Gregory J. Brennan, P. HG.
Senior Hydrogeologist/Environmental Planner
Howard R. Green Company
22 South Linn Street
Iowa City, IA 52240
319.337.2858 ext 307
Fax 319.337.2878
gbrennan@hrgreen.com

Ian Coburn
Meter Systems Sales Representative
Davies/Northern Water Works
1694 91ST Avenue NE
Blaine, MN 55449
1-800-844-8334
coburn@rconnect.com

Ron Hembry
Local Manager
Alliance Water Resources
P.O. Box 404
Tipton, IA 52772
563-886-1512
rhembry@netins.net

Eric Lawrence
Development Engineer
USFilter-Memcor
600 Arrasmith Trail
Ames, IA 50010
Tel: 515-268-8522
Fax: 515-233-9445
Cell: 443-253-0043
lawrencee@USFilter.com

James C. Oppelt, P.E.
Howard R. Green Company
4685 Merle Hay Road; Suite 106
Des Moines, Iowa 50310
Phone: 1-515-278-2913
FAX: 1-515-278-1846
joppelt@hrgreen.com 

Jenny Puffer
Des Moines Water Works
puffer@dmww.com 

Brad Roeth
Stanley Consultants
563.264.6321 
roethbrad@stanleygroup.com

Steve Sincox, P.E. (CHAIR)
Director of Engineering
Marshalltown Water Works
P.O. Box 1420
Marshalltown, IA 50158
641-753-7913
steve@marshalltownwater.com

Darin St. Germain, P.E. 
Vice President Sales & Marketing Conventional Products 
600 Arrasmith Trail 
Ames, IA 50010 
Main telephone 515/232-4121 
Direct Telephone 515/268-8546 
FAX 515/232-2571 
mobile 410/336-4083 
stgermaind@usfilter.com 

Andy Venzke, E.I.
Millard Engineering
Office: (515) 232-6597
Cell: (515) 231-6511
avenzke@millardeng.com

Tim Wilson
Supt. Public Works
City of Wahpeton
1201 Dakota Drive
Milford, IA 51351
Phone: 712-337-3522
Fax: 712-337-0339
wahpetonwater@pipeline.com