Landau Associates 5/9/2016 - Laserfiche WebLink

Proposal for Geotechnical Engineering Services Landau Associates will be held in our laboratory for 30 days after submittal of the final report.After that date, the soil samples will be disposed of unless arrangements are made to retain them. • A geotechnical engineer from LAI will analyze the data obtained from the field explorations and laboratory testing to develop geotechnical recommendations to support design and construction of the project. • Prepare and submit a geotechnical engineering report summarizing the expected subsurface soil and groundwater conditions at the site.Also included in the report will be a figure showing the approximate locations of the borings completed for this study, interpreted logs of the borings,and geotechnical design parameters for the project, including: — Discussion of soil and groundwater conditions at the site — Recommendations for site preparation, including overexcavation and replacement requirements should unsuitable soil be encountered within the proposed bridge footprint;temporary and permanent slopes; import fill requirements;fill placement and compaction criteria;and subgrade preparation for foundations — Recommendations for shallow foundation support of the new bridge foundation; maximum allowable soil bearing pressure;minimum footing size; minimum depth of burial (frost depth);and resistance to lateral loads(passive earth pressure and friction coefficient) — Estimated short-term and long-term settlements of foundations — Recommendations for lateral earth pressures(presented in terms of equivalent fluid pressures)under static and dynamic loading conditions for use in design of the bridge abutments and head walls — Conclusions regarding the anticipated need for dewatering the footing excavations that will be required to replace the existing culvert. Included will be a discussion of appropriate dewatering systems for the proposed construction — Recommendations for geotechnical monitoring and construction support services. The deliverables provided for this scope of services will be a draft and final geotechnical engineering report. The draft geotechnical engineering report will be provided to the City of Everett for review. Comments will be reviewed and incorporated into a final geotechnical engineering report. Both the draft and the final submittals of the geotechnical engineering report will be sent electronically in Adobe PDF format. Assumptions LAI assumptions are: • City of Everett will provide a current site plan and survey of the site in electronic format. • Actual depths of footing required for scour will be provided by the City of Everett. Evaluation of scour depth is not included in our scope of work. • The proposed exploration program can be performed without the need for traffic control personnel. March 25,2016 2