Friday - December 11, 2015

Work at Trillium Creek resumes next week

Repairing sewer line near Trillium Creek tunnel.

West Linn Pipeline Construction Update: Mapleton Drive

This update includes information about the following topics. Read more for specific information on each topic:

  • Safety reminder
  • Work hours
  • Trillium Creek Tunnel
  • Pipe connections to the WTP
  • Neighborhood construction meetings

Safety reminder

Construction sites are busy places. The roadway is very narrow and there is a lot of equipment between the active work zone and staging areas. Please be cautious and aware – pedestrians and bicyclists are encouraged to avoid walking or riding through the active work zone.

To maintain safety, please travel slowly in the work areas on Mapleton Drive, and obey flagger directions in all active construction zones.

Work hours

Work hours on Mapleton Drive are 7 a.m. - 7 p.m., Monday to Friday and 9 a.m. - 5 p.m. on Saturdays.

Over the Christmas and New Year’s holidays, crews plan to work through Wednesday, December 23. No work will occur between Thursday, December 24 and Sunday, January 3. During this time, the road will be open and no detour will be in place. Crews will return on Monday, January 4.

Trillium Creek Tunnel

Late Friday afternoon, crews unexpectedly broke a sewer line near the tunnel at Trillium Creek and worked after-hours to repair the line. Work was completed by 9 p.m. Thank you to neighbors for your patience and understanding during this emergency repair.

Late last week, crews started excavating and dewatering the work pits at the creek to prepare for installing the smaller carrier pipe through the tunnel. Unfortunately, due to the heavy rainfall and flooding that occurred this week, this work had to be postponed.

Crews aim to resume working at the creek next week, although this is weather dependent. Crews will need to dewater the pits, push the pipe through the tunnel, fill the pipe casing with sand, backfill the work pits, and place temporary pavement. During this work, nearby neighbors should expect an increase in noise and vibration.

To maintain safety, during work at the creek, the road will be closed to through traffic. Neighbors located east of the creek will need to use the detour route.

Pipe connections to the WTP

Crews have been waiting on some special pipe pieces, manholes and joints to be fabricated to complete the connection of the raw water pipe to the plant. Starting tomorrow, crews expect to begin installing a manhole, a few “bend” (corner) pieces and a closure joint near the WTP staging yard on Mapleton Drive.

This work is expected to take about a week to complete. During this time, a single lane closure will be in place and flaggers will guide traffic through.

Road closure and detour route during pipeline construction

During work hours, a detour is in place and no through traffic is allowed in the active work zone on Mapleton Drive. Please follow the detour signage directing traffic around the closure area.

The road will continue to be closed to through traffic at the active work zone as it moves along Mapleton Drive. Residents located east of the active work zone will need to use the detour route on Nixon Avenue, Elmran Drive and Cedaroak Drive during work hours (refer to detour map link above). Residents located west of the active work zone can use Mapleton Drive between their home and Highway 43 during work hours.

Helpful guidelines

For more information about road closures, detours or pipeline construction, refer to these helpful guidelines.

Neighborhood construction meetings - next meeting Dec. 15 at 6 p.m.

The next neighborhood meeting will be held at Robinwood Station on Tuesday, Dec. 15 at
6 p.m. Please attend to stay up-to-date on construction progress in West Linn and ask the project team questions.

Meeting schedule:

  • The first Tuesday of the month at 7:30 a.m., at Burgerville, 18350 Willamette Drive, West Linn.
  • The third Tuesday of the month at 6 p.m., at the Robinwood Station, 3706 Cedar Oak Drive, West Linn.

For the latest information, follow @LOTWater on Twitter. You can also drop-in to a neighborhood construction meeting or contact us.