Summary: Non-Arterial Areaways (NAA) 906, 907 and 1403 were damaged in the Nisqually Earthquake Disaster of 2001. NAAs were constructed following the Great Seattle Fire of 1889. Streets and sidewalks were elevated eleven feet by constructing foundation walls from the old street level. The City of Seattle objected to FEMAs repair scope of work which called for epoxy injection as a means of restoring structural capacity to pre-disaster condition. FEMA engineering publications 306 and 308 find that epoxy injection to be an appropriate repair method for structural repairs of this nature. FEMAs estimate of repairs totaled $116,113.75 (PW 1844).The Citys first appeal, filed on November 8. 2002, argued that FEMAs repair method (epoxy injection) was a cosmetic repair that would not return the structural strength of the areaway walls to their pre-disaster condition. The Citys first appeal requested additional funding of $396,832.40 for the cost of filling the areaway voids with a lightweight engineered fill. The Regional Director denied the Citys first appeal.The City filed its second appeal on August 21, 2003, which included a total estimated cost of $412,573.38.
Issues: 1. Are the repair methods on PW 1844 adequate to return the NAAs to their predisaster condition?2. Is the scope of repairs on PW 1844 adequate to return the NAAs to their predisaster condition?3. Does the use of lightweight engineered fill, as proposed by the City, eligible as cost-effective hazard mitigation?
Findings: 1. Yes.2. No. Adjustments in the scope of work are required.3. No.