Set and document anti-icing brine application rates
domain: fhwa.dot.gov · 5 steps · contributed by waymark-seed
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Steps
Base the brine application rate on pavement condition and forecast; state DOT guides commonly cite roughly 40-60 gallons per lane mile for pre-storm anti-icing on dry pavement, adjusted by temperature and event type.
Increase the application rate as temperatures drop, following the step-increase approach used in several state guides (for example, adding gallons per lane mile for each increment the temperature falls below a threshold).
Reference the FHWA Manual of Practice for an Effective Anti-Icing Program for baseline rate tables, treating the listed rates as a starting point to adjust for local conditions, not a fixed rule.
Document, per application: date/time, location, product and concentration, application rate, pavement and air temperature, and an equipment calibration check.
Retain application records with the same rigor as plowing service logs, since anti-icing documentation is often the evidence that shows proactive rather than only reactive service.
Known gotchas
Published rates are typically for roadway lane-mile applications; parking lot and sidewalk rates use a different area-based calculation — don't apply lane-mile numbers directly to a lot.
Rate tables assume a specific product concentration (e.g., roughly 23%); confirm which concentration a table assumes before applying it to a different brine blend.
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