This course provides information on the importance of regular and preventive maintenance, along with maintenance procedures for highway culverts. Among the most critical responsibilities of maintenance personnel is the upkeep and repair of the highway drainage system. This system plays a vital role in preventing water damage to the road surface by controlling or directing the flow of water over, under, or beside the roadway. Neglecting drainage maintenance can significantly reduce road serviceability or even render it impassable. Culvert and appurtenant structure maintenance can be categorized into routine, preventive, and emergency maintenance. Routine drainage maintenance is planned work that ensures all parts of the drainage system receive regular attention. Preventive maintenance addresses specific problems before they worsen, though it is not on a regular schedule. Emergency drainage maintenance involves tasks resulting from storms, floods, or unforeseen conditions, aiming to restore the structural integrity or hydraulic capacity of the culvert. Key Topics: • Routine, Preventive, and Emergency Maintenance Procedures • Benefits of Regular Maintenance • Costs and Legal Implications • Culvert Inspection Programs • Debris Removal • Flushing and Sedimentation Removal • Thawing, Cleaning, Repair • Streambed Maintenance • Scour Hole Repair • Vegetative Control Publication Source: US FHWA