Northwest Demolition was contracted to demolish and remove a five-story reinforced concrete structure on the busy University of Hawaii at Manoa campus. The UH Snyder Hall structure, formerly used as a science/laboratory building, was tied into the adjacent Edmondson science building via covered walkway between Levels 1 through 4. Remaining in operation for the duration of demolition, the Edmondson building had an expansion joint gap of just 3 inches between its walkway and the UH Snyder Hall structure being demolished. A scaffold was erected on the structure’s Southeast corner to protect the adjacent Edmondson building’s roof garden.
NWDD mobilized its specialized High Reach Excavator to surgically demolish the near-zero property line building, working systematically in a bay-by-bay, top-down approach. The heavily congested site and surrounding campus required strict coordination with UH campus personnel and a myriad of subcontractors to coordinate the heavy trucking and loadout effort, which saw the removal of over 6000T of concrete and C&D debris from site. Post foundation removal, NWDD was retained to excavate, manage, and dispose of nearly 1000T of pesticide-impacted soil. Post demolition, NWDD graded the project site for positive drainage and installed a topsoil cover that was regrassed and converted into a walkway/picnic area.
The work was compressed within an aggressive project schedule requiring substantial completion over the summer break prior to the return of students to campus for the fall semester. Northwest Demolition completed the project ahead of schedule and with no safety incidents or impact to the surrounding UH Manoa campus.