2008, 09-17 Permit 08001898 Engineer Ltrh a u'
civil engineering planning
landscape architecture surveying
510 East Third Avenue
Spokane, Washington 99202
509-242-1000 Fax: 509-242-1001
September 17, 2008
Mike Turbak
Senior Permit Specialist
11707 East Sprague Avenue, Ste. 106
Spokane Valley, Washington 99206
Re: Swift Dishman Mica Floodplain (2610 South Dishman Mica)
SE No: 08-274
Mike,
RECEIVED BY
CITY OF pf'(enlVALLEY
BY:
SEP 2 3 2000
On Tuesday September 9th, 2008 I spoke with Joe Plescia of CH2M Hill regarding the property located at 2610 South
Dishman Mica Road. We discussed the process and data requirements that will be necessary for evaluating the proposed
replacement of a mobile home and potential garage/shop construction. I have outlined the process discussed below, which
is partially based upon an e-mail you sent to me on September 5t"
1. The current effective model cross sections and flows will be obtained in paper format from Spokane County.
2. A model will be developed in HEC-RAS by manually entering the cross sections and flows into HEC-RAS to create
the duplicate effective model. This model will be limited to the general vicinity of the subject property.
3. A site visit will be necessary to verify the information and channel characteristics as assumed in the duplicate
effective model are valid.
4. Additional cross sections will be added at the upstream and downstream property lines in addition to at least one
representative cross section through the site where the improvements are to occur. The results of this model will
be used as the basis for comparison, IE the existing conditions model.
5. Modify the model to include the post -project improvements.
A topographic survey will be required for the subject property; however the entire floodplain will not need to be
resurveyed. With this method we will meet or exceed the level of detail of the original study.
Please review and pass along to Joe for his concurrence. It would be helpful for the applicant and the City to review and
concur to this proposed path of action.
Thank you,
STORHAUG ENGINEERING
14;kavt,
Erick Fitzpatrick
1