Materials Lab services

› View a list of all our services (30KB Word .doc)

A Road Services mobile lab engineer measures concrete unit weight and air content.
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Geotechnical engineering and materials testing services

The Road Services Materials Lab provides geotechnical engineering and materials testing services throughout the life of a project. Our geotechnical design responsibilities range from small foundation design problems to bridge replacement projects, landslide analyses and pavement design, and rehabilitation. Typically, preliminary geotechnical investigations are completed during project planning to assist with feasibility studies and site selection. Our office maintains an on-call drilling contract that allows us to rapidly respond to emergencies, utilizing a variety of drilling techniques as necessary to characterize the soil and groundwater conditions and provide prompt recommendations.

Initial design phase services

Initial design phase services include subsurface exploration, instrumentation installation and monitoring, field and laboratory testing, development of design recommendations and construction specifications, and review of reports completed by contract geotechnical consultants. During final design, project documents are reviewed to evaluate suitability for construction, verify appropriate incorporation of geotechnical recommendations, and to assist in the development of construction quality control programs.

Road Services density engineers explain test results to a contractor (left) on the York Bridge replacement project.
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Construction phase services

Construction phase services include responding to unanticipated geotechnical conditions, implementation of quality control inspection, material sampling and testing programs, as well as review, approval and tracking of contractor submittals. Occasionally, after a project is in service, the Material Lab's involvement continues for long-term monitoring, performance evaluations or forensic investigations.

Long-term geotechnical monitoring

Currently, Materials Lab personnel are performing geotechnical long-term monitoring of 30 critical sites within King County. View a detailed listing (30KB Word .doc) of our service offerings.

Mobile laboratories for field and laboratory testing

A mobile lab engineer "rods" a concrete test cylinder.
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The Road Services' Materials Lab is well equipped to perform field and laboratory testing on a wide variety of materials such as native soils, select imported fill materials, aggregates, concrete and asphalt. Sampling and testing is frequently conducted from our Mobile Laboratories either at the project site or material source in order to provide test results on an expedited basis. In addition, we have existing subcontracts in-place allowing us to secure services from other public and private agencies should unanticipated conditions arise during construction that require unusual or unique testing capabilities.

Utilization of the Materials Lab on the project management team will eliminate the need to advertise a request for proposals and administer a subcontract for private geotechnical monitoring and materials testing services.

Reporting

All of our field and laboratory reports are computer generated. Field personnel are supplied with laptop computers and printers, allowing them to submit reports at the end of each day prior to leaving the site. Our reporting formats have been developed internally and include all the information required by specific test standards. Reports are concise, reference-specified requirements and specifically address whether construction methods or materials are in compliance.

A lab engineer tests asphalt content using the NCAT ignition furnace.
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Meet us and tour our laboratory

A meeting with our key project personnel and a tour of our Laboratory can be scheduled at your convenience. Should you have questions or desire additional information, please contact Alan Corwin, P.E. (206-296-7711) or Lydia Reynolds-Jones (206-296-8210). We appreciate your consideration and welcome the opportunity to offer our professional services on your next project.

Contact us

Alan Corwin, P.E.
King County Road Services Materials Lab, Bldg D
155 Monroe Ave NE
Renton, WA 98056
206-296-77110
206-296-7719 (fax)