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Owner: Puget Power
Architect: Waterleaf Architects
Completion: November 1992
The bulk of Charter’s challenges during construction of this
new service truck maintenance facility lay beneath the surface, but
Charter’s innovative techniques and can-do attitude resulted
in a successful job.
The project itself was fairly typical: a masonry structure supported
by a CMU and structural steel system. The foundation system,
however, was complicated by a high water table. Moreover, the ground
water contained excessive hydrocarbon content that prohibited standard
dewatering procedures. Charter designed a system that allowed
crews to temporarily dewater the site, remove substandard soils and
treat the removed ground water prior to disposal. Large precast
utility vaults were installed to serve as cofferdams after the dewatering
procedure was complete. The structural footings and walls were then
constructed inside the vault.
Once the foundation system was complete, Charter moved forward with
construction of the truck maintenance facility, which included three
40-ton hydraulic vehicle lifts and associated fleet maintenance equipment.
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