CDOT’s Winter Maintenance Strategy
Dec 30, 2015
CDOT’s Winter Maintenance Strategy
CDOT deicer program
• Colorado• CDOT• History of our program• Our evolution• Situation today
Colorado
• Between 37th and 41st parallels• 104,247 square miles• 40% high plains - 60% mountains• Average Elevation 6,800’ • low point 3,350’• 54 peaks > 14,000’• Low humidity• Thin atmosphere• Huge influence from solar
radiation• Vast temperature swings• Snow falls range from < 20” to
>300” annually
Colorado
• 23,000 lane miles• 24 hour coverage• 14 hour coverage
• 900 plow units• 3000 CDOT employees• 1500 plow drivers• 12 hour shifts• No contracted snow removal• Some cities plow minor routes in
their city
CDOT’s Winter Maintenance Strategy
Evolution
Salt / Sand program
PM 10 issues
Sedimentation in mountain streams
Governor
History
0 5 10 15 20 25 30 35
-80
-60
-40
-20
0
20
40
Solution Freezing Point Curves
% MgCl2
% NaCl
% CaCl2
Concentration of Brine (weight%)
Te
mp
era
ture
F
Situation Today
FY 14 Budget vs FY 14 Spend
Material usage
Technology
LOS
Winter ‘13 – ‘14
FY 14 Budget - $60,402,000
FY 14 Spend - $72,215,000
Material usageSection Description Quantity UOM Total Cost
Statewide Calcium Chloride, 50# 41.00 BAG $415.54
Statewide Calcium Chloride, 50# 367.55 BAG $6,116.63
Statewide SALT, ROAD 50# 6,519.00 BAG $25,490.39
Statewide Abrasive Non-Sanding 7,749.11 TON $64,066.83
Statewide Abrasive Non-Mixed for Sanding 2,808.50 TON $44,667.83
Statewide SALT-SAND MIX 18,306.94 TON $550,970.86
Statewide Liquid Deicer 254,308.10 GLL $165,553.71
Statewide ICE SLICER RS 40,345.34 TON $3,974,021.61
Statewide LIQUID DEICER SPECIAL (Liquid+Salt-Sand) 5,144.50 TON $98,044.40
Statewide Caliber 1000 14,400.00 GLL $11,784.00
Statewide APEX, LIQUID DEICER 8,822,724.70 GLL $7,323,932.29
Statewide SAND SLICER 163,606.12 TON $4,555,557.25
Statewide ICE SLICER SB 8.00 TON $861.46
Statewide RAPID THAW 23.25 TON $2,495.21
Statewide CALIBER M-2000 15,726.00 GLL $15,557.06
Statewide ICE BAN 305 2,654,557.00 GLL $2,075,344.02
Statewide LIQUID DEICER SPECIAL (PRE-MIX) 3,774.03 TON $63,006.97
Statewide Salt Brine, Gallon 600,264.60 GLL $326,849.50
Statewide Solar Qwicksalt 1,167.25 TON $100,058.24
Statewide Ice-Melt, Snow, Ice, Sidewalk, 50#, -25F 195.00 BAG $3,892.00
Statewide SOS-TM, LIQUID DEICER, MAG CLORIDE 26% 24,156.00 GLL $29,112.58$19,437,798.38
Technology
Level of Service(LOS)
Level of Service (LOS)
Re-cap
David C. Wieder, P.E.Staff Maintenance ManagerColorado Department of Transportation15285 South Golden Road, Building #45Golden, CO 80403
Office (303) 512-5502Mobile (303) 548-5853
Questions / Contact Information