Agenda - Council - 09/10/2019 - Laserfiche WebLink

Home

INTRODUCTION: The City of Ramsey (City) is requesting proposals for the preparation and delivery of a geotechnical report along Variolite Street as shown in the attached exhibit. Variolite Street is a 2.25 mile collector street with an ADT of 1,300 and a 50 mph speed limit. The scope of this work includes: • 61 soil borings per the attached exhibit • A standard geotechnical report including construction feasibility for public utilities and pavement section • Logs of soil borings with descriptions of nomenclature used for defining the site soils • Estimated subgrade support strength parameters for design of the bituminous roadways and recommendations for soil corrections • Recommendations for earthwork associated with installation of storm sewer, watermain, and sanitary sewer • Recommendations for management of groundwater for design of structures and pavements SOIL BORING REQUIREMENTS: Soil borings to a depth of 10-feet will be taken at stationing shown on the attached "Boring Hole Location" exhibit. Soil borings will alternate between drive lanes. Cores of the existing bituminous pavement will be required. Cores will be taken to verify thickness and structural integrity of the existing pavement and base. Pictures of the cores will be included in the final report. In the area identified as Groundwater Investigation Area on the attached exhibit, borings must be deep enough to locate groundwater. Any additional depth beyond 10-feet will be paid per lineal foot. The Contractor must perform sufficient survey work to locate holes approximately 5 feet horizontally and approximately 0.5 feet vertically. The Contractor is responsible for locating all utilities prior to starting boring operations. SOIL BORING LOG REQUIREMENTS: A field boring log will be prepared by the Contractor for each boring with a copy included in the final report. The field boring logs will include the following information: • The project identification number • Location of the boring referenced by centerline stationing using the Anoka County Coordinate System with NAD 83 • Boring log number • Method of drilling and sampling, diameter of bore hole • Date, name of driller and crew • Ground surface elevation and ground water elevation measured to the nearest 0.5 feet • Definition of all symbols that are not otherwise self-explanatory • Classification, thickness, color, moisture condition (dry, moist, wet, saturated), composition and degree of compactness • Field number of any samples taken, type of sample and depth taken • Depth at which obstacles were encountered in advancing the boring • Any other unusual conditions encountered during drilling and sampling 2