HomeMy WebLinkAbout909 CENTRE AVE - SPECIAL INSPECTIONS - 9/29/2005September 29, 2005
Columbine Health Systems
947 Worthington Circle
Fort Collins, Colorado 80526
Attn: Mr. Roy Malaske
Re: Construction Materials Compliance Summary
The Winslow Garage E
909 Centre Avenue
Fort Collins, Colorado
Terracon Project No. 20041066
Dear Mr. Malaske:
Soils/Earthwork
Irerracon
Consulting Engineers & Scientists
Terracon Consultants, Inc.
301 North Howes
Fort Collins, Colorado 80521
Phone 970.484.0359
Fax 970.484.0454
www.terracon.com
At the request of Drahota personnel, we reviewed the results of .the earthwork materials placed
and monitored in the building foundation areas. Terracon provided the services on an "as
requested" basis. Our services on the project site have included performing laboratory testing
of the soils for suitability to the project specifications and the Geotechnical Engineering Report
recommendations (Project No. 20035096; dated June 13, 2003) performed by Terracon.
Terracon also performed in -place field density testing during the foundation backfill placement
to check maximum density and moisture control.
As recommended in the soils investigation, at least 3-feet of controlled fill material shall be
placed below all footings. Based upon observations and laboratory testing, on -site or approved
imported soils were suitable for placement during construction. Laboratory tests indicated
backfill material observed by Terracon met the recommendations as outlined in the
geotechnical report. The results of the field and laboratory testing were forwarded for review.
In addition, the on -site superintendent and subcontractors were informed on a daily basis of the
test results performed.
Terracon performed 19 in -place density/compaction tests for the building foundation backfill
during construction. The tests were performed on an as requested basis by Drahota. The tests
at the locations performed, indicated that the compaction and water (moisture) content
recommended in the geotechnical report recommendations were met at the time of testing, or
upon performing retests. Based upon the limited tests and observations performed, results
indicate suitable materials and specified compaction at the locations tested.
Our test results represent only the materials at the location and time of testing. Terracon did
not direct nor control the fill placement and compaction at the site and does not assume
responsibility for the placement, compaction or control of the fill materials. Areas of fill which
are not representative of our testing may exist, particularly in common fill areas such as slopes
or landscaped outside of proposed construction. The foundation type and specific design for
each structure will be recommended based on the particular characteristics of the soil type at
foundation depth, and on the basis of further evaluations and observations prior to construction.
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The Winslow
Garage E Compliance Summary
Project No. 20041066
Page 2
Concrete
lferracon
The Portland cement concrete placed and tested on -site consisted of 2 tests for physical
property and compressive strength tests for the foundation footings, walls and slab -on -grade.
The reports indicate the specified minimum compressive strength requirements as reported by
Drahota for the project have been achieved.
Reinforcing Steel
Terracon provided reinforcing steel placement observation in structural concrete placements as
requested. The observations performed were observed to be in compliance per the provided
plans and specifications for the project and have been formally reported to the client and
designated parties. It is recommended that the project structural engineer review the test
reports for acceptance as meeting the project criteria.
Foundation
Terracon provided observation of the foundation spread footing foundation(s) excavations as
requested during construction. A summary of the observations and recommendations were
provided in written reports upon completion. Per Terracon's geotechnical report and
observations performed, spread footings that Terracon observed have been placed in general
accordance with the plans and specifications and were placed on the anticipated bearing
material identified in our geotechnical report.
This report has been prepared for the exclusive use of providing test data and observations to
document portions of the earthwork, concrete and foundation construction operations
conducted for the proposed project. The opinions and conclusions presented have been
derived in accordance with generally accepted geotechnical and material engineering practice.
No other warranty expressed or implied is made. In the event that there are any changes in the
nature or design of the project, the conclusions contained in this report shall not be considered
valid unless this firm reviews such changes, and the conclusions of this report are modified or
verified in writing.
This letter is prepared for the exclusive use and reliance of our client. Use or reliance by any
other party is prohibited without the written authorization of our client and Terracon.
Reliance on this letter by the client and all authorized parties will be subject to the terms,
conditions and limitations stated in the proposal, report and Terracon's Terms and Conditions.
The limitation of liability defined in the Terms and Conditions is the aggregate limit of Terracon's
liability to the client and all relying parties.
The Winslow
Garage E Compliance Summary
Project No. 20041066
Page 3
1rerracon
It has been our pleasure to work with you on this project and to continue providing services
during your ongoing construction. Should you have any questions, or need additional
information, please contact us at your convenience.
Respectfully submitted,
1rerracon
y6:
^ Q^r rf0f,
Mike L. Walker, CET David A.
Manager of Construction Services Geotechnical` ineer/D Manager
Enc/Copies to: (1) Addressee
(1) Drahota
(1) City of Fort Collins Building Dept. via Drahota
(1) Vaught -Frye Architects
MLW/DAR