Identifying Pipelines

The pipeline right-of-way must be kept clear of any structures, trees, shrubs, excess vegetation, fence posts, electric / telephone poles, or other encroachments which might damage and/or restrict access to the pipeline or pipeline markers. It is illegal to remove pipeline markers. Please contact MarkWest if you have concerns with placement of pipeline markers. 

The right-of-way protects the public and the pipeline. If you notice any possible encroachments to MarkWest pipeline right-of-way, or if you need to install a structure near the right-of-way, please remember to always call the state One-Call Centers before any digging. 

MarkWest Operating States

Required Wait Time Before Digging

811 Phone Number

Kentucky

2 Working Days

(800) 752-6007

West Virginia

2 Days

(800) 245-4848

Michigan

72 Hours

(800) 482-7171

New Mexico

2 Working Days

(800) 321-2537

Ohio

48 Hours

(800) 362-2764

Oklahoma

48 Hours

(800) 522-6543

Texas

2 Working Days

(800) 344-8377

Pennsylvania

3 Business Days

(800) 242-1776

Pipeline markers are located along the right-of-way to help identify the approximate location of the pipeline, the commodity transported, and the 24-hour Emergency number where we can be reached 24 hours a day 7 days a week.

Below are some examples of line markers you might see along a pipeline.

Pipeline Markers

Here is a breakdown of the information on a line marker.

If you know of any damage, even if it’s minor, missing pipeline marker, or have seen anyone damaging / vandalizing MarkWest pipeline markers, please report it to us. It’s against the law for any person to willfully and knowingly deface, damage, remove, or destroy any pipeline sign or right of way marker.

MarkWest Emergency Contact Phone Numbers

System Name

Operating State(s)

Products Transported

Emergency Phone #'s

Alps Ranger

Kentucky & West Virginia

Natural Gas Liquids

(877) 675-9378

Appleby

Texas

Natural Gas

(800) 852-9225

Asherton

Texas

Natural Gas

(800) 852-9225

Bluestone

Northern Pennsylvania

Natural Gas & Natural Gas Liquids

(866) 342-6914

Buffalo Creek

Oklahoma & Texas

Natural Gas

(800) 852-9225

Central Liberty

Pennsylvania

Natural Gas & Natural Gas Liquids

(866) 342-6914

East Texas

Texas

Natural Gas & Natural Gas Liquids

(800) 677-6360

Edwards

Texas

Natural Gas

(800) 852-9225

Hobbs

New Mexico

Natural Gas

(800) 852-9225

Javelina

Texas

Natural Gas & Natural Gas Liquids & Hydrogen

(361) 289-4777

Kingfisher

Oklahoma

Natural Gas & Crude

(800) 852-9225

Lake Whitney

Texas

Natural Gas

(800) 852-9225

MI Crude

Michigan

Crude

(866) 342-6914

Power-Tex

Texas

Natural Gas

(800) 852-9225

Rio Nogales

Texas

Natural Gas

(800) 852-9225

Southeast OK

Oklahoma

Natural Gas

(800) 852-9225

Southern Liberty

Northern WV

Natural Gas & Natural Gas Liquids

(866) 342-6914

Utica

Ohio

Natural Gas & Natural Gas Liquids

(855) 878-4859

Western OK

Oklahoma

Natural Gas

(800) 852-9225