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Final Report 18140 84th St SW_JACOBSON.pdfGG THE GALLi GROUP Geotechnical Consulting August 28, 2015 TGG Project 1810-3 City of Edmonds Development Services Department 121 5th Ave N Edmonds, WA 98020 Subject: Final Letter for Special Inspections 18140 84th St SW Edmonds, Washington 98026 BLD20140204 Attention: Patrick Lawler This letter is to certify that the special inspections for the above project have been completed and the project work is done. The work was completed in conformance with the approved plans. The following tasks were part of our special inspections: • Temporary Erosion and Sediment Control The contractor installed a silt fence on the downhill side of the activity area. Work was completed during the drier season. • Drainage Installation for Wall The contractor installed back of wall drainage behind the blocks and connected to existing drainage system that routes water to the toe of the slope. • Redirection of Drainage for Existing Impervious Surfaces Existing downspout lines disturbed during construction were directed westward to existing collection system that routes water to the toe of the slope • Permanent Erosion and Sediment Control The contractor negotiated with the homeowner to complete the final erosion control. We requested that the soil below the wall be amended with mulch, topcoated with mulch, and then planted. That work has been completed as of 8-27-2015. PO Box 30759, Seattle, WA 98113 206-525-5097 Final Special Inspection Letter 18140 84th St. SW BLD20140204 August 28, 2015 All grading and construction was complete as of 8-27-2015. I have attached copies of our field reports for the wall installation which were previously emailed to Patrick Lawler, but are include here for ease of review. Sincerely, THE GALLI GROUP Paul L. Stoltenberg, P.E. Senior Geotechnical Engineer Attached: Field Reports Final Report 18140 84th St SW JACOBSON 2 The Galll Group 1HI GAul am Geotechni"I Consulting DAILY FIELD REPORT PROJECT rnn Wrl BUILDING PERMIT PERMIT OR JOB NO. f34Q —DATE FEELD REPRESENTATIVE CLiENTIOWNER CONTRACTOR CONSTRUCTION OPERATIONS OBSERVATION NOTES: refa ' r � 1�%i- L ✓ t _ . - - BY White - Job File, Yellow - Contractor, Pink - Client MGm Rill CROUP GeofechnicaI Consulting DAILY FIELD REPORT PROJECT i S JOB NO. — f� (4� BUELDING PERMIT OR JOB NO. 22 1125.(q 0 00 _ _ DATE � - S ` t S FIELD REPRESENTATIVE CLEMOWNER CONTRACTOR r CONSTRUCTION OPERMONS ZjL F ,:::; OBSERVATION NOTES: �w_ C-UT4:*� 1 z1v Z a -.11 u r C /_ c.i u E .Q OgL1� 7 Zb io �-- 1e { 7 iCT i CC: BY White - Job File, Yellow - Contractor, Pink - Client THE GALLI GROUP Gcoteckinical Consulting Site Address: TGG Representative: Contractor: Owner: Pile No. Depth P1 18.5 •------- ----------r------------ P2 ; 19 ' 185 P4 21.5 ------------------r------- P5 ------------------------------ Z P6 1 19 P8 18 -------------------r`------- ------• ------- Pg-------t--------� $------- P10 17.5 P1117 P12 ; 17.5 ------- P13 16 -----4 ------ ---------- P14 17 P15 i 15.5 -------- ---------------------------- P16 15 ------------------t------------------- P17 ; 16 ------ P 18 __----r------ 6------- .------------------4_--__________--_--- .------------------L_--________--___--- AL Daily Field Report Pin Pile Installation Permit #BLD20140204 18140 84th Ave W Date: 4/8/15 - 4/9/15 Paul Staltenberg, P_E Hammer: 140 lb Rhino ------------------ ------McDowell Pile Kin Refusal: ------------ 60 see/inch - __--- Jacobson -------------- Pile Type: 2" Schad 80 G Pile No. Depth Pile No. Depth -------------------------------------- -------------- ------------------- Y------------ -------------------- -----------------• ------------------ -------------------------------- -- Phone: 206-525-5W 1810 Pin Pile Summary_.lacobson 04142014 PO Box 30759, Seattle, WA 98113 Fax: 206-525-5091 rl y lZ f:- . IT ZL AL yp �=--��' EX HOUSE - �:-=��-`�-=-= -=�' HELICAL ANCHORS Pam ® 6'—O" OC, TYP