This interim report presents the results of our self-initiated audit of mail delivery, customer service, and property conditions at the Waukesha Main Post Office (MPO) in Waukesha, WI (Project Number 22-147-2), and responds to a request from Senator Tammy Baldwin asking for a review of delivery operations in the Milwaukee, WI area. The Waukesha MPO is in the Wisconsin District of the Central Area and services ZIP Codes 53186, 53188, and 53189. These ZIP Codes serve about 94,982 people in a predominantly urban area.1 We judgmentally selected the Waukesha MPO based on the number of Stop-the-Clock (STC) scans2 performed at the unit.

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