Expectations. Anti-Icing. Melting vs Bond Prevention. Advanced Anti-Icing. Our experiences Equipment Costs Results Challenges Questions

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1 Expectations Advanced Anti-Icing Our experiences Equipment Costs Results Challenges Questions Mark DeVries, McHenry County, Illinois DOT & Bret Hodne- City of West Des Moines DE-ICING Anti-Icing Anti-Icing is a proactive approach of preventing the formation of bonded snow and ice. Melting vs Bond Prevention

2 Bonding Prevention ANTI-ICING PICTURES Economic Impact of a One day shutdown of the Iowa Highway System 70 Millions of dollars State Taxes Federal taxes Retail Sales Wages Iowa DOT Winter Budget Equipment 10 0 Brine makers

3 St. Cloud, MN 500 GALLON SLIDE IN UNIT TANDEM AXLE SLIDE IN UNITS MCHENRY COUNTY CITY OF MILWAUKEE

4 COMBINATION VEHICLE McHenry County Concept Vehicle Flow boy trailer 16 ton dry material 2,700 gallons liquid Trailer Mounted Unit

5 Nozzle Designs (VO)

6 BRINE PRODUCTION Controllers Operations THE MCHENRY COUNTY DIVISION OF TRANSPORTATION (MCDOT) APPLIES LIQUIDS DIRECTLY TO THE SALT ON BOARD EACH TRUCK (PRE-WETTING) AND DIRECTLY TO THE PAVEMENT PRIOR TO EACH EVENT (ANTI ICING) AS SHOWN BELOW. PRE-WETTING ANTI-ICING ICING Application rates and guides WEATHER FORECASTING Salt Brine - 50 gallons per lane mile Calcium/Mag Chloride - 30 gal ln/mile Supermix 40 gallons per lane mile Pavement temperature 15 degrees and rising Dew point more than 2 degrees apart Winds more than 15 mph when loose snow is present Weather forecast/frost predicition is trigger for application Storm Logic/MDSS

7 Weather Forecasting Tools RWIS MDSS NOAA Internet/ s Private Weather Service Radio/TV National Weather Service Local Police/Sheriff

8 Forecast Consultation is the Key! What s New! Los Alamos Detroit Evansville Aurora West Des Moines Canton Ohio ODOT MCHENRY COUNTY DIVISION OF TRANSPORTATION (MCDOT) DEVELOPED A METHOD TO BLEND LIQUID DE-ICING CHEMICALS TOGETHER PRECISELY SO WHAT IS THIS SYSTEM WE BUILT? LIQUID CHEMICALS USED BY MCDOT SALT BRINE CALCIUM CHLORIDE DE-ICE 55 (GEO-MELT) Very low cost Dries quickly Very effective at pavement temperatures above 20 F Readily available Fairly low cost Very effective at low temperatures Exothermic Effective at low temperatures Good residual effect Non-Chloride Inhibitor THE BLENDING SYSTEM COMBINES THE THREE CHEMICALS IN PRECISE AMOUNTS

9 OUR FIRST CONCEPT DRAWING WHEN COMBINING CHEMICALS THERE ARE FACTORS YOU MUST CONSIDER HOW DO THE CHEMICALS REACT WHAT % OF EACH CHEMICAL CAN BE MIXED TOGETHER HOW DO YOU ACCOMPLISH PRECISION BLENDING SUPER MIX TODAY S SYSTEM IN PLACE Components Salt Brine 85% Calcium Chloride 5% De-Ice 55 10% Salt Brine

