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HomeMy WebLinkAboutPermit Field Test & Inspection Report 2007-5-15 Jun. ~~, ~UUI 1:21PM No. 1861 P 2/16 ~.\ !.!.... c3 K & A Engineering, Inc, 3327 Roanoke Ave" Eugene, OR 97408 (541) 684-9399 Voice (541) 684-9358 FAX engineering . May 15, 2007 Hayden Enterprises, Inc, 2464 SW Glacier Drive #110 RedmOnd, OR 97756 ( b3~ Project: 151.06 t r./ 0155iti/(2,IV . 7"?t4~ Subject: Jasper Meadows subdivision--Lot 211 Springfield, OR Foundation Soils PURPOSE AND SCOPE At your request, K & A Engineering, Inc, has completed a geotechnical investigation of the existing soils on the SUbject property. Our understanding is that a wood-framed single-family residence supported by a cast-in- 'place concrete spread footing foundation is proposed for construction on this sne, The purpose of our investigation was to detennine the suitability of the soils for construction of the proposed structure, and provide recommendations for construction of the foundation. The scope of our services is limited . to general suitability with respect to bearing capacity and expansive soilS. FOUNDATION PAD PREPARATION The project sne is located on a residential lot in the new "Jasper Meadows" subdivision, The lot is mostly level and there are no apparent slope movement hazards. Foundation prepatation involved constructing a level foundation pad on native undisturbed soils, This required excavating and removing1PoroximatelyJ2.to 2~:inches.otloQseJJrganic,silt.andundocumentedjULfrom.tho foundation pad area. Aflerthe excavation and removal of these soils, approximately 12-inches of "/.-inch minus dense graded crushed aggregate was plaCed and compacted over 3,0 to 5,O-feet of 8-inch minus "pit run' fill. This served to provide a uniform surface for footing construction, The fill materials were placed and then compacted using a vibratory steel drum roller We tested the in-place density of the crushed aggregate fill and have determined that the average dry density exceeds 95% of maximum as determined by ASTM D698, The field test results are attached to this report, Jun,ll, lUUI 1 :lIPM No. 1861 P 3/16 ~---. ."-' K & A Engineering, Inc. SUMMARY AND RECDMMENDATIONS The project site, as prepared, is suitable to support the proposed foundations, We recommend a design allowable bearing capacity of 2,500-pounds per square foot The soils present a moderate shrinlqswell hazard. Foundation loads should bear on undisturbed native silts a minimum depth of 36-inches below final grade around the perimefer foundation, The prepared foundation pad meets these recommendations. Final grading around the foundation pad should raise the grade above the foundation using native or imported silts and should slope away from the foundation, We recommend approval of the foundation pad, as constructed, by the building official, Thank you for the opportunity to be of serVice, Please call us if you have questions or need further assistance, Respectfully, Steve Schultz, E.I. T. K & A Engineering, Inc, WIRES Client: Hayden Enterprises Jasper Meadows-Lot 211, Springfield, OR Project: 151.06 ~age 2 of 2 June 21 , 2007 Jun.22 2007 121PM No.1861 p, 4/16 ..~..L ...a. Density of Soil and Soil-Aggregates In-Place ASTM D2922 and D3017 I Proiect: 151.06 1 Site Address: Jasper MeadowsnLot 211 I Permit No: 1 Date: 5/16/2007 1 oensityTeSlTyee': 01.6 I Operator: SS I Material 1ype:13/4" (-) trom Springfield Quany I Maximum Dry DenslIy, pCfl1280 'Standardization and ReferencB Chec~d. Density (Standard Deviationsll (S,D,) 1,65 1.1 Moisture, I (S,D:) 1.49 . Moist' Drv Density, Density, Waler Compaction, Test No, pcf pcl Content, % % 1 137,6 129.3 6.4 I 101.0% I 2 139.8 1298 7.7 I 101.4% I 3 136.7 130,3 4.9 I 101,8% 1 I I I I I I 1 1 I 1 1 I I I I i 1 I I I 1 I I I 1 I I I , I I I I 1 I L _. .-'-1 I I -I 1 I I I I I I I 1 I I I Average: 101.4% SId, Oev.: 0,39% Remarks 1 , -.'_.-1_...'. 1 Direct Transmission (OT) (specify depth, in,) or Air Gap Backscatter (AGB) (specitiy(T)ouchable or (U)nlouchable mode T esl perlormed using Seaman Nuclear Corp model C-300, SN 21113 Client: Hayden Enterprises, Inc. Project: 151.06 K & A Engineering, Inc, 6/21/2007