T0777 Attachment 5 - Spreading Services Guide.pdf

This document is the Solid Chemical Application Guidelines for an Effective Anti-icing Program prepared by the New Jersey Department of Transportation. The guidelines are based on materials adapted from the Manual of Practice for an Effective Anti-Icing Program originally developed by the Federal Highway Administration (FHWA), US Army Cold Regions Research and Engineering Laboratory, and the Corps of Engineers in 1996.

The document provides operational guidance for the application of solid chemical de-icing agents across five weather event scenarios: light snow storms, moderate to heavy snow storms, frost or black ice conditions, freezing rain storms, and sleet storms. For each weather event, the guidelines specify pavement temperature ranges, maintenance actions, chemical spread rates measured in pounds per lane-mile, and subsequent operational protocols. Chemical application rates vary significantly based on temperature conditions, ranging from 150 lb/lane-mi for light snow at 32°F to 350-400 lb/lane-mi for more severe conditions. The guidelines emphasize timing of applications relative to traffic rush periods, frequency of reapplication based on precipitation intensity and pavement conditions, and recommendations against chemical application below 15°F, where abrasives are recommended instead. Key operational principles include pre-wetting solid chemicals, plowing before chemical applications to remove excess snow and ice, and monitoring pavement temperatures closely to adjust application rates based on environmental conditions.