Report 01/11/05 TUE 17:31 FAX 503 684 0954 CARLSON TESTING Z002
•
Main Office delete Office Bend Office
P.O. Box 23814 4060 Hudson Ave., NE P.O. Box 7918 em, OR 97301 Carlson Testing, Inc. Phone (03)) 68 0 Phone (5 3) 589 -1252 Phone Bend, 3 30- -9155
�11t FAX (503) 6840954 FAX (503) 589 -1309 FAX (541) 330 -9163
Special Inspection
FINAL SUMMARY LETTER
January 11, 2005
T0406884.AB /C /D /E/F
City of Tigard
13125 SW Hall Blvd.,
Tigard, OR 97223 -8199
Attn: Building Department
Re: Hawks Beard Townhomes -
Lot #17: 10920 SW Briarwood Place, Tigard OR - Permit #: MST2003 -00318
Lot #18: 10930 SW Briarwood Place, Tigard OR - Permit #: MST2003 -00319
Lot #19: 10940 SW Briarwood Place, Tigard OR - Permit #: MST2003 -00320
Lot #20: 10950 SW Briarwood Place, Tigard OR - Permit #: MST2003-00321 �-
Lot #21: 10960 SW Briarwood Place, Tigard OR - Permit #: MST2003 -00322
Lot #22: 10970 SW Briarwood Place, Tigard OR - Permit #: MST2003 -00323
Dear Sir or Madam:
This is to certify that in accordance with Section 1701 of the Uniform Building Code, Title 24, we have
performed special inspection of the following item(s) per our inspection reports only:
Installation of Adhesive Anchors
All inspections and tests were performed and reported according to the requirements of Project Documents
and, to the best of our knowledge, the work was in conformance with the approved plans and
specifications, approved change orders and applicable workmanship provisions of the State Building Code
and Standards, as well as the structural engineer's design changes, approvals and verbal instructions.
Our reports pertain to the material tested /inspected only. Information contained herein is not to be
reproduced, except in full, without prior authorization from this office.
If there are any further questions regarding this matter, please do not hesitate to contact this office.
Respe • ully submi d,
CARL',O TESTIN , I
D. . . a each
Chief ecutive Officer
mbw
cc: Derek L Brown & Associates Inc — Bruce Cone Froelich Consulting Engineers — Todd Nagle
Mentrum Architecture — Bayard Mentrum
•
Olga slam Office eed Office
Carlson Geotechnical P.Men Office 40t�0 FAs1�Bend,
P.O. Box 7919
A Ave., A G
NE P � 971 Salem, Dbotston at Carlson Tesdng. Inc. Phone , (8480 84 80 Phone (503) 569'125E Phone (541) 3504
Geotechnical Consulting
Construction Inspection and Related Tests FAX (503) 6709147 FAX (503) 589.1309 FAX (541) 3309163
Final Summary Letter
September 10, 2003 - revised November 19„ 2003
Mr. Mark Hansen
Derek L. Brown & Associates, Inc.
9500 SW Barbur Blvd., Suite 220
Portland, Oregon 97219
Re: . Final Letter of Geotechnical Observations
Hawks Beard Toainhomes
SW Hawks Beard Street
Tigard, Oregon
. CGT Project G0202050A
Carlson Geotechnical (COT) served as geotechnical Engineer -of- Record (EOR) for the Hawks
Beard Townhomes project, located at the intersection of SW 130"' Avenue and SW Hawks Beard
Street in Tigard, Oregon. We performed a geotechnical investigation of the site, the results of
which were presented in our report of Geotechnical Engineering Services dated December 10,
2002, and performed geotechnical observation during construction. Our observations were
completed on an on -cap, part -time basis between the dates of November 19, 2002 and July 17,
2003.
• Site Stripping: Prior to construction, the site contained surface vegetation in
structural areas. Roadways and lots were stripped of vegetation between
November 19 and 25", 2002. Based on our field observations, the site was
stripped of organic topsoil in general accordance with our recommendations.
• Subgrade Conditions: After stripping had been completed, the site subgrade soil
was cement treated for planned construction activities in the winter. Based on our
field observations, the subgrade soil has been prepared in general accordance with
our recommendations.
• Roadway Fill Placement and Compaction: Up to 2 feet of fill was placed and
compacted on roadways in the southeast corner of the site. CGT conducted 6 in-
place relative compaction tests on the native brown silt fill. Based on our field
observations and in place density testing the native silt fill for roadways was placed
and compacted in general accordance with our recommendations (92 percent of
ASTM D- 1557).
• Roadway Aggregate Base Rock: CGT conducted 12 In -place relative compaction
tests on the roadway aggregate base rock on May 2, 2003. The roadway
aggregate base rode was prepared in general accordance with the
recommendations given by the City of Tigard (95 percent of AASHTO T -99).
Hawks Beard Townhornes
Tigard, Oregon
September 10, 2003
• Roadway Pavements: Asphalt was placed on the South Alley, North Alley,
Hazelwood, Briarwood, Woodridge, Huntington, and Hawks Beard on May 13,
2003. CGT conducted 17 in -place relative compaction tests on the asphalt. Test
results ranged from 91 to 93.1 percent of ASTM D - 2950.
• Lots: Based on our field observations, lots 8 through 13, and lots 1 through 3 were
cut and are on native silt The remaining 53 lots are on structural fill up to 3 feet
deep. Based on our observations and in-place relative compaction testing, lots 1
through 62 have been prepared in general accordance with our recommendations.
• Foundation Bearing Surfaces: Foundation bearing surfaces were not prepared
at the time of this report therefore, we have not observed any of the foundation
subgrade soils for the proposed residences. eerT the
pouring We understand that the City of Tigard will not require individual
lot foundation subgrade observations.
• Utility trench backfi l compaction. COT conducted 28 in -place relative
compaction tests on utility trench baddill material for the sanitary sewer and storm
sewer trenches. Based on our density testing, the utility trenches backfill has been
compacted in general accordance with the recommendations given by City of
Tigard (95 percent of AASHTO T -99).
Based on our observations, as documented in our field reports, and to the best or our knowledge,
within our scope of work, the above geotechnical summaries accurately reflect our observations.
Our services were provided on an on -call basis, in which we relied on the contractor to contact our
office for the scheduling of our services. We cannot be held contractually responsible for those
items, if any, that we did not observe or test.
Sincerely,
CARLSON GEOTECHNICAL
3 eied 01C— /� G 1 Af e
Jared Z i ` -
Geotechnicaf Staff - -115P�!! •
anne M ' - , P.E. Pn ipal eote = nical Engineer
•
• ID: PIG OTECI PROJECTSs2002 ProjectsiHawks Beard Townhames - COSsFInal Leuer.DOC
Carlson Geotedmical Page 2 of 2