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Home My WebLink AboutPlans (3) "CROSSING AT BULL MOUNTAIN" LOT 89 HUB AND TACK CERTIFICATION '- } ' SE 1/4 SEC. 8, T 2 S. R 1 W, W.M. CITY OF TIGARD, WASHINGTON COUNTY, OREGON SURVEYED AUGUST 9, 2023 PREPARED FOR: ICHIJO USA c 1509 SW SUNSET BLVD. SUITE 2-D i PORTLAND. OR 97239 o rr " -- , EJ �q —f v"c l N89'S5'S3"E 42.00' o: i JCA-r—r- i 1 , io /1/L'5� �� '� ( Gb�i 1 It 18.63' 4 L mi 14.00' P co h p O d O rn co b 517' *-420' o LOT LOT - !� LOT O 88 r 89 0 90 u O L 6 2' 0 U O O o O z co 6 325.3.tY / 6.00' PUBLIC UTILITY a iv o EASEMENT c0 N o r 3 REGISTERED PROFESSIONAL a LAND SURVEYOR 589.55'53"W 42.00' rn oc U / Y SW HUNTWOOD STREET OREGON JULY 9, 2002 TRAVIS C. JANSEN ti,z G\______ 57751 o RENEWS: 6/30/2025 a I CERTIFY THAT I HAVE VERIFIED THE LOCATION OF THE SCALE 2 FOUNDATION UPON THE HEREIN DESCRIBED REAL PROPERTY 20 0 10 20 a AND THAT I FOUND THE IMPROVEMENTS AS SHOWN TO BE 11-11111-111t- UPON THE PREMISES AS HEREIN DESCRIBED, AND THEY DO 1 INCH = 20 FEET g NOT ENCROACH ON THE PROPERTIES ADJACENT THERETO. VDRAWN BY: MJL DATE:08/09/23 a T2 DATE:O8/09/23 PACIFIC COMMUNITY DESIGN REVIEWED BY: PLANNING - ENGINEERING - SURVEYING PROJECT NO.: 139-001 (503) 941-9484 ,� 1 "CROSSING AT BULL MOUNTAIN" LOT 90 HUB AND TACK CERTIFICATION SE 1/4 SEC. 8. _ 2 S. R 1 W, W.M. 4 CITY OF TIGARD, WASHINGTON COUNTY, OREGON SURVEYED AUGUST 9, 2023 PREPARED FOR: ICHIJO USA C 1509 SW SUNSET BLVD. SUITE 2-D o itl PORTLAND, OR 97239 L U E a 4 N89'55'53"E 42.00' O: co N O G. v 1 �- co\ f (o ,8.63• R 5.17'--- w 4.00' W W S N d b 3 o o a O O Q) 0) O 5.17'-y- - —+- - 4.20' O LOT --. LOT w LOT F.t 89 o v 90 0 91 V -4 o p O CD O a Z � M req 32.63' 6.00' ` PUBLIC c NN} UTILITY Q EASEMENT O co o_ o REGISTERED N _ __ . __ - '' PROFESSIONAL t LAND SURVEYOR 1 gi� S89'55'53"W 42.00' Ue..... L. r OREGON SW HUNTWOOD STREET a JULY 9, 2002 ,�. TRAVIS C. JANSEN L 57751 o RENEWS: 6/30/2025 I CERTIFY THAT I HAVE VERIFIED THE LOCATION OF THE SCALE 2 FOUNDATION UPON THE HEREIN DESCRIBED REAL PROPERTY 20 0 10 20 o AND THAT I FOUND THE IMPROVEMENTS AS SHOWN TO BE WIIIII i UPON THE PREMISES AS HEREIN DESCRIBED, AND THEY DO 1 INCH = 20 FEET 1 g NOT ENCROACH ON THE PROPERTIES ADJACENT THERETO. sr/ DRAWN BY: MJL DATE:08/09/23 PACIFIC COMMUNITY DESIGN a REVIEWED BY. T2 DATE:0$/09/23 PLANNING ENGINEERING SURVEYING Z PROJECT NO.: 139-001 (503) 941-9484 GEDPf1CIFIC j y, Real-World Geotechnical Solutions Investigation • Design •Construction Support August 3, 2023 Project No. 22-6162 A?5T 2_023 Ichijo USA Co., LTD /( Attn: Erik Gomez 1509 SW Sunset Blvd. Suite 2-D Portland, Oregon 97239 Via email to: erik.gomez anichijousa.com FOUNDATION SUBGRADE REVIEW LOT 89 RIVER TERRACE CROSSING AKA CROSSING AT BULL MOUNTAIN 15179 SW HUNTWOOD STREET TIGARD, OREGON This letter addresses the single-family home foundation subgrade on Lot 89 of the River Terrace Crossing development, also known as Crossing at Bull Mountain. We understand that the proposed building is a two-story home with a crawlspace. As part of this evaluation, GeoPacific visited the site on August 1, 2023. The excavation on lot 89 is sloped down very gently, at an average grade of about 5 percent or less, to the southwest. Benches are about 6 inches tall. The excavation is about 6 to 12 inches