During some winter storms it seems like the department does a good job but during other storms it seems that they aren t doing a very good job. Why the difference in performance?
• One of the biggest factors that determine our performance is the type of storm and temperatures. Storms with low temperatures can be difficult because deicing chemicals become less effective at the lower temperatures. It takes nearly 8 times as much salt to melt a pound of ice at 20 degrees then at 30 degrees. Storms with high winds also are a challenge because the snow quickly blows back onto the roadway after the plows pass. There are reportedly over 65,000 combinations of winter storms that can hit Iowa during the winter and each pose unique problems to snowplow operators.
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