Correspondence (9) Ov2.04'1
. VAK Construction Engineering Services, LLC •
( 8285 SW Nimbus Avenue, Suite 104
Beaverton, Oregon 97008
503.718.5999 tel 503.718.5980 fax
vkoiv(9vakengineerinq.com
OVA
0
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
1 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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