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to traffic in recent months. Wray says that the secret to the use of chemicals is get ting them done soon enough, but not too soon. If put down properly, the salt and calcium chloride can cut the melting time of a heavy snow by as much as three days. One of the biggest contributors to a successful snow fight can be a private weather service, and the Department has entered into a $4,000 con tract with Melpar, Inc., of Falls Church for this winter.
Wray says that a private weather service is capable of providing a specialized weath er forecast for each highway construction district In the state, and such intense and extensive coverage would be unreasonable to ask of the U. S. Weather Bureau.
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