Roeder Avenue Bridge Construction Administration

Roeder Avenue Bridge Construction Administration City of Bellingham

Central Avenue Improvements

Central Avenue Improvements City of Bellingham

Inspection, Load Rating and Bridge Rehabilitation

Inspection, Load Rating and Bridge Rehabilitation City of Bellingham

Old 99 (Riverside Drive) Improvements

Old 99 (Riverside Drive) Improvements Cities of Mount Vernon & Burlington

I-405 South Bellevue Design/Build Project

I-405 South Bellevue Design/Build Project WSDOT

Middle Fork Bridge Rehabilitation Construction

Middle Fork Bridge Rehabilitation and Construction Management, City of Bellingham

  • Sound Transit Lakewood Layover Yard

    Friday, 23 September 2011 00:00
  • Broadway Avenue Bridge Replacement

    Thursday, 22 September 2011 00:00
  • Roeder Avenue Bridge Construction Administration

    Thursday, 15 September 2011 06:46
  • Central Avenue Improvements

    Thursday, 15 September 2011 06:40
  • Inspection, Load Rating and Bridge Rehabilitation

    Thursday, 15 September 2011 04:29
  • Old 99 (Riverside Drive) Improvements

    Thursday, 15 September 2011 03:55
  • I-405 South Bellevue Design/Build Project

    Thursday, 15 September 2011 03:47
  • Middle Fork Bridge Rehabilitation Construction

    Thursday, 15 September 2011 03:22

Lundeen Parkway Extension Bridge*

Lundeen Parkway Extension Bridge
Snohomish County

TranTech engineers, Kash Nikzad and Theo Trochalakis were the Project Manager and Senior Structural Engineer on this project. The Lundeen Bridge is a part of a 2,750-meter-long extension and improvement of the Lundeen Parkway in Snohomish County. The project widens the roadway to a 4-lane facility that extends between SR9 and SR 204 with Class 2 bike lanes and sidewalks on both sides. The roadway crosses a steep ravine. One of the responsibilities was to prepare PS&E documents for the bridge that carries Lundeen Parkway over the ravine. The single-span bridge is approximately 53 meters long (i.e 174 feet) and 15.5 meters wide (i.e. 51 feet). The bridge’s superstructure is composed of five steel plate girders that are 7-feet deep spaced at 3.1 meters (i.e. 10 feet) and made composite with an 8 1/2-inch cast-in-place deck. The substructure is composed of abutments founded on 4-foot diameter drilled shafts that extend 70 feet below existing ground line. The top layer of soil in the ravine is composed of fill/loosed material. Both engineers worked closely with the County’s in-house geotechnical experts to solve this issue by using Control Density Fill at the abutment locations. The abutments are intentionally designed wider (i.e. 70 feet) for future Parkway widening considerations.

 

 
Services

TranTech Bridge Projects Requiring Overcrossing BNSF Railway Tracks

Structural Engineering:
TranTech's structural engineering group provides comprehensive services for structural design of bridges; highways and other industrial facilities. We also provide services in the areas of seismic retrofit, structural condition inspection and load rating of bridges.

Civil Engineering:
TranTech’s civil engineers provide comprehensive services for roadway design; drainage & stormwater treatment; traffic signals and illumination design.

Construction Management:
TranTech’s construction administration team provides services in the areas of contract administration, construction inspection and materials testing coordination and management, resident engineering, contractor work coordination.