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 (NJDOT). The guidelines are based on the Manual of Practice for an Effective Anti-Icing Program originally developed by the Federal Highway Administration (FHWA), U.S. Army Cold Regions Research and Engineering Laboratory, and the Corps of Engineers in 1996. The document serves as the operational framework for NJDOT's Winter Maintenance Program.

The guidelines provide specific chemical application protocols organized by weather event type and pavement temperature conditions. The document includes five operational tables addressing Light Snow Storms, Moderate or Heavy Snow Storms, Frost or Black Ice conditions, Freezing Rain Storms, and Sleet Storms. Chemical spread rates vary based on temperature ranges and weather conditions, with rates specified in pounds per lane-mile. For example, light snow storm applications at 32°F call for 150 lb/lane-mi initial application with 150-250 lb/lane-mi for subsequent operations, while moderate to heavy snow storms at 25 to 30°F require 200-250 lb/lane-mi initially and 200-250 lb/lane-mi subsequently. The guidelines distinguish between solid or prewetted solid chemical applications and specify maintenance actions such as plowing frequency, chemical reapplication timing, and pavement monitoring requirements. Applications below 15°F generally recommend abrasives rather than chemical treatments. The document emphasizes preventing packed and bonded snow development through timely, frequent applications and coordinating chemical treatment with plowing operations.