Jackson Township Highway Department
TEMPERATURE EFFECT ON SALT

TEMP FAHRENHEIT LBS. OF ICE MELTED  
BY 1 LB OF SALT
EFFECTIVENESS
30 Degrees
46.3#
100%
25 Degrees
14.4#
31%
20 Degrees
 8.6# 
18.5%
15 Degrees
6.3#
13.6%
10 Degrees
4.9#
10.5%
5 Degrees
4.1#
8.8%
0 Degrees
3.7#
8.0%
-6 Degrees
3.2#
6.9%
NOTE THE LARGE DROP OF EFFECTIVENESS FROM 30 DEGREES TO 25 DEGREES (100% DOWN TO 31%).  BRINE IS ADDED TO THE SALT AS A CATALYST TO MAKE IT MORE EFFECTIVE AT LOWER TEMPERATURES.  BRINE IS ADDED TO DRY ROADWAY PRIOR TO A SNOW AND ICE EVENT TO PREVENT INITIAL SLIPPERY CONDITIONS AT THE ROAD SURFACE.
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