The TeraGrid, formed in 2003, has evolved as a federation of heterogeneous HPC and associated resources, and its monitoring, logging, and accounting environment has evolved along with it. TeraGrid monitors and tests, via various tools, all its software and services, including HPC user-level services, current system queues and loads, GridFTP transfers and performance, GRAM job submissions, and bandwidth on the dedicated network between sites. TeraGrid¹s allocations and accounting system evolved from the policies of the earlier PACI and Supercomputer Centers program and now supports capabilities such as multi-site/multi-resource allocations, user notification, etc. Central accounting is supported by the AMIE protocol, and usage is tracked as job-level records from all sites. Users and staff can view the current monitoring results and accounting for their projects via the user portal as well as other web interfaces.