Correspondence (9) Nov 23 09 01:25p CIVIL CONSTRUCTION 5412986980 p.2
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GENERAL CONTRACTOR CIVIL 1840 WEsT 16-TM STREET
541- 298 -6025 THE DALLES. OR 97058
541 -29II -6980 Ex CONSTRUCTION CCL # 63613
Cowy, INC. I
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July 14, 2010 , �`C� A��
Zen Dutson C''
of
City of Tigard
13125 SW Hall Blvd 2ao CCU
Tigard, OR 97223
RE: Fanno Creek Boardwalk
Pile Driving Procedure
To Whom It May Concern:
As requested,. we submit the following procedure to drive the piling for the
boardwalk;
1. The boardwalk is supported by 2ea 3" galv. pipe piling at 8' centers.
2. Each pile has a design load of 50001b, including dead load and 1001b/sf live
load.
3. The piling were driven to 10,000lb or 5 ton capacity.
4. A hydraulic jack with a pressure gauge was used to determine the actual
load. 4331 psi equated to 10,000lb of load.
5. The pile were driven and tested acceptably, meeting the design
requirements.
6. As time goes on, the pile will set or freeze and the pile resistance will
increase significantly.
This procedure was performed and witnessed by Zen Dutsen, Jeff Peck /City of
Tigard, Vello, VAK Engineering, and Paul and Nick of Civil Construction.
Everyone in attendance was satisfied with the acceptable results.
Since -ly,
ela ;
:ulC.Wolf
->uFZr -65 -(:)
13v? 00 6
VAK Construction Engineering Services, LLC
8285 SW Nimbus Avenue, Suite 104
.VA K Beaverton, Oregon 97008
503.718.5999 tel 503.718.5980 fax
,..‘ vkoiv@vakengineerinq.com
M E M
TO: Paul Wolf, Civil Construction Company Fax:
FROM: Vello Koiv, VAK Engineering
PROJECT: Fanno Creek Trail & Bridge /Hall Blvd. DATE: 12/16/2009
Crossing
RE: Boardwalk Design, Conditions of Approval No. 1, Land Use Hearing
I was made aware that a condition of approval for the Boardwalk Design was that it be designed to be
resistant to flood damage and anchored to prevent floatation, collapse and lateral movement.
We were not aware of this condition at the time of our design effort; however we did conduct our design
with the realization and understanding that the above conditions could be present. The boardwalk
members are positively attached with brackets and nails to driven piles that have uplift resistance to
prevent floatation. Appropriate design loads were used to size the members adequately. Lateral loads
were also considered in designing the foundation supports to resist movement.
It also should be noted that the boardwalk extends from the bridge crossing the creek to a pathway near
the edge of Hall Boulevard. As such, it is not in or near the main channel of Fanno Creek. Should
flooding occur, flood waters will have little or no movement around the boardwalk.
' In summary, it is my position that the directive of Condition 1 has been met.
Please advise should there be any further requirements with regards to this matter.
Thanks.
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