minimum Trench Depth Excavate trenches to provide at least 48 in (1.2 m) cover depth from the pipe to the finished pavement surface, sidewalk, grass plot, etc. unless indicated otherwise on the Plans or by the Engineer. If any part of a gas main is to be placed in or under a new embankment, finish the embankment to at least a 2 ft (600 mm) plane above the pipe barrel before excavating the trench. 3. Trench Width Excavate trenches wide enough to allow proper installation of pipe, fittings, and other materials.