T0777 Attachment 5 - Spreading Services Guide.pdf

This document is a Solid Chemical Application Guidelines manual for an Effective Anti-icing Program published by the New Jersey Department of Transportation (NJDOT). The guidelines are based on 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 serves as a technical reference for the State of New Jersey's Winter Maintenance Program.

The document provides comprehensive operational guidelines for applying solid de-icing chemicals 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, initial operation procedures, maintenance actions, and chemical spread rates measured in pounds per lane-mile. The guidelines establish tiered application protocols based on temperature thresholds, ranging from above 32°F down to below 15°F, with chemical application rates varying from 150 to 350 pounds per lane-mile depending on conditions. Key operational requirements include monitoring pavement temperatures, timing chemical applications ahead of traffic rush periods, plowing before chemical application to remove excess snow or ice, and adjusting spread rates based on precipitation intensity and pavement conditions. The guidelines note that chemical applications below 15°F are not recommended, and abrasives are recommended as an alternative for such conditions.