1968-02-28 Construction Soil Boring Report

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68-52 Sponsel Craft Builders -2-2/28/68 RESULTS Logs of soils encountered, penetration resistances, and water level observations are plotted on the attached soil boring log sheets. In the area of the proposed house, the lot slopes downward from the front house line to the area of boring ST-3. Sumac are growing in the proposed house area. Boring ST-2, taken near the front house line encountered a non to slightly plastic fine sandy loam lensed with fine sand thruout its 20-foot depth. The topsoil appeared to have been eroded away in the area of this boring. Boring ST-1, taken down the slope from boring ST-2, encountered 1.5 feet of dark brown plastic sandy loam at the surface. Between the 1.5 and 6-foot depths, this boring encountered a silty clay loam and between the 6 and 15-foot termination depth, soils similar to those encountered in boring ST-2 were indicated. The north rear corner of the house was inaccessible to the equipment. However, boring ST-3 was taken as near to the corner as possible. The surface elevation at actual corner is on the order of 2 feet higher than at boring ST-3. Boring ST-3 encountered a black plastic sandy loam to the 4-foot depth. Topographic features would indicate that the depth of black soils would be considerably less along the rear line of the house. Soils ranging from a fine sand to a clay loam were encountered to the 15-foot depth in this boring. Penetration resistances recorded in the borings ranged from 12 to 40 BPF. Water was encountered in probing only boring ST-3. Water was not encountered in probing borings ST-1 and ST-2 to elevations 84.3 and 84.7 respectively. Water was indicated at the 4-foot depth or at elevation 87 in probing boring ST-3. The current lake level is at about elevation 87.7. Water levels should be expected to show normal seasonal and annual fluctuations, and could be expected to vary with the level of the adjacent lake. RECOMMENDATIONS We understand that a 2-story house with a walk-out basement to the rear is planned for this lot. A proposed top-of-block grade on the assumed datum of about 106 is currently planned. The corresponding approximate footing grade in the areas of the respective borings has been plotted on the appropriate soil boring logs. No extensive depths of topsoils were encountered in the borings taken on the knob and also on the slope. However, inspection revealed that rather extensive depths of black organic materials could be anticipated %oti imfiti fCii 1