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. �� �aYS�� �2u� <br /> H A, u G Q ZI�13--01041 <br /> _ <br /> . <br /> September 22,2014 Project Number: 14-681 <br /> Mr. Ethan Kindseth <br /> Gonyea Homes <br /> 10850 Old County Road 15,Suite 200 <br /> Plymouth, MN 55441 <br /> RE: Soil Evaluation,Boulder Retaining Wall,75 Bay 'de Trail,Orono,MN <br /> Dear Mr. Kindseth, <br /> This letter summarizes the results of the soil borings a laboratory analysis completed to aid in <br /> evaluating construction of the boulder retaining wall a the above referenced address in Orono, <br /> Minnesota. Our services were completed as requested by you and included; completing hand auger <br /> soil borings, laboratory Proctor tests, moisture content nd organic content tests and preparing a <br /> brief summary letter of our findings with soil parameters or wall analysis and design. <br /> Project and Site Des iption <br /> Two boulder landscape retaining walls were recently co tructed at 75 Bayside Trail in Orono, MN <br /> along with the newly constructed single family home. W 111 was a relatively long wall (approx 135 <br /> feet)that generally extends southward from the Deck nea the southwest corner of the home. Wa111 <br /> is a tiered wall, about 4 feet tall,stepped back about 31/z et and then another 4 foot tall wall. Wall <br /> 2 is a single wall about 51/z feet tall that extends about 1 feet to the east off the northeast corner of <br /> the home. <br /> We understand that the walls were constructed wit out any engineering design documents. <br /> Because of that the City of Orono requested that an engi eering analysis of the as-built condition of <br /> the wall be completed. We further understand that defec s, if any,would be required to be repair or <br /> the wall replaced to meet code requirements. <br /> Results <br /> Wall Observations We observed the general conditi of the wall and estimated the average <br /> boulder/rock width to range from about 24 to 32 in hes, the average boulder thickness was <br /> estimated to be 20 inches and the batter was estimated to range from about 9 to 12 inches. We <br /> excavated below a few of the boulders and estimated the verage burial depth to range from about 6 <br /> to 8 inches. <br /> Soil Conditions Six hand auger borings were complete for this project. Hand auger borings HAP- <br /> 1, HAP-2 and HAP-3 were taken near Wall 1 and hand auger borings HAP-4, HAP-5 and HAP-6 <br />