CFAES Give Today
Agronomic Crops Network

Ohio State University Extension


Overholt Drainage School-Session 2

Mar 18, 2015 through Mar 19, 2015, 1:00pm - 9:00pm
Defiance County EMA Building, State Route 15, Defiance, OH
Larry Brown

SESSION 2. Drainage Water Management: Controlled Drainage System Purpose, Benefits, Design, Layout and Installation

Overholt Drainage School


Program Objective:

Provide continuing education for land improvement contractors, soil and water conservation technicians, farmers, engineers, consultants, sanitarians, and others interested in advancing their knowledge of basic concepts, principles, and skills related to the purpose, design, layout, construction, and management of Soil and Water Conservation Systems, with emphasis on Water Management and Water Quality. 


include Land-Grant University Faculty/Staff, NRCS/ODNR/SWCD engineers and technicians, ARS engineers and scientists, and experienced OLICA contractors and associates.

SESSION 2 Drainage Water Management: Controlled Drainage System Purpose, Benefits, Design, Layout and Installation
March 18-19, 1 1/2 days
Wednesday 1:30+ to 9:00 PM
Thursday 8:00 AM to 9:00 PM

  • Concepts/Background
  • Issues with Nitrogen and Phosphorus
  • Benefits for Water Quality and Crop Yields
  • Controlled Drainage Design
  • Laterals and Mains
  • Design Problems, Layout
  • Installation, Operation and Management
  • Drainage Collection/Pumping
  • Related Practices and Applications
  • Drain Spacing/Depth Alternatives
  • Outlets, Buffers with Controlled Drainage
  • Wood-Chip Bioreactors, Phosphorus Filters
  • Drainage Water Harvesting for Agricultural Water Supply

Session 2 - Extensive classroom instruction and presentations, day time and evening work sessions and programs. Completion of a subsurface drainage design educational program is essential for all, but required for contractors.


Register for full 5-day program or individual sessions. Please complete registration form and submit with payment before March 9. Call for availability after March 9. Contact Dr. Brown at 1-614-292-3826; or email


Full-Program Registration (Includes All Three Sessions) March 16-20 (5 Days)  $635


Individual Sessions Registration

SESSION 1, Agricultural Subsurface Drainage Design, Layout, Drainage Installation March 16-18 $450

SESSION 2, Drainage Water Management: Controlled Drainage System Design and Installation March 18-19 $300

SESSION 3, Concepts Water Table Management w/Subirrigation: Aspects Design, Installation/Management March 20 $200

Sponsored by:

Overholt Drainage Education and Research Program, Food, Agricultural and Biological Engineering, OSU Extension, OARDC, The Ohio State University, in cooperation with USDA-NRCS, USDA-ARS, Soil and Water Conservation Districts, Defiance SWCD, Ohio Land Improvement Contractors and Associates