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