Engineering

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Wastewater Treatment Facility - Proposed Rate Increase

To replace the aging 1964 Tryon Creek wastewater plant, Lake Oswego is undertaking a major capital investment in a new wastewater treatment facility. A rate increase is necessary to help fund this essential infrastructure investment.

During their September 1 meeting, City Council evaluated two rate options: a one-time 28% increase, followed by annual inflationary adjustments of about 3.9% or an 8% annual increase for 10 years, followed by annual inflationary adjustments of about 3.9%.Council will determine which approach to take at their October 13 meeting.

The project team recently held virtual community informations to discuss the project and rate increase. To view the sessions or learn more visit here. 

Read More 2026 Pavement Rehabilitation

Paving is taking place on several streets in Lake Oswego in summer 2026. Paving activities may include extensive repair areas, grinding existing pavement, a new overlay or pavement of the driving lanes, new curb ramps, signal improvements, storm drains, and some waterline upgrades. Learn more about the streets being paved this year and what to expect. 

Read More McEwan Road Sidewalk

Construction is underway through summer 2026 for a new sidewalk on the north side of McEwan Road, between SW 65th Avenue and Kristi Way. 

Read More McVey Pump Station Replacement Project

The City is replacing the McVey Pump Station, located at the corner of McVey Avenue and Oak Street. The pump station has had a series of pump failures as a result of electrical and mechanical issues.

Construction of the newly designed pump station started in early April and is expected to continue for about 12 months.

Read More Safety Concern Form

We want your help in making community streets a safer and more comfortable place. While staff work diligently on addressing issues that are spotted, we understand that we can’t catch everything. If you have a concern related to traffic, please use this form to report issues

Read More Go sLOw: 20 is Plenty

In September 2025, City Council approved an ordinance to lower the speed limit on local residential streets and some neighborhood collectors in Lake Oswego from 25 miles per hour (mph) to 20 mph.

Public Works crews rolled out the Go sLOw speed reduction program, moving clockwise one neighborhood at a time. Phase 1 included replacing existing 25 MPH signs and was completed in late 2025. Phase 2 added new posts and additional signs and was completed in summer 2026.

New speed limits took effect as soon as the signs changed.

Read More Wastewater Treatment Facility Project

Lake Oswego, with Portland’s support, is planning to build a new, environmentally sustainable wastewater treatment facility to replace the old plant. 

This project will ensure safe, reliable wastewater treatment for generations to come, protect public health and the environment, and reduce the risk of more costly emergency repairs.

Read More Only Rain Down the Drain!

Did you know that water entering our storm catch basins flows untreated directly into our local creeks, rivers, lakes, and oceans untreated? That means pollutants like trash, motor oil, chemicals, and yard waste go straight into the environment—harming wildlife, our water supply, and the places we swim. Help keep our waterways clean by following this simple rule: Only rain down the drain.

• No pool or hot tub water (chlorinated, brominated, copper-treated, or heated)
• No litter, leaves, or yard waste
• No fertilizers or pesticides
• No soaps or household cleaners
• No pet waste

Discharging the above is considered an illicit discharge and can result in fines.

Read More Contact Information

Phone: 503-635-0270
Fax: 503-635-0269

Location:
2nd Floor City Hall, 380 A Avenue
Lake Oswego, OR  97034

Mailing Address:
PO Box 369, Lake Oswego, OR  97034

Walk in Customer Hours:
Monday - Friday 8:00 a.m - 4:00 p.m.

Water Treatment Plant
503-635-0394

Water Conservation
503-675-3747
 

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