IMMAG - Iowa Manure Management Action Group

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(515) 294-9590 or e-mail

June 2011 IMMAG Update

Welcome to the monthly update for the Iowa Manure Management Action Group (IMMAG) Web site. This update is provided as a service to inform you about changes made to the IMMAG Web Page or items of interest dealing with manure management and air quality from animal feeding operations. If you wish to subscribe to this mailing please click here. You may also view this update with direct links on the CURRENT NEWS site on IMMAG.



Follow iowamanure on Twitter The Current News page on the IMMAG site is updated weekly. Follow the Iowa Manure Management Action Group on Twitter at @iowamanure.

There are many manure related events planned for this summer. These events are a great way to learn about regulatory issues, see how research is done to measure air quality parameters or just to hone your manure management skills.


The IMMAG Events page is a compilation of manure management related events. Please check the events page often for new listings.

June 15.  The Iowa Learning Farms is hosting a webinar "Fate and Transport of Pathogens from Agricultural Landscapes." The webinar starts at noon. For more information please see: If you miss the live program you can watch the archived webcast at a later time.

June 22. Mono-Slope Beef Barn Open House and Air Emissions Tour, Royal, Iowa. Iowa State University, in cooperation with the Agricultural and Biosystems Engineering Department at South Dakota State University and the USDA Meat Animal Research Center at Clay Center, Nebraska are hosting a Mono-Slope Beef Barn Open House from 10 a.m. to 3 p.m. The objective of this open house is to highlight the on-going research on collecting base-line data for gases and dust emitted from mono-slope barns. The event is free, but we ask that you please register so we can adequately prepare for lunch. Please register by June 15. For more details about the open house and access to a registration form please click here.

June 24 at 1:30 p.m. central. The next LPELC webinar is titled "Improving Implementation of Nutrient Management Plans". Click here for more information. 

Iowa State University Extension is hosting four workshops for livestock operations that might be considered medium-size Concentrated Animal Feeding Operations (CAFOs). Recent EPA activities in Iowa have prompted us to coordinate these workshops as informational meetings for livestock producers. Medium CAFO status primarily applies to concentrated open lot animals of any species that meets a certain size requirement and discharge criteria. For example, size thresholds include 200-699 mature milk cows or 300-999 beef cattle or immature dairy heifers.

If you meet the size threshold, you are defined as a CAFO if: 1) you discharge pollutants to waters of the United States (typically lakes, streams or wetlands) by direct contact of the animals with the waters or 2) by discharge through a man-made ditch, flushing system, or similar man-made device (Note this discharge can also include any feedlot runoff, silage runoff or milkhouse wastewater, no matter how dilute or how far it travels).

For more information including a table that shows threshold size for number of animals and discharge criteria as well as a printable registration form, please see

Registration is $30 for individuals and the first person from each livestock operation and $15 for each additional person from the same livestock operation.  Pre-registration is required, but payment can be made the door. Workshops begin at 10 a.m. and will end by 3 p.m.

June 27. Room 115 at the NICC Dairy Center, Calmar. Please contact the Winneshiek County Extension office at 563-382-2949 to register.

June 28. Country Junction Restaurant, Dyersville. Please contact the Dubuque County Extension Office at 563-583-6496 to register.

June 29. Buzzy’s Restaurant, Welton. Please contact the Clinton County Extension office at 563-659-5125 to register.

June 30 Moose Lodge in Charles City. Please contact the Floyd County Extension office at 641-228-1453 to register. 

On July 13 Iowa State University Extension and the Iowa Beef Center are hosting a manure field day at the Mike Bettin feedlot in Sac County. The address is 3087 Hwy 71 and this is the north feedlot.  The purpose of this field day is to share information and offer some alternative manure handling options with open feedlots and dairy operations with less than 1,000 animal units. This field day will feature ISU staff discussing how livestock operations are defined as medium-size Concentrated Animal Feeding Operations, a manure effluent pumping demonstration and some tips on calibrating manure spreaders to achieve the correct application rate. Cost-share and technical assistance opportunities will also be discussed. The field day starts at 1 p.m. Please watch the IMMAG events page as more information will be posted soon.

Don’t forget the North America Manure Handling Expo in Norfolk, NE on July 20. This promises to be a large and dynamic event with multiple workshops, demonstrations, vendor booths and other activities. This is a great place for commercial applicators and livestock producers to see the latest in equipment and technology. I hope to see you there!

Link to Expo Web Site

ISU Extension, IMMAG and NRCS are offering an Introductory RUSLE2 and Iowa P Index workshop on July 26 at the Polk County Extension office. Registration for this workshop is open. Click here for more information.

Best Wishes,

Angela Rieck-Hinz
2104 Agronomy Hall
Iowa State University
Ames, IA 50011
(515) 294-9590
Iowa Manure Management Action Group

Manure sampling - Click on photo to enlarge

Manure sampling.


Newest IMMAG update available.