T0777 Attachment 5 - Spreading Services Guide.pdf

This document comprises the Solid Chemical Application Guidelines for an Effective Anti-icing Program published by the New Jersey Department of Transportation. The guidelines are adapted from the Manual of Practice for an Effective Anti-Icing Program prepared by the Federal Highway Administration (FHWA), US Army Cold Regions Research and Engineering Laboratory, Corps of Engineers, in 1996. The document serves as operational guidance for the state's Winter Maintenance Program.

The document provides detailed operational protocols for applying solid chemical de-icers across five distinct weather scenarios: light snow storms with moderate or heavy snow periods, 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 spread rates vary significantly based on temperature conditions, ranging from 150 to 400 pounds per lane-mile depending on conditions and weather intensity. The guidelines emphasize proactive chemical application ahead of traffic rush periods, with instructions to plow excess snow before chemical applications to ensure pavement contact. Recommendations specify pre-wetted solid chemical applications, timing intervals for reapplication, and adjustments to spread rates based on precipitation intensity and pavement temperature trends. Below 15°F, the guidelines recommend against chemical application, instead recommending abrasives to enhance traction.