Molalla TFG Retail - Storm and Street Questions

From: Scott Franklin

Sent: Thu Oct 19 16:49:42 2017

To: Gerald Fisher

Subject: Molalla TFG Retail - Storm and Street Questions

Importance: Normal

Gerald –

I know you’re out of the office until 10/20, and might not be able to respond until your return, but I’m trying to locate a couple of things in the new Construction Standards, and am not having much success – hopefully, you can point me in the right direction:

* In my pre-app notes from last June, I wrote down that we are to assume a pre-historic condition for our pre-development hydrologic condition for our site (i.e. – use “prairie” condition). However, I’m not finding that in the new Construction and Design Standards. I’m just seeing reference to extg conditions for pre-development, and not prehistoric condition. Can you point me in the right direction for this requirement? The answer obviously has a big impact on the detention storage for the site, as it’s currently mostly gravel, and we’re trying to get an idea of what the storm detention costs would be.
* Street structural section – I see that the street design standards list a minimum pavement section for the roads (noting that the structural section design must be based on a geotechnical investigation), but I don’t see a minimum aggregate section in the standards? Is there a minimum aggregate section, or am I just not seeing it? We talked a little about the structural section last week, but I was thinking I would find a minimum section in the new standards, and am not finding it.

Thanks for your help!

Thanks,

Scott Franklin, P.E., P.L.S.**

**P.E. (OR, CO); P.L.S. (OR)

PACLAND

Engineering & Development Consulting Services

10135 S.E. Sunnyside Road, Suite 200 | Clackamas, OR 97015

Office: (503) 659-9500 x1311 | Fax: (503) 659-2227

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