Culvert Maintainer FAQ
- Certified individuals may maintain, repair, replace, or modify culverts up to a maximum diameter of 48'', or the hydraulic equivalent without prior DES permit
- All maintained culverts must be able to pass flow without causing damage to upstream or downstream properties
- All performed maintenance must be in accordance with NHDOT Best Management Practices for Routine Roadway Maintenance
All certified individuals must file a quarterly report form to DES detailing their maintenance activities for that quarter.
- Municipal or state employees who have successfully completed the Culvert Maintainer Certification and passed the exam.
- NH Licensed Professional Engineers who are employed by or performing services for the state or NH municipalities.
**NH Licensed PE's May Apply For Certification Without Taking The Training Course**
- Work on culverts with a history of overtopping
- Work on double culverts regardless of diameter
- Slip lining or other methods which reduce the diameter of the culvert
For these scenario please file a routine roadway permit BEFORE performing work or contact DES for specific questions and instructions. More information on some roadwork permits may be found here https://www.des.nh.gov/organization/divisions/water/wetlands/permit-roadway-railway-maint.htm