Item B - Ice and Snow Policy - Laserfiche WebLink

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Table 2. Weather Event: LIGHT SNOW STORM WITH PERIOD(S) OF MODERATE OR HEAVY SNOW Calcium Magnesium Acetate 25% Magnesium Chloride 27% Pre-wet Aggregate/Magnesium Chloride nt nt nt i~itiaJ Mai~ ~ ction Dot Above 32 F, Dry, wet, *Monitor pavement temperature closely steady and slush, or N/R N/R N/R N/R N/R N/R *Treat icy patches if needed with See See See See See See CMA ~ 30-40/lm, MgC1 ~ 15-35/lm or rising light cover comment comment comment comment comment comment pre-wet aggregate snow 32 F, Apply ~ Apply ~ Reapply Reapply *Application rates will depend on dilution or below is Dry 30-40/ 15-35/ N/R ~30-40/ ~15-35/ N/R potential imminent lm lm lm lm 25 to 32 F, Wet, slush, Apply ~ Apply ~ Plow- as Reapply Reapply Plow- as *Application rates will depend on dilution remaining in or light 40-50/ 20-40/ needed ~40-50/ ~20-40/ needed potential lm lm and apply lm lm and apply range snow cover plow- as plow- as plow- as plow- as needed needed needed needed 20 to 25 F, Wet, slush, N/R Apply ~ Plow- as N/R Reapply Plow- as *Application rates will depend on dilution remaining in or light plow- as 20-40/ needed plow- as ~20-40/ needed potential needed lm and apply needed lm and apply *Do not apply CMA at this temperature range snow cover plow- as plow- as range needed needed 15 to 20 F, Dry, wet, N/R Apply ~ Plow- as N/R Reapply Plow- as *Application rates will depend on dilution remaining in slush, or plow- as 45-70/ needed plow- as ~45-70/ needed potential range light cover needed lm and apply needed lm and apply *Do not apply CMA at this temperature plow- as range snow needed 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 needed needed needed needed needed and apply *Apply pre-wet abrasives only falling cover 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.