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. The guidelines are based on the Manual of Practice for an Effective Anti-Icing Program developed by the Federal Highway Administration (FHWA), US Army Cold Regions Research and Engineering Laboratory, and Corps of Engineers in 1996. The document serves as a technical reference for the Winter Maintenance Program operated by the New Jersey Department of Transportation.

The guidelines provide operational protocols for the application of solid chemical de-icers across five weather event scenarios: light snow storms, moderate or heavy snow storms, frost or black ice conditions, freezing rain storms, and sleet storms. For each weather condition, the document specifies maintenance actions, chemical spread rates measured in pounds per lane-mile, pavement surface conditions, and temperature ranges to determine appropriate application strategies. Chemical spread rates vary significantly by weather type and temperature, ranging from 150 to 400 pounds per lane-mile depending on conditions. The guidelines establish both initial operation and subsequent operation protocols, with recommendations to apply pre-wetted solid chemicals in most scenarios and to plow before chemical application to ensure excess snow, slush, or ice removal. Temperature thresholds are critical decision points, with different protocols prescribed for conditions above 32°F, between 15°F and 32°F, and below 15°F, and special considerations noted for frost, black ice, and freezing rain situations where higher application rates or more frequent reapplication may be necessary.