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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
WW1-01

Flatttop Manhole 6" to 21" Pipe

02/07/2012
WW1-02

Standard Manhole Details

02/16/2012
WW1-02A

48" Extended Precast Manhole Base

08/20/2012
WW1-03

Manhole Bases 24" - 36" Pipe

02/27/2012
WW1-04

Manhole Bases 42" & 48" Pipe

02/27/2012
WW1-05

Outside Drop Manhole

02/28/2012
WW1-09

Inside Drop & Connection to Existing Manhole

03/23/2012
WW1-10

Manhole Step (From CWS Drawing No.11-ST)

03/26/2012
WW2-01

Standard Manhole Frame & Cover

07/25/2012
WW2-02

Suburban Manhole Frame

07/25/2012
WW2-03

Watertight Manhole Frame & Cover

07/24/2012
WW3-01A

Typical Sanitary Sewer Cleanout (Traffic Areas Only)

02/07/2012
WW3-01B

Typical Sanitary Sewer Cleanout (Outside Traffic Areas)

02/10/2012
WW3-01C

2" Pressure Cleanout Assembly

04/24/2012
WW4-01

Sanitary Sewer Strap-On Type Tapping Tee

04/18/2012
WW4-02

Standard Pipe Casing Detail

04/19/2012
WW4-03A

Typical Service Lateral

04/23/2012
WW4-03B

Typical Service Lateral Duplex (2)

04/23/2012
WW4-03C

Typical Service Lateral Connection (Internally Rehabilitated Mainlines)

04/23/2012
WW9-01

Step System (Septic Tank Effluent Pump) Septic Tank Top View

02/10/2012
WW9-02

Step System (Septic Tank Effluent Pump) Septic Tank Side View

02/10/2012
WW9-03

Step System (Septic Tank Effulent Pump) Gravity Discharge Tank Equipment

08/07/2012
WW9-04

Step System (Septic Tank Effluent Pump) Effluent Pumping Tank Equipment

08/07/2012
WW9-05

Step System (Septic Tank Effluent Pump) Tank Riser Detail

08/08/2012
WW9-06

Step System (Septic Tank Effluent Pump) Control and Alarms

08/09/2012
WW9-07

Step System (Septic Tank Effluent Pump) Typical 2" Service Connection Detail

08/09/2012
WW9-08

Step System (Septic Tank Effluent Pump) Typical 4" Lateral Cleanout

08/14/2012
WW9-09

Step System (Septic Tank Effluent Pump) Typical Pipe & Trench Detail

08/14/2012
WW9-10

Step System (Septic Tank Effluent Pump) 2" Pressure Cleanout Assembly

08/14/2012