A 
A 
U 
 
?E PREVENTA-LE BY SNOW FENCES AT STUDIED LOCATIONS AND BY THE 
_rVATION OF GRADES FOR NEW IMPROVEMENTS AND CAREFUL ATTENTION 
ALIGNMENT. 
THE HEAVIER DISPLACEMENT PLOW AS WELL AS THE TYPES OF ROTARIES 
tE ESSENTIAL DURING EMERGENCY STORMS FOR CLEARING THE INITIAL CUTS 
4D FOR WIDENING CUTS FORMERLY MADE WITH ANY TYPE OF PLOW AND ALSO 
)R THE OPENING OF SUCH ROADS IN THE SPRING THAT WERE NOT DEEMED 
:,SUFFICIENT IMPORTANCE FOR INCLUSION IN THE REGULAR WINTER PROGRAM. 
4 ' YAPIOUS STATE AND LOCAL ORGANIZATIONS REPORT 500 HEAVY DISPLACE- 
NT PLOWS ON HAND, AND 99 ROTARIES, 35 OF THE ROTARIES BEING IN 
IE: STATE OF MICHIGAN. FOR SERVICE IN CONNECTION WITH THE HEAVY 
ZUIPMENT THE VARIOUS WINTER MAINTENANCE PLANTS INCLUDE 1,350 
RACTORS FOR SNOW REMOVAL WORK. TRACTORS IN RARE INSTANCES ARE ALSO 
3ED AS MOUNTS FOR STRAIGHT BLADE PLOWS. 
ALONG WITH OTHER NUMEROUS LIGHT AND HEAVY OUTFITS, MINNESOTA 
IPLOYS A RATHER UNIQUE TYPE OF PLOW IN THE SHAPE OF A WING WIDENER 
BED FOR EXTENDING THE WIDTH OF CUTS MADE WITH OTHER PLOWS. THE 
IDENER IS A TRAILER ARRANGEMENT SUPPORTED BY HEAVY RUNNERS AS 
IOWN IN FIGURE It, AND IS USUALLY HAULED BY ONE 10-TON AND ONE 
TON TRACTOR. THE PLOW ATTACKS THE SNOW BANK WITH THE FORWARD 
LADE, PASSES THE LOOSENED SNOW TO THE REAR BLADE WICH FORCES IT 
ARD AND ROLLS IT TO THE SIDE AND OVER THE TOP OF THE ADJOINING SHELF. 
 
28 - 
a TO DEPT3HS BFTFEJI 7 AND 9 Ne"Er, OR EVF-N SETWEEN 5 AND 
:S, WHEN ACCOMPANIED BY HIGH WINDS WHICH IS USUALLY THE 
REATE DEEP DRIFTS IN UNPROTECTED SECTIONS OF ROADWAYS; 
L SNOW REMOVAL ORGANIZATIONS SAY THAT DRIFTING CONDITIONS