Wettable/Irrigated Acreage Determination Training

Who Should Attend | Upcoming Workshop Dates | Registration Info |
Course Schedule | Instructor | Professional Development Hours


About the Workshop

This training will show you how to determine “wettable acres” as required in certified animal waste management plans. Application may also be pertinent to other regulatory agencies such as the Division of Waste Management – Solid Waste. The training will include history and background from which technical guidance is derived, classroom presentation of steps and procedures to complete wettable acres field worksheets, and hands on demonstration of waste application equipment. The training will focus on new and expanded systems wettable acres determination. The training will culminate with an exam (optional) which upon successful completion will certify the examinee the Wettable Acres (WA) technical specialist designation.

Who Should Attend

This course is recommended for the following groups of individuals:

  • Technical Service Providers
  • NRCS employees
  • Animal waste regulators
  • Technical staff from corporations associated with swine production
  • Professional Engineers
  • NC Cooperative Extension agents
  • Division of Soil & Water Conservation Staffs

Upcoming Workshop Dates


No upcoming workshops scheduled at this time.

Registration Information


Regular Fee – $120.00 ($95.00 Early Bird Registration)

NC Cooperative Extension Agent Fee – $40.00

Payment Instructions

We accept Visa, Mastercard, and American Express for payment of your registration fee. Or you may send us a check made payable to NCSU – BAE. Mail to:

Campus Box 7625
Raleigh, NC 27695
Attn: Garry Grabow

Cancellation and Refund Policy

Cancellation requests should be sent to bae_training@ncsu.edu for processing. The cancellation request must be submitted at least twenty-one (21) days before the date of the workshop to receive a full refund. Cancellation requests made between twenty-one (21) day and seven (7) days before the date of the workshop will receive a full refund minus a $25 administrative processing fee. Any cancellation requests made within seven (7) days of the workshop will be ineligible for refund. Attendee substitutions from within the same company may be made at any time at no cost. Please send an email to bae_training@ncsu.edu requesting a substitution.

Severe Weather Cancellation and Refund Policy

In the event of severe weather, this workshop may be postponed or cancelled at the discretion of the workshop instructors and coordinators. If the workshop is postponed, you may receive a refund if you are unable to attend the newly scheduled date, time, and location. Please contact bae_training@ncsu.edu if you are unable to attend the re-scheduled workshop. If the workshop is cancelled, you will receive a full refund. If the workshop is postponed or cancelled, the workshop instructors and coordination staff are not responsible for participants not meeting their PDHs or CEUs requirements with their various professional licensing boards.

Course Schedule

Below is a sample schedule of the workshop to demonstrate the topics that will be covered. Actual schedules may vary from class to class.

7:30 am Registration
8:00 am
  • Definitions and History of Wettable Acreage Determination
  • Applicable Rules and Guidance (SB1217)
  • Wettable Acrage Determination of Traveling Systems (Definitions and Procedures)
  • Wettable Acreage Determination for Stationary Systems (Definitions and Procedures)
9:45 am Break
10:00 am Field Exercise and Case Study for Traveling Systems
12:15 pm Lunch (on-site)
1:00 pm
  • Case Study Stationary Systems
  • Special Cases (Spreaders)
  • Pre-Exam Review and Questions
3:45 pm Open Book Exam
4:45 pm Adjourn

Our Instructor

Garry L. Grabow, Ph.D., P.E.

Dr. Grabow has expertise in land application of animal and industrial wastewater, irrigation systems and irrigation water management, and water quality monitoring. He provides training to operators of animal waste systems and operators of surface irrigation systems for land application of waste, and also to certified irrigation contractors.

Dr. Grabow’s research interests include irrigation water management, land application of waste and water quality impacts of various land application systems. Grabow is involved in applied research projects that are evaluating the effectiveness of several different “smart” irrigation technologies in turfgrass in both research and homeowner settings. He is also involved in a study that is evaluation the effectiveness of chlorination technologies to disinfect irrigation water for use on fresh produce. He has also led research in subsurface irrigation systems for use in both freshwater and wastewater applications.

Professional Development Hours

The following professional development hours (PDHs) are awarded after successful completion of the workshop:

  • 6 PDHs for professional engineers and land surveyors (approved by the NC Board of Examiners for Professional Engineers and Land Surveyors)
  • 6 PDHs for Wastewater (Surface) Operators
  • 6 PDHs for Animal Waste System Operators
  • Other professionals may appeal to their respective boards to obtain professional education credits.