Pipe Corrosion Zones and Pipe Alternative Selection
Once a PEO has determined the pipe classification needed for an application, the next step is to ensure that […]
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Hydraulics
Various types of drainage facilities are required to protect the highway against surface and subsurface water. Drainage facilities must be designed to convey the water across, along, or away from the highway in the most economical, efficient, and safe manner without damaging the highway or adjacent property. The purpose of this manual is to provide detailed information on the subjects of hydrologic and hydraulic analysis related to highway design. This manual should be used in conjunction with the Washington State Department of Transportation (WSDOT) Highway Runoff Manual and the WSDOT Design Manual, specifically Section 1210.
Pipe Materials
Several pipe materials are acceptable to WSDOT, depending on the pipe classification (see the Standard Specifications). WSDOT’s policy is to
Structural Analysis and Fill Height Tables
The State Hydraulics Office, using currently accepted design methodologies, has performed a structural analysis for the various types of pipe
Abandoned Pipe Guidelines
8-11 Abandoned Pipe Guidelines Abandoned pipes shall be removed, plugged per Standard Specification 7-08.3(4), or filled with controlled-density fill (CDF)
Pipe Design
This section presents pipe design alternatives. 8-10.1 Categories of Structural Materials: Rigid or Flexible Based upon material type, pipes can
Trenchless Techniques for Pipe Rehabilitation
Several rehabilitation methods are available that can restore structural integrity to the pipe system while minimally affecting roadway traffic. As
Pipe Rehabilitation: Trenchless Technology
Deteriorated pipes can affect the pipes’ structural integrity and lead to roadway failures and development of sinkholes. Pipe deterioration could
Pipe Classifications
This section examines the five primary categories of pipes used in WSDOT projects: drain pipe, underdrain pipe, culvert pipe, storm
Introduction to Pipe Classifications and Materials
WSDOT uses several types of pipe for highway construction activities. To simplify contract plan and specification preparation, pipes have been
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