Agenda - Council - 01/12/2021 - Laserfiche WebLink

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Ramsey Tiger Street Infrastructure Replacement December 11, 2020 Project #: 17623.20. M NS Page - 3 in the ground. With this method, a hollow -stem auger is drilled to the desired sampling depth. A 2-inch OD sampling tube is then screwed onto the end of a sampling rod, inserted through the hole in the auger's tip, and then driven into the soil with a 140-pound hammer dropped repeatedly from a height of 30 inches above the sampling rod. The sampler is driven 18 inches into the soil unless the material is too hard. The samples are generally taken at 21/2 to 5-foot intervals. The core of soil obtained was classified and logged by our drilling personnel at the site and a representative portion was then sealed and delivered to our laboratory for further review. At the surface, the pavement borings encountered about 1 1/2 to 5 inches of asphalt over 0 to 8 inches of aggregate base or recycled aggregate. Several borings encountered about 1/2 foot or less of buried topsoil below the pavement materials. Below the surface materials, most of the borings encountered fill to possible fill to depths of 1 to 6 1/2 feet. The fill consisted primarily of rather clean sands to silty sands. Below the surface materials and fill, most of the borings were dominated by clean sands natural sands (poorly graded sand and poorly graded sand with silt). Boring B-02 encountered a layer of clayey sand at the 10-foot termination depth. For the reader's convenience, we have summarized the soil boring data in the following cross-section. The reader is referred to the boring logs in the Appendix for more detailed information. 911 909 907 905 903 a� 901 LL 899 897 0 895 893 891 .0 889 EL 887 CL a 885 883 881 879 877 875 North -----------------------South ------------------------------------------------------------------------------------------------------------------------------------------------------------ 10 9 8 7 6 5 4 3 2 1 Boring Number in Pave Mat'I ■ Topsoil o Fill -Silty Sand ® Fill -Sand ❑Sand m Clayey Sand ❑ Below Boring M I N N E S 0 T A 1 0 W A W I S C 0 N S I N