Laserfiche WebLink
<br /> Welsh Constru.ction <br /> 8200 Nonnandale Boulevard, Suite 200 <br />. Minneapolis, Minnesota 55437-1060 <br /> 612.897.7860 fax 612.897.7868 <br /> MEMORANDUM <br /> October 7, 1997 <br /> To: D;ok Zdrring r <br /> From: Jim TOdO <br /> Re: Phase II Soil Correction <br /> Based on the soil conditions indicated by the soils report prepared by Braun Intertec, all <br /> vegetation and topsoil should be removed before placement of fill, footings or floor slabs. <br /> Excavation of existing fill and soft to rather soft clays will also be required to limit settlements. <br /> Grading in the pavement areas should include stripping the vegetation and highly organic soils, <br /> and removing soft clays ",ithin 3 feet of subgrade elevation before placing the fill and the <br /> pavement materials. <br />. According to the site plan, some areas will be cut to grade to reach proposed floor elevations. At <br /> those locations, subexcavations will be needed to remove soft clays. Because these soils have <br /> relatively high moisture contents, it will be necessary to aerate and dry these soils before <br /> placement and compaction, <br /> Wet and waterbearing soils were observed in some borings and water will likely accumulate in <br /> the excavation bottoms, particularly where waterbearing sand layers are unearthed during site <br /> grading and footing excavation. Dewatering may be necessary during excavation and prior to <br /> backfilling. Because the primary soils at this site are clay, we anticipate it will be possible to <br /> remove the water in footing trench excavations by pumping from temporary sumps in the <br /> excavation bottom. During general site grading operations, trenching may be needed to dewater <br /> and route water seepage away from the construction area, <br /> xc: Greg Anderson <br />. <br />