r 81 Jlt �6s _ + F007iNG DRAIN PER DETAIL 3/53.1 TV 'P7' 164 ROTECT EX VIDE ''8 MAPLE ROOT Pit TOW = 164.0 L , STORM DRAIN SE OF SLOPE 1/0 ssMH • — RIM=162.85' 3 �f \ , IGO] TIE Ai,LI GROUP (ieotechnical Consulting Daily Field Report Helical Anchor Installation Permit#20140204 Site Address: 18140 84th Avenue W, Edmonds Date: 4-10 to 4-14-2015 TGG Representative: Paul Stoltenberg, P.E Anchor: 8-10-12 Helical Anchor Contractor: McDowell NW Pile Kin g _ ___________________ Design Load: _ - - 8 kips �9500_rev) Owner: Jacobson Conversion: 10x1.5xpsi=Ibs _______ Anchor No. Design Load Gauge (psi) Correlation L (ft) Kip/psi Final Load Al I 8,000 2000 I 30000 - -----� - - ---_-- 0 22--------� �- +------------------ - ----8^000 2000-----_----_-10-------- 22 1.5 '-----30000 - ----------------- 1 O 22-------- i ------•--- -------- ----�---------►-------------+------30000 ------ _------A4 -- ---- , 000 -----------2000 I ----------------- ------ a _8_000 _ 2000_____ 10 22 --- I 30000 ------- A5------------ 8,000 ----- 2000 I 30000 •--------------------------1-0-------- 22--------� 5-------i-------------------- __-- 8,000 2000 1022 -- - 1.5 i -- 30000 ------- A6-------,- 8,000-----------2000----- ----10 22 1--------�- ------ A7-------+ ------------------------------------------------ 30000 ------A$8,000 ___-- 2300 -- 1 10 27 1.5 34500 -------------------------------------- ` 8,000 1500 - ---10 - ----- 22 1.5 I _ 22500 -------A10------t--=--8,000----_..____--2500------�•-----------------------------------i---- - -- -- - - 1Q-- 22 1.5 37500---- ___-- 8,000 1250------1018750 __----_ 40 1.5 I I I 1 , •------------------------------------- •----------------� r------------------------------------' NOTES: *All anchors consisted of 8"-10"-12' triple helix lead section 7 feet long except anchor A-11 which was installed first. Anchor A-11 consisted of 5-ft lead section with 6"-8" double helix installed at 20 degrees per plan. In order to save material costs the geotechnical engineer recommended steepening the angle from 20 degrees to 40 degrees. Contractor recommended switching to triple helix and geotechnical engineer approved. Consulted with structural engineer (CG Engineering) who confirmed that piles had extra capacity for additional vertical load and that the design working load for the anchors was only 8 kips. Structural engineer approved the field change and after anchor A-11 (first anchor installed) was installed the contractor switched to the steeper anchor with triple helices. The result was anchors achieving the minimum req'd depth (15 feet) and testing out at more than 200% of the design working load. The Galli Group load tested anchors A-11 and A-9 in the field against the earth embankment and concluded that the anchors achieved at least 200 percent of the design load without creep of the anchor. Testing was conducted with 60-ton ram and power team. Load testing confirmed that the assumed correlation factor from torque (psi) to axial load was appropriate for the anchors in these soil conditions. Numbering scheme for anchors coforms to that shown on project plans. Phone:206-525-5097 1810_Anchor Field Report Summary 04142015 - PO Box 30759, Seattle, WA 98113 Fax: 206-525-5091 ----- -- _L--� - ~ ---- ---- 4Ly yp `�--- EX HOUSE -�_____=________ -=-------- / HELICAL ANCHORS --___ ---_� --- -__ -_ -- 0 6'-0' OC, TYP _---- s-------- / FOOTING DRAIN PER _ DETAIL 3/S3.1 ' ... 1P4 � • �'�` -- __ - _ a a �� e r . �,��-mil TT 164, ROTECT EX VINE MAPLE ROOT TOW - 164.0' �/,/ ]jam V:r �..\�` t ;ram' •` _J � \ �. \ \ \.� \ •:�•5 STORK �+GIR/A�IN SE OF SLOPE s \ rr• o ssm RIM=162.85' 3 . \ r 4s . tl 's f � 1 MGlmhu gm Gulechnical Cansuliing DAILY FIELD REPORT PROJECT &I 1 y G�i JOB NO. BUILDING PERmrr OR JOB NO. _ 6 itl <2 Z,,2 el DATE &F — ( Z " ZE FIELD REPRESENTATIVE CLEENT/OWNER CONTRACTOR CONSTRUCTION OPERATIONS G OBSERVATION NOTES: CC: 6 BY Sri toy_ \—'\ TO White • .Job File. Yellow - Contractor. Pink - Client