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The estimated cost of completing the computing infrastructure and sensor networks for ShakeAlert is $39.4 million. The annual operation and maintenance cost of the completed system is estimated to be $28.6 million per year. This document also provides estimates of the added costs for a telemetry improvement plan. Building a highly reliable data telemetry infrastructure would cost another $20.5 million; however, this cost could be reduced if project partners provide bandwidth on existing systems. Operating this highly reliable data telemetry would add another $9.8 million per year of costs; but this also could be reduced by partners providing bandwidth at low or no cost to the project.