Deviations from Washington StateDepartment of Transportation (WSDOT) standards required approval. The minimum diameter forconstruction is anticipated to be 50 feet, which allows for construction tolerances in boring the tunnel.Assuming a 24-inch-thick tunnel lining, the outside diameter (OD) would be...
state highways within their respective incorporated city and town limits. The RCW also requires those cities and towns to adopt standards for access permitting on managed access state highways that meet or exceed WSDOT standards, provided those adopted standards are consistent with WSDOT standards....
Deviations from Washington StateDepartment of Transportation (WSDOT) standards required approval. The minimum diameter forconstruction is anticipated to be 50 feet, which allows for construction tolerances in boring the tunnel.Assuming a 24-inch-thick tunnel lining, the outside diameter (OD) would be...