2018.02.05 CC Packet - Laserfiche WebLink

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1. INTRODUCTION 1.1 Project Location The borings were completed along Oneka Lake Boulevard from Goodview Avenue North to 157th Street North and along Harrow Avenue North from 157th Street North to 165th Street North. The approximate soil boring locations can be found on the Soil Boring Exhibit in Appendix A. 1.2 Project Description It is proposed to complete culvert replacements along the roadway, as well as possibly extend the water and sanitary sewers from Goodview Avenue to Greene Avenue. The pavement section will be reclaimed. We understand that 3 foot shoulders will be added to the roadway, and the road will remain a rural design. Culvert inverts will likely be within 5 feet of existing road grade, and watermain and sanitary sewer inverts are assumed to be between 8 and 13 feet below existing grade. WSB has developed recommendations for this project in consideration of the proposed layout and configurations as understood at this time. When the additional information is developed about final design, configuration, or other significant factors, the recommendations presented herein may no longer apply. WSB must be made aware of the revised or additional information in order to evaluate the recommendations for continued applicability. 1.3 Purpose and Project Scope of Services Mark Erichson with WSB authorized this work. In order to assist the design team in preparing plans and specifications, we have developed recommendations for installation of underground utilities and pavement reclamation design. As such, we have completed a subsurface exploration program and prepared a geotechnical report for the referenced site. This stated purpose was a significant factor in determining the scope and level of service provided. Should the purpose of the report change the report immediately ceases to be valid and use of it without WSB's prior review and written authorization shall be at the user's sole risk. Our authorized scope of work has been limited to: 1. Mobilization / Demobilization of a Truck Mounted Drill Rig. 2. Clearing underground utilities utilizing the Gopher State One Call. 3. Drilling 19 standard penetration borings to about 14 1/2 foot depths. 4. Sealing the borings per Minnesota Department of Health procedures. 5. Perform soil classification and analysis. 6. Review of readily available project information and geologic data. 7. Providing this geotechnical report containing: a. Summary of our findings. b. Discussion of subsurface soil and groundwater conditions and how they may affect the proposed pavements and utility installations. c. Estimated R -value of the subgrade soils. d. Recommended pavement reclamation section. e. A discussion of soils for use as structural fill and site fill. Geotechnical Report Oneka Lake Boulevard and Harrow Avenue Improvements Hugo, Minnesota WSB Project No. 010893-000 Page 1