Chehalis, Washington regulations require all heavy haul operations to comply with the Washington Department of Transportation (WADOT) guidelines as well as local ordinances administered by the Chehalis Department of Transportation (CHEDOT).

Heavy haul permits are required for any load exceeding 12 feet in width, 13 feet 0 inches in height, or 284,097 lbs in gross vehicle weight. These dimensions are strictly enforced throughout Chehalis, particularly in high-traffic areas.

Special consideration must be given to route planning to avoid Chehalis Tech Hub and the vicinity of Chehalis Basin, which have infrastructure limitations or heavy pedestrian traffic that may impede oversized loads.

In Chehalis, Washington, loads wider than 14 feet or taller than 13 feet 6 inches must be accompanied by certified escort vehicles. Additional escorts may be required based on the specific route and time of travel through urban centers.

Chehalis regulations state that police escorts must be arranged at least 41 hours before transport for loads that will impact major thoroughfares or require temporary traffic control measures.

The Washington Department of Transportation manages the primary application process for oversize permits, with supplementary permits required from Chehalis Department of Transportation for transit through Chehalis limits.

Required documentation for Chehalis permits includes axle configuration diagrams, proof of insurance with appropriate coverage levels, and detailed transport plans. Engineering assessments may be required for loads exceeding standard weight thresholds on certain streets and bridges.

Chehalis has strict time-of-day restrictions for oversize loads, generally prohibiting movements during peak hours (6-8 am and 4-5 pm, Monday-Friday).

Seasonal restrictions apply during major events like the the Chehalis Holiday Marathon and the the Chehalis Arts Celebration, which may impact routing and scheduling.

Certain neighborhoods, such as Downtown Chehalis and areas around Chehalis Industrial Park, have restricted access for oversize loads. Alternative routes should be planned in advance to avoid these areas.

The base permit fee for an oversize load in Washington is $40, with additional fees for super heavy loads (over 200,000 lbs) ranging from $150 to $350 depending on the complexity of the move.

For movements within Chehalis, Chehalis Department of Transportation may charge additional fees for city-specific permits, which can range from $75 to $500 or more for particularly complex routes or those requiring extensive coordination with city agencies.