This Summary focuses on the Seismic risks and challenges of the oldest 2 & 3 story section of the Schlador school building.  Included are recent cost figures representing overall campus remodel, required seismic upgrade costs if the oldest section were to continue as an educational facility and comments about the campus as a whole from prior community based facility studies.

Excerpts from “District Wide Community Based Feasibility Study 2008” conducted by Randy Saunders (RSS Architecture)

Regarding the 1938 portion of the campus:

“We do not believe investing large sums of money in the upgrading and modernization of this physical plant is good financial stewardship… During our examination and touring of the Schlador Street buildings we found it very disconcerting and were uneasy with the maze of corridors and circuitous pedestrian paths of travel throughout the facility”

“If the old building cannot be sold we advocate the District have a medium range plan to demolish it.”    

When this original building was built in 1938 there was no code requiring consideration or design to protect against seismic events. The areas of greatest risk are unreinforced concrete foundation, unreinforced slab on grade, and unreinforced structural brick on the exterior walls that have many window openings greatly reducing lateral stability. Additionally, the wood and floor structure do not appear to have capacity to transfer lateral and shear forces and are not positively connected to the concrete walls.

The first effort to understand the risks of the oldest portion of the High School Building is found in information from a 1993 KPFF Structural Engineers report:  “Portions of the Silverton Union High School would be susceptible to structural failure if it were to be subjected to a major earthquake”.   This was based on review of structure following guidelines of 1991 Uniform Building Code.

See DOGAMI report with link below.

The earthquake forces that buildings in our region face identified as structural concerns increased 650% from a base line established in 1945 to 1993 when this report was written following the Sixth Cycle of the Statewide Building Code. The oldest section of the campus was built before this earliest concern for seismic building methods.

The same firm evaluated the building in 2011 following the 11th cycle of Statewide Building code.  With these new codes the estimated costs for remediation rose from $8.75 per square foot in 1993 to $40 per square foot.  This estimate included only demolition and installation of structural elements.

The 2008 Facilities Study RSS Architecture Summary for the Schlador Campus indicated a full remodel budget of $41,104,360 with identified essential Improvements of $18,049,127 that included seismic improvements.  This figure represents the work to replace interior and exterior elements disturbed by Seismic related upgrades as well as the structural element upgrades.

For the 2014 proposed bond project, the anticipated costs of removing the original multi-story structure and converting the campus to a middle school with building construction and upgrades only is estimated to be just under $10 million.

http://www.oregongeology.org/sub/projects/rvs/reports/Mari_sch62.pdf