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The restructuring of the electric power grid has created new control and monitoring requirements for which classical technologies may be inadequate. The most obvious way of building such systems, using TCP connections to link monitoring systems with data sources, gives poor scalability and exhibits instability precisely when information is most urgently required. Astrolabe, Bimodal Multicast, and Gravitational Gossip, technologies of our own design, seek to overcome these problems using what are called "epidemic" communication protocols. This paper evaluates a hypothetical power monitoring scenario involving the New York State grid, and concludes that the technology is well matched to the need.