Item B - Ice and Snow Policy - Laserfiche WebLink

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Table 4. Weather Event: FROST OR BLACKICE Calcium Magnesium Acetate 25% Magnesium Chloride 27% Pre-wet Aggregate/Magnesium Chloride ~ ~ Mainte~ ction ~ Above 32 F, *Monitor pavement temperature closely steady and Any level *Treat icy patches if needed with rising N/R N/R N/R N/R N/R N/R CMA ~ 30-40/lm or MgC1 (~ 15-35/lm 28 to 32 F, Apply ~ Apply ~ Reapply Reapply Remaining in < 100 20-30/ 15-30/ ~20-30/ ~15-30/ range or falling vehicles/hr lm lm lm lm 32 F or below, and equal to or Apply ~ Apply ~ Apply Reapply Reapply Reapply *Application rates will depend on dilution below dew > 100 30-40/ 20-35/ ~30-40/ ~20-35/ potential point vehicles/hr lm lm lm lm 25 to 28 F, remaining in Apply ~ Apply ~ Reapply Reapply range, a~d Any level 30-40/ 20-35/ Apply ~30-40/ ~20-35/ Reapply *Application rates will depend on dilution equal to or lm lm lm lm potential below dew point 15 to 25 F, remaining in *Application rates will depend on dilution Range, and Any level N/R Apply ~ Apply N/R Reapply Reapply potential equal to or 25-40/ ~25-40/ *Do not apply CMA at this temperature below dew lm lm range point Below 15 F, Any level N/R N/R Apply N/R N/R Reapply *Do not apply CMA or MgC1 at this Steady or temperature range falling Below 15 F, Dry or N/R N/R Apply and N/R N/R Plow- as *Do not apply CMA or MgC1 at this steady or light snow plow- as plow' as plow' as plow' as plow' as needed temperature range falling cover needed needed needed needed needed and apply *Apply pre-wet abrasives only CHEMICAL APPLICATIONS: These application rates are starting points. Local experience should refine these recommendations. Time chemical applications to prevent deteriorating conditions or development of packed and bonded snow-. Monitor temperature and humidity to determine application timing. PLOWING: Before applying any ice control chemical, the road surf:ace should be clear of as much snow- and ice as possible. CHEMICAL RATES: The recommended snow- and ice control material application rates depend on atmospheric and pavement conditions at the time of treatment and on how- these conditions are expected to change over the time period (window) between the current treatment and the next anticipated treatment.