Dear Valued Customer,
From Sunday, July 26, through Friday, July 31, Tualatin Valley Water District (TVWD) will close a section of northbound SW 185th Avenue between SW Tualatin Valley Highway and SW Alexander Street each night from 9 p.m. to 5 a.m.
During these overnight closures, TVWD will:
- Connect the new water main- which will be installed beneath SW Alton Street - to the existing water system.
- Disconnect the old water main.
- Repave the section of SW 185th Avenue affected by water main construction.
TVWD will work overnight to reduce impacts on daytime traffic and nearby businesses while completing important water system improvements safely and efficiently.
This work is part of TVWD’s Alton Street Water Main Replacement Project, which will install more than 500 feet of new 8-inch water main under SW Alton Street. The project will improve water reliability, increase water flow and pressure, and enhance fire protection for the surrounding area.
OVERNIGHT CLOSURE DETAILS
- Dates: July 26-31, 2026
- Time: 9 p.m.-5 a.m.
- Location: Northbound SW 185th Avenue, between SW Tualatin Valley Highway and SW Alexander Street
WHAT TO EXPECT
Detour
A signed detour will be in place each night between July 26 and 31 from 9 p.m. to 5 a.m. The road will reopen every morning at 5 a.m. and close again each evening at 9 p.m. Please see the detour map below.
- Northbound SW 185th Avenue: East on SW Tualatin Valley Highway → North on SW 182nd Avenue → SW Alton Street
- Southbound SW 185th Avenue: East on SW Alexander Street → South on SW 182nd Avenue → SW Alton Street
- Eastbound TV Highway: East on SW Tualatin Valley Highway → North on SW 182nd Avenue → SW Alton Street
- Westbound TV Highway: North on SW 182nd Avenue → SW Alton Street
Traffic and Access
- Homes and businesses will remain accessible during construction.
- Expect delays and slower travel times.
- Please slow down and watch for crews working in the area.
- Traffic control devices and detour signs will guide drivers around the work zone.
- Emergency vehicle access will be maintained at all times.
- Bicycle lanes within the work zone will be temporarily closed. Signs will direct cyclists to an alternate route.
General Impacts
- Construction equipment and crews working overnight.
- Noise, dust, and vibration.
Water Service
Some nearby homes and businesses will experience planned temporary water service interruptions while the new water main is connected. If your property is affected, TVWD will provide at least 48 hours' advance notice before any scheduled water shutoff.
QUESTIONS?
Contact TVWD Communications:
Thank you for your cooperation as we plan to make important improvements to your neighborhood’s water system.
