A large construction company had a project in West Seattle, building a new apartment and retail complex. There was a need to install new floor outlets throughout the building, which meant concrete sawing and coring was needed. Prior to beginning the sawing and drilling processes, the contractor contacted Ground Penetrating Radar Systems of Portland to scan the floors to locate the reinforcing steel and any conduit present. GPRS used a 1600 MHz antenna for the project that allowed for precise locating of the reinforcement/conduit. GPRS marked the reinforcing steel pattern and conduit locations directly on the floor using black permanent marker so the cutting and coring areas were clear prior to continuing the project. The general contractor had all the information needed to proceed with confidence, to drill and saw through the floor and install the new electrical outlets.

To learn more about the capabilities of GPRS in the Pacific Northwest, contact Project Manager, Eric Steyer, at 503.502.4781 or eric.steyer@gp-radar.com.

GPRS LLC. of Portland was contacted by a large general contractor working on a new apartment complex in the area to locate floor drain cleanouts that had accidently been covered over with concrete during the final pouring of a grade slab. These cleanouts were metallic and approximately 8 cm diameter. It was estimated that 2-4 cm of concrete was poured over each cleanout, and these drains needed to be located in order to avoid the task of replacing each one. All other methods by the plumber and build team to locate these targets fell short, and scanning was considered a last resort. GPRS mobilized to the job site later the same day, and the scan took around 3.5 hours to complete. Since no formal plans or dimensions were kept to help describe the location of each drain, a grid scan of 4” on center spacing was performed over the entire slab.

An environmental company contacted Ground Penetrating Radar Systems of Portland to help try to identify a possible UST in Portland, OR. The company was concerned that a possible storage tank was left on the property from the 1940’s. Ground penetrating radar, radio detection, and a magnetometer were used to survey all of the property for a UST. The methods that are utilized by GPRS are mobile & cost effective allowing real time results so the company could know the results instantaneously. They were now free to move forward with any future construction plans.

To learn more about the capabilities of GPRS in the Pacific Northwest, contact Project Manager Eric Steyer, at 503.502.4781 or eric.steyer@gp-radar.com.

Ground Penetrating Radar Systems, LLC (GPRS) was hired to scan both sides of a recently poured foundation with known existing reinforcement at a 100 year old high school being renovated in Portland, Oregon. Due to the critical structural integrity of this supporting foundation, it was crucial to avoid hitting any reinforcement. GPRS was able to scan through a weather resistant cover by using our state of the art 1600 MHz concrete scanning equipment. Using this, we were able to see the full depth of the 12 inch thick wall to ensure the rebar at the deepest points were being found and marked on the surface to avoid. Rebar was found at depths ranging from 6 inches to 8 inches in a grid-like pattern. With all the relevant rebar marked out in yellow, the contractor was able to proceed with confidence knowing that the core drilled would avoid compromising the structural integrity. GPRS covers all of Oregon offering a wide range of applications for both commercial and residential customers including: Private Utility Location, Underground Storage Tank Location, Void Detection,...

The United States Coast Guard contacted Ground Penetrating Radar Systems of Portland to locate underground pipes and utilities at their Newport, OR base. The base was planning to install a new backup generator on the grounds and wanted to know where the existing lines ran as to plan a route around them in the construction process. Ground penetrating radar & radio detection were used to map the lines on the surface with their corresponding depths. The methods that are utilized by GPRS are extremely accurate and cost effective, providing instantaneous results with a small margin of error. The facility could now move forward with planning a route that will not conflict with any current underground obstructions.

To learn more about the capabilities of GPRS in the Pacific Northwest contact Project Manager, Eric Steyer, at 503.502.4781 or eric.steyer@gp-radar.com.

A construction company was in need of reinforcing confirmation in an elevator shaft of a large apartment complex. There was concern that no reinforcing steel was used to build the CMU wall. Prior to beginning the inspection process, the company contacted Ground Penetrating Radar Systems of Portland to scan the elevator shaft to locate any rebar present. GPRS used a 1600 MHz antenna for the project that allowed for precise locating of the reinforcement. GPRS marked the reinforcing steel locations directly on the walls using black permanent marker, as well as providing a detailed written report of the findings. The company was then able to proceed with confidence in knowing that the elevator shaft was properly built and supported.

To learn more about the capabilities of GPRS in the Pacific Northwest, contact Project Manager, Eric Steyer, at 503.502.4781 or eric.steyer@gp-radar.com.

GPRS LLC of the Pacific Northwest was called out to provide a utility location scan in a busy city street near downtown Portland. The work was performed overnight in order to fully shut down multiple lanes of the road so that the survey could take place with minimal impact to traffic, and with the greatest level of safety. 811 One Call was set up by GPRS for the project, and they had marked out the utilities on city plans one a previous day. The main reason that we are called after One Call was to verify the accuracy of the city locating, and to find any additional unknown utilities that may have been present and were not on city plans to begin with. GPRS located two additional utilities onsite; a street lighting conduit in the sidewalk, and a communication duct bank that was also running in the sidewalk. The photo below shows a small portion of the scan, and shows gas lines, the street lighting conduit, and the communication duct bank.

The contractor that hired GPRS was planning on removing the sidewalk in order to widen the street in this area, so it was very critical...

Ground Penetrating Radar Systems, LLC. (GPRS) was called for a commercial utility locate on a public school property near Portland, Oregon. There was a need to find any existing utilities which may interfere with post holes being dug for a new fence. On this project our ground penetrating radar (GPR) 400 MHz antenna was used to accurately see depths as much as 6 feet below the surface. GPRS also used our Radio Detection equipment as a secondary verification of the accuracy for our GPR findings. We were able to locate a critical power line running across the proposed fence line at 5 feet below the surface. GPRS covers all of Oregon offering a wide range of applications for both commercial and residential customers including: Private Utility Location, Underground Storage Tank Location, Void Detection, Reinforcement Layout, Post Tension Cable Locating, and more! When you need to know what exists below, call GPRS.

To learn more about the capabilities of GPRS in the Pacific Northwest, contact Project Manager, Mark Edwards, at 503-502-4781 or mark.edwards@gp-radar.com

GPRS LLC. of the Pacific Northwest was called by an underground storage tank and fuel station installation company. We were tasked with locating all underground utilities prior to excavation of the fueling station footprint, as well as prior to trenching to an existing power transformer. The site in question was a high security site, and shut down of power or damage to any utility on site would have been a major cost and loss of time to the client. GPRS began by confirming storm drain locations in the parking lot, and locating any risers or visually exposed conduits to tone onto. We then began to scan the area with ground penetrating radar for any obstructions, or passive utilities that could have interfered with excavation, High voltage power lines were found entering and exiting the area of the existing transformer, and were clearly marked using paint and flags.

A private contracting company contacted Ground Penetrating Radar Systems of Portland to map out underground pipes and utilities prior to excavation and construction of new buildings. The area in question contained a large number of existing pipelines that needed to be avoided during the construction process. Ground penetrating radar & radio detection were used to map the lines on the surface with their corresponding depths. The methods that are utilized by GPRS are extremely accurate and cost effective, providing instantaneous results with a small margin of error. A survey company was then able to follow directly behind GPRS to GPS all of the lines using their surveying equipment, allowing the construction company to proceed at their leisure without fear of hitting any underground obstructions.

To learn more about the capabilities of GPRS in Portland and the Pacific Northwest contact Project Manager, Eric Steyer, at 503.502.4781 or eric.steyer@gp-radar.com.