T0777 Attachment 5 - Spreading Services Guide.pdf

This document comprises solid chemical application guidelines developed by the New Jersey Department of Transportation (NJDOT) for their 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. These guidelines establish standard protocols for the application of solid de-icing chemicals across various winter weather conditions.

The guidelines provide detailed operational protocols organized by weather event type (light snow storms, moderate or heavy snow storms, frost or black ice, freezing rain, and sleet storms) and pavement temperature ranges. For each scenario, the document specifies initial and subsequent maintenance actions, chemical spread rates measured in pounds per lane-mile, and application timing relative to precipitation events. Chemical spread rates vary significantly based on temperature and precipitation intensity, ranging from 150 to 350 pounds per lane-mile for most conditions. Key operational directives include pre-wetting solid chemicals before application, adjusting application rates based on moisture content and temperature fluctuations, monitoring pavement conditions closely, and plowing before chemical application to remove excess snow and ice. Below 15°F, the guidelines recommend against chemical application, substituting abrasives instead to enhance traction.