PSE
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5319 SW Westgate Drive, Suite 215
Portland, Oregon 97221-2411

Portland: 503-292-1635
Bend: 541-382-1004
fax: 503-292-9846
email: contact@psengineers.com
 
5319 SW Westgate Drive
Suite 215
Portland, Oregon 97221

(503) 292-1635
contact@psengineers.com
 
 
Peterson Structural Engineers
Construction Services
Design Review
Forensics and Damage Analysis

Dedicated to providing quality Structural Engineering consulting services
Serving the Pacific Northwest and beyond for over 40 years


Featured Projects:
McMillin Reservoir Replacement

Tacoma, WA
Reservoir Design
(2) 33.0 Million Gallon

2008-2011
Client: Tacoma Public Utilities

Peterson Structural Engineers was awarded a landmark project in Tacoma, Washington for the structural design of the two McMillin 33.0 Million Gallon prestressed concrete reservoirs.

The largest diameter water reservoirs constructed to date, they are each 485 feet in diameter. The base isolated tanks are prestressed with four layers of strand wrapping totaling over 300 miles. Each reservoir has a total of 332 columns. Combined, they have over 17 acres of floor and roof slabs.

PSE has completed structural design documents for this project, working closely with members of the project team to insure the right balance of economy and constructibility of design. Our staff is in the process of providing construction support services. Construction is expected to be completed in 2011.


Willamette Falls Fishway Foundation Repair and Upgrade

West Linn , OR
1991-2011

Client: Oregon Department
of Fish and Wildlife

PSE’s involvement in this project for the Oregon Department of Fish and Wildlife (ODFW) has extended for over a decade.  It began in 1991 with the upgrading of a 30-year old fish ladder complex at Willamette Falls in West Linn, including the repair and upgrade of existing elements as well as the design of additional new structures. Following the floods of February 1996, the focus of the project expanded to inspect the damage to the fishway, study the potential for future flood damage and design for those anticipated conditions.

The investigation continued in 2009 when ODFW determined that additional damage had occured to the concrete structure and that an updated evaluation of the fishway was necessary. PSE entered into a competitive proposal process and was awarded the opportunity to lead the design team in the structural analysis and repair of the fishway.

The first phase of the project has involved field investigations and evaluation of the foundation to determine the cause of the damage. Portions of the fishway had experienced undermining, causing the structure to shift, joints to expand, and concrete to crack. It was recommended that emergency repairs be installed before the high water season to mitigate the risk of complete structural failure. After the temporary repairs were in place, instrumentation was installed to monitor the water levels and temperatures and any corresponding movement in the structure. The data collected will assist in the following phase of the project, which consists of the design for permanent repairs to the fishway.


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Oregon State Certified Emerging Small Business (ESB)

 

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