Presented by Jeff Tews, Fleet Operations Manager, City of Milwaukee, on October 23, 2012 at the 3rd Wisconsin Natural Gas for Transportation Roundtable.

1. Milwaukee’s CNG Experience,
1980-Present
City of Milwaukee
Department of Public Works
Operations Division, Fleet Services Section
Tom Barrett, Mayor
Ghassan Korban, Commissioner of Public Works
Preston D. Cole, Director of Operations
Jeffrey A. Tews, CPFP
Fleet Operations Manager

2. Diverse Fleet
 123 different types of equipment, from
aerial lifts to welders
 City of Milwaukee Fleet:
– Diesel units 929 pieces
– Gasoline units 1,670 pieces
– Propane units 138 pieces
– CNG Units 21 Pieces
– Non-Fuel units 995 pieces
 Annual Fuel Use:
– Diesel fuel 1,000,000 gallons/year
– Gasoline 600,000 gallons/year
– Propane 17,000 gallons/year
– CNG 174,000 DGE’s (est)

3. Milwaukee’s CNG Experience
 Three Major Initiatives
 1980: Two Units
 Disappointing
 1992-1994: Seven Units
 Some Improvement
 2010-Present: 21 CNG Refuse Trucks
 Viable, both light and heavy equipment

4. 1980 Initiative
 Two CNG Pickups
 Low power
 Two fills per day maximum
 30 mile range, each truck
 Broke down often

5. 1992-1994 CNG
 Pickups, cars, vans, police cruiser
 All conversions done in-house
 3,000 PSI
 Dual fuel; Switch for CNG/Gas
 Installed “02 Fix” boxes
 Bought fuel from local utility

6. 2010 CNG
 2 Rear-Loading Refuse Packers, late 2010
 320 HP engines, automatic transmissions
 42 DGE under-body mounted tanks (limited range)
 No change in wheelbase or turning diameter

7. 2011 CNG
 6 Side-Loading Refuse Packers, late 2011
 320 HP engines, automatic transmissions
 80 DGE cascade, behind cab
 Extended wheelbase 26”

8. 2011 CNG
 13 Rear-Loading Refuse Packers, early
2012
 320 HP engines, automatic
transmissions
 75 DGE cascade,
front of body
 Extended wheel-
base 26”

9. CNG Fueling Stations
 ARRA Stimulus Grant, $3.8 million for the
construction of two CNG refueling stations
 Fast fill and slow fill capabilities
 Centralized locations
 Public Accessibility
 Lincoln Avenue Facility
(South side)
 Ruby Avenue Facility
(North side)

10. CNG Fueling Stations
 Compressor drives both public and City access
 Dual 250 Hp electric motor driven compressors
 Two 3-stage storage cascades

11. CNG Fueling Stations
 Front – Public Access
 3000 / 3600 PSI
 Credit card access only
 Open 24/7

12. CNG Fueling Stations
 Rear – City Access
 3600 PSI
 Employee card access
 RFID or Mag-Stripe

13. CNG Fueling Stations
 Slow-Fill
 16 Vehicles
 Block Heaters
 Sequential Fill

14.  Summary
 21 Heavy Duty CNG Vehicles in Service
 Continually Expanding (3 CNG cars on order)
 Light and Heavy Vehicles
 Utility Vehicles
Thank You!