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) Winter Maintenance Program. The guidelines are based on modifications to 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. This is an operational guidance document rather than a contract award, providing standards and best practices for the application of solid de-icing chemicals across New Jersey's transportation infrastructure.

The guidelines establish specific protocols for the application of solid or pre-wetted solid chemicals based on weather conditions and pavement temperature ranges. Chemical application rates vary by weather event type—including light snow storms, moderate or heavy snow storms, frost or black ice conditions, freezing rain, and sleet storms—with spread rates ranging from 150 to 350 pounds per lane-mile depending on conditions and temperature. Initial operations typically involve pre-wetted solid chemical applications, with subsequent operations adjusting rates based on temperature changes and precipitation intensity. Specific recommendations include applying chemicals ahead of traffic rush periods, plowing excess snow before chemical application, and monitoring pavement conditions closely. The document notes that chemical application is not recommended below 15°F in most scenarios, with abrasives recommended as an alternative in extremely cold conditions. All guidance emphasizes preventing ice formation and bonded snow development while ensuring pavement remains wet, slushy, or lightly snow-covered after treatment.