10 SUPER MIX PERFORMANCE Pre-wet applications Feb. 4-5, PAVEMENT TEMP. 2 MIX WORKING Calcium Chloride Usage ,500 gal ,700 gal Cost Savings $7,770 Salt Brine Costs cents per gal cents per gal Cost Savings $9930 PROVEN SUCCESS From its conception, the blending system and the results MCDOT has documented have been shared throughout America. The System has been the focus of many seminars including: APWA North America Snow Conference APWA Congress APWA Chicago Metro Chapter Snow Workshop University of Wisconsin Managing Snow Operations Course Numerous local seminars A SUNDAY MORNING, PAVEMENT TEMP. 3-6 DEGREES AT 7AM WET PAVEMENT In addition, the system was a featured article in the APWA Reporter. Cost Comparisons COSTS - MCDOT Mag Chloride Salt Brine $.65/gallon $.05/gallon 30 gal/lane mile 50 gal/lane mile $19.50 /lane mile $2.50/lane mile 500 miles = $ miles = $1250 This is what we figured on our usage per 100: 85% Salt Brine = 85 x.05 = $ % De-Ice 55 = 10 x 2.06 = $ % Calcium Chloride = 5 x.43 = $2.15 The grand total per 100 = $ per gallon SEASON TOTALS LOCAL, REGIONAL AND NATIONAL SIGNIFICANCE 44 CALLOUTS TO DATE 8, TONS OF SALT APPLIED 109,212 GALLONS APPLIED 55,961 PRE-WET 6.96 GALLONS PER TON APPLIED 53,251 ANTI-ICING 92, GALLONS OF BRINE 10, GALLONS OF GEO-MELT 5, GALLONS OF CALCIUM TOTAL $ SPENT ON LIQUIDS = $29, This new SuperMix really seems to be keeping the curves and hills from becoming as ice covered as in past storms. On some of the area roads which are typically not plowed or driven as frequently, we have noticed that the ice and snow does not build up as fast and cars are able to maintain traction easier. I believe this new procedure is definitely going to enhance driver safety. Capt. Glenn Olson McHenry County Sheriff s Department This out of the box thinking has brought notoriety for this innovative process, enhanced our operation, and holds great promise for the snow removal industry.

11 Computerized System MDSS Calculation for Making CaCl2-Brine-Geomelt Blends CaCl2 Density Chart NaCl Density Chart Geomelt Density Chart Make entries in yellow cells only; calculated results are in grey cells wt % lbs/gal wt % lbs/gal wt % lbs/gal Blend Liquid CaCl2 with NaCl Brine Enter brine concentration (%): Brine density (lbs/gal): Enter brine wt% in blend (%): 83.0% Enter Geomelt concentration (%): Geomelt density (lbs/gal): Enter Geomelt wt% in blend (%): 12.0% Enter CaCl2 concentration to blend (%): CaCl2 density (lbs/gal): Enter CaCl2 wt% in blend (%): 5.0% Enter desired volume of blend (gal): 5, Enter final blend density (lbs/gal): Gallons to blend together Gallons NaCl brine (gals): 4, Geomelt (gals): CaCl2 solution (gals): This information is considered accurate and reliable as of /04/2005 and is presented in good faith. Because use conditions and applicable laws may differ from one location to another and may change with time, Recipient is responsible for determining whether the information in this document is appropriate for recipient s use. Since Dow has no control over how this information may be ultimately used, all liability is expressly disclaimed and Dow assumes no obligation or liability therefore. No warranty, express or implied, is given nor is freedom from any patent owned by The Dow Chemical Company or others to be inferred. Results

12 AN ICY BRIDGE PRO-ACTIVE TREATMENT PRIOR TO AN EVENT Salt Brine 24 Hours After Application Salt Brine 48 Hours After Application SUPERMIX - AFTER ONE WEEK RESIDUAL EFFECT AFTER AN EVENT CARY DEERPASS RANDALL

13 Ten Year Trend (Hours) Challenges Hours FY 96 FY 97 FY 98 FY 99 FY 00 FY 01 FY 02 FY 03 FY 04 FY 05 Phase 1 Phase 2 Overtime Sorting things out Chemicals Equipment Data/Results Testimonials Etc. Etc. Etc. Deicer Evaluation Process 1. Pre-qualification Product literature Phase Diagrams MSDS Sheet Chemical Composition 1-gallon or 5 pound sample for analysis 2. Independent Lab Test (proposed) Chemical composition Environmental impact Friction test Drying time Performance test- (penetration, melting, undercutting) Fall-Out 3. Operational test Suitable location Suitable equipment Documentation to measure control from test

14 Agricultural based corrosion inhibitor added to Calcium Chloride without proper agitation Winter Maintenance Sub-Committee Out in the Field Just Remember To always! Think BIG!

15 And remember It could always be worse! THANK YOU! Mark DeVries McHenry County Highway Dept. (815) il.us Bret Hodne West Des Moines (515)