2025 Overholt Drainage School
Monday, March 10 to Thursday, March 14, 2025
The 2025 Virgil Overholt Drainage School will be held at the Ohio State University’s Lima Campus in Lima, Ohio. See below fore important links.
Training Schedule and Topics
Day 1 – Monday, March 10 – 1:30PM to 4:30PM (Registration starts at 12:30PM)
(Day 1 is intended for those who do not have any background in topographic mapping and contour maps. For advanced users, day-1 is optional to attend)
- Topographic mapping basics
- Cover basics of topo mapping, drawing contours by hand
- Work off of grid maps, practice problems etc.
Day 2 – Tuesday, March 11 – 8:30AM (Registration starts at 7:30AM)
- Understanding drainage
- Introduction to drainage design – Planning, information & survey needs, design steps
- Modern ways to collect data for drainage design and installation (Survey, LiDAR, Google Earth), visualizing and reading contours and topographic maps
Day 3 – Wednesday, March 12 – 8AM to 5PM
- Hands-on drainage design problems and exercises
- Selecting drainage coefficient
- Estimating subsurface drain capacity, pipe sizing,
- Economics of drainage, guidance for drainage projects on leased land
Day 4 – Thursday, March 13 – 8AM to 8PM (5PM-8PM is extra time for class project)
- The “art” of designing drainage and conservation drainage: System layouts, tips and tricks for planning and design of systems
- Drainage water management – design and installation considerations: Drainage and Water Quality, Benefits of drainage water management, drainage water recycling, and automation
- Water and Drainage Law
- Safety: Safety of humans and machines at job site, Utilities safety
Day 5 – Friday, March 14 – 8AM to 4PM
- Class project presentations
- Quality Construction, troubleshooting – Presentations by drainage contractors
- Experienced Drainage Contractors panel
- Wrap up – closing remarks – survey