Laserfiche WebLink
Alpine Drive—Street Improvements <br /> Ramsey,Minnesota <br /> NTI Project No.16.61770.100 <br /> SUBSURFACE EXPLORATION SUMMARY <br /> NTI performed the subsurface exploration program on November 7 2016 with a two-person crew using a <br /> truck-mounted CME-55 drill rig. Samples were generally collected in accordance with ASTM D 1586 <br /> "Standard Test Method for Standard Penetration Testing (SPT) and Split-Barrel Sampling of Soils." <br /> The boring locations and depths were determined by a representative with the City of Ramsey. The <br /> boring locations were staked in the field by NTI. The borings terminated at nominal depths 11.0 feet <br /> below the existing pavement surface. . <br /> Elevations were not provided to NTI,therefore, NTI has assumed a ground surface elevation of 100.0 <br /> feet for each of the boring locations. Please refer to the Boring Location Diagram,the Boring Logs in <br /> Appendix C, and the Pavement Core Photographs in Appendix D. <br /> Alpine Drive—(Borings A-1 through A-13) <br /> Bituminous pavement thickness within this roadway area ranged from approximately 3.5 to 5.0 inches at <br /> the boring locations. Apparent aggregate base was not observed at the majority of the borings. As <br /> exceptions, apparent aggregate base was observed at Boring A-2, A-4, A-5, A-7, and A-10 locations and <br /> varied in thickness from approximately 2.5 to 24.0 inches. Occasional cobbles and hard drilling <br /> conditions were encountered at Boring A-6, A-7, A-9, A-10,A-12 and A-13 locations. <br /> Previously placed fill soils, generally consisting of poorly graded sand with silt and poorly graded sand <br /> with silt and gravel (SP-SM), poorly graded sand with clay(SP-SC) and clayey sand (SC), were <br /> encountered extending to depths ranging from approximately 3.0 to 9.5 feet below the top of <br /> pavement. <br /> Native alluvial soils consisting of poorly graded sand (SP) and poorly graded sand with silt (SP-SM) were <br /> commonly observed extending to the boring termination depths. Varying amounts of gravel were <br /> encountered throughout the boring locations. <br /> Groundwater was observed in the boreholes at Borings A-5 and A-9 locations at the time of drilling at <br /> depths of 10.0 and 10.5 feet respectively. Please refer to the boring logs included in the appendices. <br /> Page 2 of 8 <br />