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City of Lake Oswego
Willamette River railroad bridge

Public Works Standard Details

The following index lists the City's Standard Details, hereinafter "Details," for construction of public improvements. The Details can be accessed individually for review or downloading by clicking on the detail number.  They are available in AutoCAD, JPG, and Adobe Acrobat.

These Details are intended for use by design professionals for the design and construction of public improvements required to provide service to private development but which are owned and maintained by the City of Lake Oswego. They should also be used for the design and construction of privately owned and maintained facilities to be located in City owned rights-of-way and/or to be connected to City owned facilities.

It is expected that changes in technology, materials of construction, and contractors' means and methods will require periodic revision of these Details. However, modification of these Details without express approval by the City Engineer is prohibited. Your assistance in reporting any errors and providing suggestions for additions, deletions or revisions to maintain these Details is welcomed and appreciated. Inquiries regarding current or imminent revisions, suggestions, and reports of errors or omissions should be directed to the City Engineer.

We try to update these details on a regular basis, however, we do not guarantee that the most recent version will be published on this site.  To guarantee that the most up-to-date version is available on this web site, please contact the Engineering Department at 503-635-0270 or email. 

  • E - Erosion Control
  • S - Street
  • SD - Storm
  • W - Water
  • WW - Wastewater
Numbersort icon Title Revision Download
SD5-02A

Oversize Gutter and Curb Inlet Catch Basin (CG-2)

08/26/2012
SD5-02B

Oversize Catch Basin Frame (CWS Drawing No. 170-ST)

06/14/2012
SD5-02C

Oversize Catch Basin Grate (CWS Drawing No 170-ST)

07/26/2012
SD5-03A

Type "G" Catch Basin

08/21/2012
SD5-03B

Type "G" Catch Basin Frame & Grate

08/22/2012
SD5-04

Pollution Control Box

08/22/2012
SD6-01A

Standard Ditch Inlet

08/15/2012
SD6-01B

Slanted Frame & Grate for Ditch Inlet

08/16/2012
SD6-01C

Box Frame & Grate for Ditch Inlet

08/16/2012
SD6-01D

Standard Ditch Inlet w/Snout & Bio-Skirt

08/17/2012
SD7-01

Standard Roof Drain Outlet Box for Mountable Curb

06/14/2012
SD8-01

Typical Closed Detention Pipe

07/18/2012
SD8-02

Typical Parking Lot Detention Facility

08/23/2012
W1-01A

1" Water Service Assembly

03/11/2013
W1-01B

Typical Water Service Connection Detail 1 1/2" to 2"

02/20/2013
W1-01C

Typical (1 1/2" to 2") Schedule 80 Water Service Connection Detail

02/21/2013
W1-01D

Typical Water Service Connection Detail 3" and 4"

02/25/2013
W1-02

Typical Fire Sprinkling Service Line

02/25/2013
W2-01

Typical 2" Blow-Off Assembly

02/25/2013
W3-01A

Air Valve Assembly Detail

02/25/2013
W3-01B

Standpipe Detail

03/22/2013
W4-01

Typical Fire Hydrant Installation

04/08/2013
W5-01

Typical Concrete Straddle Block Detail

04/08/2013
W5-02

Typical Straddle Block Pipe Clamp Detail

04/09/2013
W5-03

Thrust Blocking Details

04/12/2013
W5-04

Gravity Thrust Block Details

04/13/2013
W6-01

Typical Valve Box

04/16/2013
W7-01

Typical Installation "Double Check Valve" Backflow Prevention Device

04/17/2013
W7-02

Typical Installation "Reduced Pressure" Principle Backflow Prevention Device

04/18/2013
W7-03A

PRV Vault Plan

05/10/2013
W7-03B

PRV Vault Section

05/07/2013
W8-01A

Irrigation Control Backflow Preventor

05/09/2013
W8-01B

IrrigationControl Typical Drain Valve

05/13/2013
W8-01C

Irrigation Control Quick Coupler Valve

05/15/2013
W8-01D

Irrigation Control Typical Small Irrigation Head Installation

05/16/2013
W8-01E

Irrigation Control Typical Carrier Sleeve

05/16/2013
W8-01F

Irrigation Control Typical Underdrain Crossing

05/20/2013
W8-01G

Irrigation Control Typical Zone Valve Installation

05/20/2013
W9-01A

Typical Backflow Preventer for Lawn Sprinkler Systems

05/24/2013
W9-01B

1", 1 1/2", 2" & 2 1/2" Double Check Installation 

06/03/2013
W9-01C

Double Check Valve Assembly Customer Owned (Above Ground) 3" Thru 10"

06/03/2013
W9-01D

DCVA - 3" Thru 10" (for Domestic Service Only) Below Ground Installation

06/13/2013
W9-01E

Double Check Detector Assembly 3" Thru 10" (for Fire Service)

06/13/2013
W9-01F

Double Check Detector Assembly Customer Owned (Above Ground) 3" Thru 10"

06/17/2013
W9-01G

Reduced Pressure Detector Backflow Assembly 2 1/2" - 10" Customer Owned (Above Ground)

06/17/2013
W9-01H

Reduced Pressure Detector Backflow Assembly 2 1/2" - 10" Customer Owned In Vault

06/26/2013
W9-01I

Reduced Pressure Backflow Assembly 2 1/2" - 10" Customer Owned (Above Ground)

06/27/2013
W9-01J

1" Reduced Pressure Backflow Preventor

07/02/2013
W9-01L

Reduced Pressure Backflow Assembly Customer Owned In Vault

07/08/2013
W9-01M

Meter Installation W/By-Pass 2" and Larger

07/09/2013