03-27-2002 Council Agenda - Laserfiche WebLink

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645 -3601 TWIN CITY TESTING AND ENGINEERING LABORATORY. INC. REPORTED TO: ENGINEERS AND CHEMISTS 662 Cromwell Avenue - St. Paul, Minn. 55114 REPORT OF: EXCAVATION INSPECTION PROPOSED FUTURE EXPANSION BUILDING AREA - ACRYLTECH DATE: LITTLE CANADA, MINNESOTA Rauenhorst Corporation FURNISHED BY: 4444 Rauenhorst Circle COPIES TO: Edina, MN 55435 September 5, 1972 LABORATORY No. 9 -4010 Village of Little Canada Building Inspection Dept. Attn: Mr. Les Layten INTRODUCTION This report concerns the recent inspections our firm performed of the soil conditions at the above referenced project. No preliminary soil borings were performed at the site. However, results of deep penetration borings performed within the general area for other construction were available for our use during the inspection. These reports indicated the generalized soil profile to consist of varying depths of peat and soft alluvial soils underlain by more competent coarse alluvium and till materials. In general, the ground surface in the area slopes downward from north to south. We understand the building will be a one - story, slab -on -grade structure. The floor will be at elevation 889'. The structure will be supported on continuous strip exterior foot - ings and isolated interior column footings designed to rest on soil having an allowable ,aring capacity of 3000 psf. The majority of the perimeter footings will be located at elevation 886' with two step -down areas to 883'. The interior footings will be located immediately below the floor slab elevation. We understand the foundation plan is to excavate any peat and soft alluvial soils and then place a compacted fill to grade. In general, the structure will be supported at minimum depth on the fill. However, in the north portion of the site the grade is such that it should be possible to support the footings and floor slab on the natural granular soils. In addition to the area proposed for present construction, the earthwork is to be performed in an area designated as future construction located to the southwest of the present area. In general, the purpose of our inspection was to determine if the exposed soils in the excavation were suitable from which to begin fill placement. INVESTIGATION Between August 1 and August 17, 1972, we performed a series of visual inspections of the excavation. The exposed soils were visually and manually classified in accordance with the Unified Soil Classification System and estimates were made of their strength properties. Several shallow hand auger borings were put down to determine local subsurface soil condi- tions. In the southeast portion of the area presently scheduled for construction we observed the removal of layers of peat, soft gray silty clay and marl. The underlying soils consisted of brown medium consistency silty clay or brown, fine - grained sand. In general, the 'lty clay was found in the easternmost portion of this section and the sand in the western rt. At the time of our inspection there was up to-1' of waterponded in the excavation. The depth of excavation increased from north to south with bottom of excavation elevations ranging from approximately 875' to 870'. We also inspected the soils in the vicinity of the AS A MUTUAL PROTECTION TO CLIENTS. THE PUBLIC AND OURSELVES. ALL REPORTS ARE SUBMITTED AS THE CONFIDENTIAL PROPERTY OF CLIENTS, AND AUTHOR IZATION FOR PUBLICATION OF STATEMENTS. CONCLUSIONS OR EXTRACTS FROM OR REGARDING OUR REPORTS IS RESERVED PENDING OUR WRITTEN APPROVAL.