Providence Park Stadium Expansion

Providence Park Stadium ExpansionPortland, OR

Providence Park Stadium Expansion

• Technical Information

• Project Completion Date: 07/01/2019

• Project Location: Portland, OR

• Size of Project: Precast = (260) pieces and (980) CY

• Strength Requirements: Precast = 5000 PSI

• Water/Cement Ratio(s): n/a

• Unique or High Volume Admixtures: n/a


• Describe unique mix designs: n/a

• Describe unique specifications/requirements (flatness, color, etc.): n/a

• Describe placement challenges or unique techniques: n/a

• Describe other special technical aspects: n/a


The Providence Park expansion project is in the heart of downtown Northwest Portland Oregon. The stadium, originally constructed in 1925 is now home to two professional sports teams, the Portland Timbers and the Portland Thorns. The latest expansion to the stadium

added 4,000 seats to the east grandstand and a slew of upgrades around the stadium utilizing numerous different types of concrete construction including post-tensioned, pre-stressed, precast and cast in place concrete.


Given the tight footprint of the project site, trusses were installed with the help of multiple cranes. The light-rail line right next to the expansion was operational throughout the project. Located in a congested urban area, the field was used as lay

down space and the turf replaced after each phase of the project.


Given that construction would have to be completed during the offseason, schedule was a major driving force for a successful stadium expansion. Precast concrete was selected for the 3 level tiered seating sections. Over (260) pieces of precast raker beams, risers, stairs and

walls totaling (980) CY of concrete were produced offsite and delivered to the jobsite.


Precast erection was performed directly from the stadium’s pitch. The precaster and general contractor worked through many challenges in order to complete erection including tight access to the erection site, transportation/erection

orientation of precast for crane and complex connections. Erection areas were closely monitored as Tanner creek (which runs under Providence Park Stadium) had loading restrictions.


The stadium expansion precast sections featured (39) cantilevered raker beams supporting (134) precast/pre-stressed risers. The largest of these raker beams were over 31’-0” long by 7’-0” tall weighting over 45,000 lbs and are supported by CIP moment frames with a single

connection that is over 6’-0” tall.


The concrete team re-pouring the sidewalks after new micropiles were drilled down to anchor the new expansion and cantilevered roof. A board-formed concrete column is already in place. The team also regularly surveyed the site to confirm layout and placement of concrete

to ensure quality.


The expanded concourse hangs over the public sidewalk, creating an inviting covered gathering space for the public and fans to enjoy before or after a match. The 25-foot tall arcade is lined with towering board-formed concrete columns.


The expansion project included many different types of concrete finishes. The structural concrete was accented with higher end form liner and polished finishes that complement each other and add to concourse experience.


The concrete team used surveying equipment to obtain exact measurements to match raker embeds set into the concrete columns, allowing them to custom fabricate the connections in the adjoining precast concrete. More surveys were conducted on the roof truss

attachments so custom-milled plates could prefabricated and guarantee alignment. The project team proved the value of utilizing these new technologies and visualization techniques to successfully complete the 120-foot cantilevered canopy.


A view of the new 3-story expansion transitioning into the old section. The stadium’s original 1925 master plan envisioned a U-shaped seating bowl that has now been completed. The project team knew the Timbers Home Opener match was

scheduled for June 1 and, even with the playoff delay, successfully reached substantial completion a week early.

Providence Park Stadium Expansion

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