Sexton Mountain Reservoirs Inspection Reservoir Evaluation, 5.0 Million Gallon
1998-2003
Client: City of Beaverton, Oregon

In the first phase, a structural evaluation of this existing 5.0 Million Gallon prestressed concrete water reservoir for gravity and lateral loads was performed. A report was generated, which included the results of the structural analysis as well as reporting of the existing condition of the reservoir based on field investigations. The report also included preliminary construction cost estimates and repair recommendations for existing construction defects and roof ponding conditions.

The second phase of this project consisted of design and generation of construction documents for various repairs, including the installation of new concrete columns to support areas of roof ponding. This design detailed a process of pouring new columns through temporary roof penetrations.

Milwaukie Reservoir
Reservoir Evaluation, 1.5 Million Gallon
2002
Client: City of Milwaukie, Oregon

 

PSE’s involvement in this project for the City of Milwaukie was to analyze an existing 1.5 Million Gallon elevated steel reservoir for current gravity and lateral loads.

The reservoir, constructed in 1962, is supported on 12 braced columns 100’ above the ground elevation.

Services for this project included the analysis and design of retrofit members to bring the reservoir up to current essential facility requirements.