Bridge safety inspection guidance
Manuals
- MnDOT Bridge and Structure Inspection Program Manual (PDF)
- MnDOT Bridge Inspection Field Manual - 2025 (PDF)
- National Bridge Inspection Standards - 2022 (PDF)
- FHWA Specifications for the National Bridge Inventory - March 2024 (PDF)
- FHWA Bridge Inspector's Reference Manual - 2023
- FHWA Culvert Inspection Manual - 1986 (PDF)
- FHWA Tunnel Operations, Maintenance, Inspection, and Evaluation Manual - July 2015 (PDF)
- FHWA Specifications for the National Tunnel Inventory - July 2015 (PDF)
Timber bridge inspection and maintenance
- Advanced timber inspection equipment online request form
- USFS Timber Bridge Manual - 1992
- Minnesota Advanced Timber Bridge Inspection Manual & Supplement – 2025 (PDF)
- Minnesota Timber Bridge Repair Manual - 2015
- Cost effective repairs of timber bridges video (YouTube)
- Timber bridge inspection: Stress wave timer demonstration video (YouTube)
- Timber bridge inspection: Resistance microdrilling demonstration video (YouTube)
- Timber research project summary (PDF)
Forms
- Painted square foot calculator (Excel)
- Program Administrator Checklist (PDF) - Updated 2026
- Program Administrator Appointment Form
Training and certification
- MnDOT bridge safety inspection certification 38933316 (PDF)
- Field proficiency test application form (PDF)
- Bridge Safety Inspection Refresher Training
- Upcoming training opportunities
2026 Bridge Safety Refresher Seminar presentations
- 2026 Bridge Inspection Refresher Handout
- 2026 State Bridge Inspection Update
- 2026 SNBI Data Collection for Culverts
- 2026 State Aid Timber Bridge Inspection
- 2025 Critical Findings
- 2025 NBIS Compliance Reviews
- Element 900 - Protected Species
- Underwater Inspections Update
- MnDOT’s NSTM Inspection Program
- SNBI Bridge Inspections