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. It is adapted from the Manual of Practice for an Effective Anti-icing Program originally developed by the Federal Highway Administration (FHWA) and the US Army Cold Regions Research and Engineering Laboratory, Corps of Engineers, in 1996. The guidelines establish operational standards for the Winter Maintenance Program administered by the New Jersey Department of Transportation.

The document provides operational guidance for applying solid chemical de-icers across five distinct weather event scenarios: light snow storms with moderate to heavy snow periods, moderate or heavy snow storms, frost or black ice conditions, freezing rain storms, and sleet storms. For each weather condition, the guidelines specify pavement surface conditions, temperature ranges, application rates measured in pounds per lane-mile, maintenance actions, and chemical spread rates for both initial and subsequent operations. Chemical application rates vary based on temperature ranges and weather intensity, ranging from 150 to 350 pounds per lane-mile depending on conditions. Initial operations typically use solid or pre-wetted solid chemicals, while subsequent operations employ either solid, pre-wetted solid, or liquid chemicals as determined by pavement temperature, precipitation intensity, and traffic volume. The guidelines recommend plowing procedures prior to chemical applications and provide detailed comments for operators regarding monitoring requirements, reapplication frequency, and conditions under which chemicals should not be applied, particularly below 15°F where abrasives are recommended instead of chemical treatments.