Tuesday - September 20, 2016

WR1 roof construction begins next month

The path from Parkhill Street to the reservoir site will be closed.

Waluga Reservoir 1 Roof Replacement Construction Update

This summer, design and permitting was completed for the project to replace the roof and columns of the Waluga Reservoir 1 (WR1). The Lake Oswego Council recently awarded Ward Henshaw Construction Company Inc. (Ward Henshaw) the construction contract for the project. Ward Henshaw is the contractor that recently built the new Waluga Reservoir 2.

Construction Starting Soon

Starting next week, crews expect to begin preliminary site activities, to prepare for construction. This includes installing tree protection fencing, erosion control measures and mobilizing equipment to the site. Construction is set to begin in early-mid October and be complete in spring 2017.

Key Information:

  • Work hours are 7 a.m. – 6 p.m., Monday to Friday. Some Saturday work will occur from 8 a.m. - 6 p.m.
  • Access to the site will be from Carman Drive. Flaggers will be present during increased construction traffic flows.
  • No rock excavation or concrete crushing will occur on-site.
  • Noisiest activities are expected to be roof saw-cutting and concrete placement.
  • No public access is allowed on the site during construction.

Schedule (subject to change)

Activity Approximate Timeframe
Preliminary work: site preparation, erosion control measures, tree protection fencing, equipment set up Week of September 26 – early October
Installing shoring support for the roof: crane placing material, most work occurring inside the tank Mid-October - November
Saw-cutting the roof into squares *noisy activity Mid-October - November
Demolition and removal of roof and columns: crane picking up materials and removing off-site November - December
Forming/placing concrete for roof slabs and columns *noisy activity/increase in truck traffic Winter 2017
Shoring support removal; tank disinfection and leak test Spring 2017
Site clean-up and equipment demobilization Spring 2017

Pedestrian Access Safety Reminder

As the reservoir site will be an active construction zone with cranes moving materials overhead, no pedestrian access will be allowed during construction. Trails from Parkhill Street through East Waluga Park will remain open, however, the path from Parkhill Street to the reservoir site will be closed. Please obey construction signage and instruct children to avoid the site.

What Can Neighbors Expect?

Construction will be smaller in scope and duration than Waluga Reservoir 2’s construction – crews will be performing a specific task to remove and replace the roof and columns on the existing WR1 structure. Although cranes, equipment and trucks will be present, no rock excavation or concrete crushing will occur on-site. Crews will saw-cut parts of the roof into small pieces, and a crane will remove each portion from the roof. Shoring support will be set up inside the tank and concrete will be placed for the new roof and columns.

Neighbors can expect to see and hear concrete dump trucks, concrete pumper trucks, saw-cutters, large cranes, delivery and movement of materials and equipment in use during work hours. There may be an increase in noise, truck traffic and vibration, depending on neighbors’ locations. The noisiest activities are expected to occur during the roof saw-cutting and concrete placement.

Access to the site will be from Carman Drive. Crews will park on-site or at the West Waluga Park parking lot.

Equipment and Materials

All equipment and materials needed for the roof replacement will be stored on the reservoir site (not on side streets). A construction trailer will be set up for construction personnel. Cranes will be present, moving materials across the site. Concrete dump trucks, concrete pumper trucks and small backhoes will also be operating.

The Importance of WR1

WR1 is a crucial component to the Partnership’s system to provide drinking water to Tigard and Lake Oswego residents. Both Waluga Reservoirs (1 and 2) work together in tandem to store and provide clean, drinking water for both communities. Once the roof is replaced, WR1 is expected to provide safe, reliable water storage for at least 50 years.

We are committed to keeping neighbors informed about the work. For more information about construction visit the Construction Flyer or lotigardwater.org/?p=waluga-reservoir-1contact us, or follow @LOTWater on Twitter.