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2. Utility location - Wikipedia

   en.wikipedia.org/wiki/Utility_location

   Utility locator tool in use (Perry, Oklahoma, 2011) Utility location is the process of identifying and labeling public utility mains that are underground. These mains may include lines for telecommunication, electricity distribution, natural gas, cable television, fiber optics, traffic lights, street lights, storm drains, water mains, and wastewater pipes.

3. Cable locator - Wikipedia

   en.wikipedia.org/wiki/Cable_locator

   Cable locator. A cable locator or cable avoidance tool ( CAT) is an instrument used for detecting the presence and approximate location of buried services in advance of undertaking excavation works. It aims to avoid accidents while excavating. [ 1] A number of types of detecting technology can be employed by such instruments, including use of ...

4. Ground-penetrating radar - Wikipedia

   en.wikipedia.org/wiki/Ground-penetrating_radar

   Ground-penetrating radar ( GPR) is a geophysical method that uses radar pulses to image the subsurface. It is a non-intrusive method of surveying the sub-surface to investigate underground utilities such as concrete, asphalt, metals, pipes, cables or masonry. [ 1] This nondestructive method uses electromagnetic radiation in the microwave band ...

5. Directional boring - Wikipedia

   en.wikipedia.org/wiki/Directional_boring

   Directional boring. Directional boring, also referred to as horizontal directional drilling ( HDD ), is a minimal impact trenchless method of installing underground utilities such as pipe, conduit, or cables in a relatively shallow arc or radius along a prescribed underground path using a surface-launched drilling rig.

6. Underground pneumatic boring - Wikipedia

   en.wikipedia.org/wiki/Underground_pneumatic_boring

   The purpose of the drill is to create a tunnel under surface obstructions. First, the operator surveys the area and the obstacle (road, sidewalk, driveway). Utility locators must supervise any underground work, and the path most clear of utilities is chosen to send the tool through. The first hole is dug on one side of the obstacle.

7. List of power stations in Illinois - Wikipedia

   en.wikipedia.org/wiki/List_of_power_stations_in...

   Wind (12.4%) Solar (1.1%) Biomass (0.2%) Petroleum & Other Gases (0.2%) Hydroelectric (0.1%) Other (0.1%) Illinois electricity production by type. This is a list of electricity-generating power stations in the U.S. state of Illinois, sorted by type and name. In 2022, Illinois had a total summer capacity of 44,163 MW and a net generation of ...

8. Utility tunnel - Wikipedia

   en.wikipedia.org/wiki/Utility_tunnel

   A utility tunnel, utility corridor, or utilidor is a passage built underground or above ground to carry utility lines such as electricity, steam, water supply pipes, and sewer pipes. Communications utilities like fiber optics, cable television, and telephone cables are also sometimes carried. One may also be referred to as a services tunnel ...

9. Chicago Tunnel Company - Wikipedia

   en.wikipedia.org/wiki/Chicago_Tunnel_Company

   The Chicago Tunnel Company was the builder and operator of a 2 ft (610 mm) narrow-gauge railway freight tunnel network under downtown Chicago, Illinois. This was regulated by the Interstate Commerce Commission as an interurban even though it operated entirely under central Chicago, did not carry passengers, and was entirely underground. [1]