Service Installations & Groundwater during Construction Sample Clauses

Service Installations & Groundwater during Construction. Provided groundwater conditions during construction are similar to those encountered during the investigation, no major groundwater problems are anticipated for the construction that is proposed. Although no specialized dewatering requirements are anticipated, water was encountered in Borehole 2 on Catharine Street and Borehole 0 xx Xxxx Xxxxxx. In Borehole 2, water problems would arise for excavations deeper than approximately 5.9 metres below grade, otherwise water problems would unlikely be an issue. As mentioned in Section 4.0, it was noted that the Sand in Borehole 8 was saturated with depth. The subsurface information suggests that a water table at between 2.5 and 3 metres may be encountered during the trench excavation. It is noted that the samples’ N values drop very considerably at the water level. This could well imply some quicking of the sand at that level. If so, sophisticated dewatering may be required if the trench is to penetrate below that depth. Testpits along the city streets are not practical. However, some allowance should be made in the contract documents to address potential problems (e.g. additional granular, trench instability), if significantly wetter conditions are encountered at the time of construction. In general, it is recommended that services installations be carried out in relatively short sections, and that no section of trench remain open for an extended period of time. This will minimize the potential for trench side instability. Surface water should be directed away from any open excavations. Other than the groundwater considerations, no excavation problems through the native soils or granular fills are anticipated for the municipal services installations along the proposed alignments. However, below depths of THESE DOCUMENTS AVAILABLE FOR PURCHASE AT CITY HALL