Types of Utility Markers
There are different types of utility locator marks designed for various applications and outdoor conditions:

Plastic utility locator marks
Plastic is a very common material used for universal marker balls. They are inexpensive and durable for most environments. Plastic markers come in a variety of colors with labels to identify the type of utility below.

Metallic utility locator marks
Metallic markers, usually made of aluminum, are more reflective and visible than plastic versions. They are ideal for areas with heavy vegetation or in lower light conditions. Engraved labels make identification easier from a distance.

Magnetic utility locator marks
Some metallic Utility Markers have integrated rare-earth magnets. This allows them to self-right if accidentally struck or disturbed from their installed position above the utility. The magnetic attraction helps the marker spring back up for maximum visibility.

Fluorescent utility locator marks
For maximum visibility, especially at night or in low light, fluorescent marker balls glow brightly under black lights. Airports and other safety-critical areas commonly use fluorescent utility locator marks.

Installing and Maintaining utility locator marks
To properly mark underground utilities, markers should be installed directly above the buried lines at regular intervals. The distance between markers depends on local regulations but is typically every 25 to 50 feet.

Markers are installed by manually pushing or hammering them into the ground until flush with the surface. This ensures the top half is visible while holding the bottom half securely in place above the utility.

Periodic inspection and maintenance is important as markers can shift positions over time due to soil erosion, vegetation growth, or construction activity nearby. Displaced markers lose their effectiveness and should be re-secured in their original locations. Proper identification labels also need replacement if worn. Compliance with utility marking guidelines prevents accidents and outages.

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