Iowa winter quick Facts - statewide data
Roadway responsibilities
Centerline-miles of roadway (ramps not included)
9,393
Lane-miles of roadway (miles of roadway times the number of lanes)
24,867
Number of bridges
4,120
Equipment
Snow removal trucks
901
Motor graders
53
Front-end loaders
134
Heavy-duty, self-propelled snow blowers
11
Medium-duty snow blower attachments for end loaders or tractors
30
Light-duty snow blower attachments for tractors
34
Workforce and facilities
Permanent employees
1,044
Supervisors
53
Garages
109
Salt permanent storage capacity (tons)
213,913
Materials use
Rock salt (tons)
231,810
Liquid salt brine (gallons)
14,363,234
Liquid calcium chloride (gallons)
95,597
Calcium chloride flake (tons)
2,430
Sand (tons)
32,547
Financial
Average annual winter operations budget
$38 million
Roadway weather information systems
Road weather information systems (RWIS)
62
RWIS sites are full-service weather stations along the roadside that provide atmospheric and pavement specific weather information, such as the temperature of the pavement surface.
Climate Data — 20-year average, fiscal years 1991-2010
Average snowfall (inches)
31.7
Average number of snow events
23.3
Average winter season precipitation days
52
A precipitation day is any day which .01 inch of liquid precipitation is received.
