T0777 Attachment 5 - Spreading Services Guide.pdf

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

The document provides operational guidance for the application of solid chemical de-icing agents across five distinct weather scenarios: light snow storms, moderate or 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, and chemical spread rates in pounds per lane-mile for both initial and subsequent operations. Chemical application rates vary significantly based on conditions, ranging from 150 to 350 pounds per lane-mile depending on temperature, precipitation intensity, and traffic volume. Key operational principles include timing applications to prevent rather than remove ice and snow accumulation, plowing before chemical applications when excess precipitation is present, and generally not recommending chemical applications below 15°F. The guidelines emphasize continuous monitoring of pavement temperature and precipitation conditions to determine appropriate reapplication frequencies and rate adjustments throughout winter events.