Surveying

The success of each design project depends on the accuracy of our information. Perteet surveyors use cutting-edge survey instruments, highly efficient robotic total stations, electronic data collectors, GPS satellite receivers, electronic levels, and full-featured surveying and mapping CAD workstations.

Perteet is part of a Leica-sponsored cooperative CORS (Continuously Operating Reference Station) "Spider" network, allowing real-time access to network solution GPS signals throughout the Puget Sound area. We have installed a base-station on the roof our Everett and Snoqualmie offices, and data from these and eight other sites is fed to a central computer system. Real-time network corrections are available by wireless modem through Leica's Spider Network to individual rovers providing survey-quality, millimeter-accurate results from Olympia to Bellingham. All of this advanced gadgetry allows us to exceed the requirements of every project.

Construction Staking Services—Puget Sound, WA

Perteet surveyors successfully completed construction staking on more than 200 projects in the last five years alone.

• Everett Crosstown Sewer
• Marine Drive Location and Construction Survey—Snohomish County, WA
• Sub-grade, slope stakes, finish grade & blue-topping
• More than 40 school sites throughout the Puget Sound region
• Parking Garage Walls Construction Staking and Monitoring—Snohomish County, WA
• Everett Station
• Terry’s Corner, Camano Island, WA
• Edmonds Fire Station #16 Construction Staking—Edmonds, WA

GIS Utility Inventory—Tukwila, WA

Perteet provided the City of Tukwila with a utility inventory and GIS of public utilities in three areas of the city. Perteet provided real-time Kinematic surveys and data acquisition of storm drainage structures and systems, sanitary sewer structures, waterline appurtenances, and traffic signals in an area roughly bounded by I-5, SR 99, and the south city limits. We developed a custom data dictionary with input from Terra Logic GIS and the City of Tukwila, providing inventory data fields for the field crews to complete during the survey. This data, along with positioning information, was translated to the city’s GIS format for inclusion in their database.

I-405 Right of Way Plans—WSDOT

The Perteet Survey Team was selected to provide right-of-way plans for 28 miles of the I-405 Corridor, from I-5 in Tukwila to the King/Snohomish County line.

Key to the success of the project was close coordination with the Olympia Service Center through a series of weekly reviews. To meet the accelerated project schedule, we divided the project between two teams that worked simultaneously at each end of the project.

Field surveys were performed primarily using Real Time Kinematics (RTK) and Global Position System (GPS) to determine or confirm the location and position of section subdivision monuments. During the first phase of the project, 20 sections containing a total of 85 monuments were surveyed. Centerline geometry from existing right-of-way plans was calculated using Least Square adjustment techniques to resolve the section corner ties and centerline in one mathematical procedure.

The results maintained the integrity of the centerline data and resolved the position of the I-405 centerline in relation to the section corners. The centerline data was then recalculated, removing any spiral curves in the alignment to prepare a new simple curve I-405 baseline for the preparation of right-of-way plans. We also calculated the boundaries of 81 plats and analyzed 675 individual property descriptions. Our research included interchanges and/or crossing street rights-of-way. And we surveyed three railroad locations, calculating their alignment and right-of-way based on 1911 railroad right-of-way plans.

Based on our surveys and calculations, eight Washington State Department of Transportation (WSDOT) right-of-way plan sets were prepared in Microstation—containing approximately 500 total sheets. Nine Records of Survey maps (totaling approximately 60 pages of the alignment and three of the crossing of the Sammamish, Green and Cedar Rivers) were also prepared and filed with King and Snohomish County Auditors and the DNR.