Locate Underground Utilities
Ground Penetrating Radar
GPRS performs a variety of ground-based applications which include detecting gas, water, electrical, cable, and fiber optics lines and wires prior to excavation or building.
Utility-detection is a two-step process, employing both radio detection and GPR. We may scan the desired area with radar and/or utilize radio detection equipment on the job site prior to digging. Our goal is to identify the type and location of these utilities in order to prevent damage to them and the surrounding environment as well as protect your workers on the job site.
To provide the most comprehensive picture of existing sub-surface utilities on your job site, our ground-based services should be used in conjunction with your state’s one-call utility detection agency as well as any other utility data in your possession. GPRS is proud of our commitment to safety, and we encourage our clients to obtain as much information as possible about project areas in order to ensure a secure and responsible work environment.
Video: Locating Utilities On A Commercial Site
Video: Learn More About GPRS
When determining cost and price quote for your underground private utility locating job, these are some considerations:
1. Location of the project and objectives of the underground utility survey.
2. What are the known utilities services on site? Are any plans available for the locators to review?
3. How large is the project area we need to locate (i.e. how many acres)?
4. How many buildings or structures are on the site? If we are able to see the site on Google Earth this helps us in estimating a private utility locating project.
5. How congested is the area our locators need to work in (i.e. equipment, structures)?
Ground Penetrating Radar is used in conjunction with Electromagnetic Induction.
In order to provide the most comprehensive utilities survey, GPRS employs electromagnetic induction technology in conjunction with ground penetrating radar. We use hand-held electromagnetic induction equipment (RD-4000) consisting of a base unit and a wand to locate metallic pipes, live electrical currents, or signals from live communications wires. We may use electromagnetic induction, for example, to assist in areas where soils are not conducive to locating utilities using only GPRS.
GPRS is excited to provide global positioning system (GPS) technology for use on your outdoor projects, such as environmental surveys and the detection of underground utility layouts. In conjunction with our GPR and electromagnetic induction technologies, we use a hand-held GPS device to create a comprehensive map of the underground area of your job site that then can be overlaid onto CAD documents and / or Google Earth maps. Utilizing GPS technology along with our GPR and EMI services will give you a permanent record of the physical reference points of your project area’s underground environmental / utility layout. For more information on this resource, please contact your local GPRS representative today!
Locating Reinforced Concrete and Vitrified Clay Pipe
Our GPR technology can locate the reinforced concrete pipe used in underground sewer and storm drainage systems. These materials often run beneath roadways and asphalt parking lots as well as along drainage culverts. Likewise, GPRS can identify the location and coordinates of sanitary sewer lines and clay drainage tiles buried underground.
It is to your benefit to determine the exact location of these structures before beginning
Locating Trench Lines
GPRS can assist you with both the development and detection of trench lines. First, we use GPR to locate current underground utilities that will cross your proposed trench line. Second, GPRS can perform a utility survey to identify where an existing trench line begins. In the event that a pipe cannot be located easily, we can approximate its location by identifying the trench line that surrounds the pipe.
Example of Damaged Utility Lines. Call Before You Dig!
private utility locating Examples
Ground Penetrating Radar helps you to locate underground utilities faster and cheaper than the alternatives (ex. vacuum excavation, water blasting). Here are a few examples of how Ground Penetrating Radar Systems has located difficult to find underground utilities.
Example 1: A high-voltage electrical duct bank in the path of an excavation. Contractors working on this project were aware of it, but were amazed to see it was less than 4 feet deep.
Example 2: Two large product lines in a refinery - 4' and 5' deep. The refinery requested all utilities be located and assigned an approximate depth prior to staging a crane in the area. The crane's weight could have crushed any utility within 30" of the surface.