below surrounding grades. The exposed subgrade generally consisted of native silt and bedrock. Footing-to-slope and footing-to-wall setbacks did not appear to be an issue for the structure. There is an existing Lock+Load retaining wall along the northern property boundary, but the excavation is set back a sufficient distance and is shallow so that the retaining wall is not affected. Based on observed conditions, foundation subgrades as prepared are considered suitable to support the planned allowable bearing pressure of 1,500 psf. Estimated settlement under the allowable bearing pressure is 1-inch total, and 3/4 inch differential, measured over a horizontal distance of 20 feet. Care should be taken to avoid saturation or disturbance of footing subgrade soils during and after excavation. If footing bearing soils become saturated or disturbed, any softened soil or slough should be removed and replaced with crushed aggregate or additional concrete. In general, footing excavations should be cleaned such that no more than approximately ''/2-inch of loose soils are present prior to pouring concrete. Also, crushed rock placed over the surface of the subgrade should be compacted so that no more than approximately '/-inch of loose gravel is present prior to pouring concrete. Construction should include typical measures for controlling subsurface water beneath the homes, including positive crawlspace drainage to an adequate low-point drain exiting the foundation, visqueen covering the exposed ground in the crawlspace, and crawlspace ventilation (foundation vents). The homebuyers should be informed and educated that some slow flowing water in the • 14835 SW 72"d Avenue Tel (503)598-8445 ` Portland, Oregon 97224 Fax(503)941-9281 GeoPacific Engineering, Inc. Job No.22-6162 Lot 89 River Terrace Crossing crawlspaces is considered normal and not necessarily detrimental to the home given these other design elements incorporated into its construction. Adequate crawlspace drainage is not something that geotechnical consultants can verify; the purpose of our visit is for observations of foundation bearing conditions only. Appropriate design professionals should be consulted regarding crawlspace ventilation, building material selection and mold prevention issues, which are outside GeoPacific's area of expertise. We have prepared this report for Ichijo USA, and it should not be relied upon by third parties without consulting GeoPacific. Within the limitations of scope, schedule and budget, GeoPacific attempted to execute these services in accordance with generally accepted professional principles and practices in the fields of geotechnical engineering and engineering geology at the time the report was prepared. The conclusions and interpretations presented in this report should not be construed as a warranty of the subsurface conditions. No warranty, expressed or implied, is made. The scope of our work did not include flood hazard evaluations, environmental assessments, the presence or absence of wetlands; or potential hazardous substances in the soil, surface water, or groundwater at this site. We appreciate this opportunity to be of service. Sincerely, GEOPACIFIC ENGINEERING, INC. I '7{ I f 9ui . .f E 4 t21131/23 Benjamin G. Anderson, P.E. Associate Engineer • -, .