From: Jennifer Cline
Sent: Tue Oct 28 12:36:39 2014
To: Dan Huff
Cc: Garrett Edmunds; Keith Stiglbauer
Subject: FW: Water Treatment Plant Operations
Importance: Normal
Dan, Not sure if I sent this to you already. This is the work we understood Curt was providing to us.
· Contact Jay Kittams, the adjacent property owner a provide him information regarding the general permit allowances for discharge to surface waters of the state.
· Provide a drawing of the a retrofit design for the east backwash pond too reduce or slow down the amount of water draining across Mr. Kittams property. Our concern is the design of the outflow must be above the minimum discharge rate to the pond to prevent any backflow or overflow issues. We do not have a means to verify this with his suggested design below.
I will attempt to contact Curt today with our concerns.
Jenn
-----Original Message-----
From: Keith Stiglbauer [mailto:kstiglbauer@cityofmolalla.com]
Sent: Thursday, October 23, 2014 8:59 AM
To: Jennifer Cline
Subject: Fwd: Water Treatment Plant Operations
----- Forwarded Message -----
From: "cjm" <cjm@curran-mcleod.com>
To: "Keith Stiglbauer" <kstiglbauer@cityofmolalla.com>
Sent: Wednesday, October 22, 2014 10:22:23 PM
Subject: RE: Water Treatment Plant Operations
Hi Keith,
I have not talked with Jay Kittams. Is that the correct name of the adjoining property owner?
The City of Molalla does not have a specific permit for the discharge of the backwash water from the ponds, but rather, the discharge of backwash water is permitted under a general permit. This discharge to the adjoining drainageway does not establish a trespass claim by the adjoining property owner due to the presence of the natural drainageway and that all surface waters are classified as "waters of the state" under ORS 468 B.
All water treatment facility backwash falls under the Nationwide NPDES Permit 200 J. The City should, however, review the requirements of a 200J nationwide permit for backwash waters discharging to surface waters of the state at the following websites:
http://www.deq.state.or.us/wq/wqpermit/docs/general/npdes200j/permit.pdf
http://www.epa.gov/npdes/pubs/form_1.pdf
Regarding the flow control from the backwash pond, your discharge for the west pond does exactly what you should desire. The east pond could be retrofitted with a single vertical pipe discharge, with holes allowing discharge, and the top of the vertical pipe providing an overflow. This vertical pipe should be relatively large, i.e., 10" or 12" with multiple 1" or 1 1/2" holes, and extend vertically from the existing outlet pipe elevation to the high water level. This will function independently of and should be supported by the existing overflow weir structure. Obviously there will be no discharge until the water level exceeds the weir elevation, but flow would be throttled above that elevation. This pond will function as a retainage pond and because of the resident volume of water, should provide better settling characteristics than the west pond.
************************************
Curt McLeod P.E.
CURRAN-McLEOD, INC.
6655 S.W. Hampton Street, Suite 210
Portland, Oregon 97223
T: (503) 684-3478
F: (503) 624-8247
C: (503) 475-0431
email: cjm@curran-mcleod.com
-----Original Message-----
From: Keith Stiglbauer [mailto:kstiglbauer@cityofmolalla.com]
Sent: Tuesday, October 21, 2014 11:29 AM
Cc: Jennifer Cline
Subject:
Hello Kurt
I was wondering if you talked to Mr. Kittams about the drainage issue. And where we stand with the flow restrictor for the backwash ponds? Thanks Keith City Of Molalla Water Department.